g Water Island

8/2/2019 g Water Island

1/36

Integrated Coastal Resources Database (ICRD)

Integrated Coastal Zone Management Plan Project (ICZMPP)

Water Resources Planning Organization (WARPO)

Ground Truthing of Inventory

of

Islands and Chars in the Coastal Zone

Dhaka

June 2005

Prepared by


2/36


3/36

i

Preface

Ground truthing inventory of islands in the coastal zone is to assist the Integrated Coastal Zone

Management Plan (ICZMP) Project by making the information of coastal islands easily available. The

study is one of the components of the Knowledge gap filling of Integrated Coastal Resources

Database (ICRD). This was initiated as a short-term study titled Inventory of Coastal and Estuarine

Islands & Chars in 2001 by PDO-ICZMP. The former study bring forward a recommendation to

initiate an extensive ground truthing and further updating of the collected information. CEGIS has

been given the responsibility to proceed on with the suggested methodology for carrying out the study

stated in the Terms of Reference (ToR) for development of ICRD. The whole activity is planned

considering the issues associated with the future incorporation and updating of the information and

easy management of the presently available information. It involves investigation of some primary

and secondary information sources of the coastal area. Through this study some essential andfundamental issues were evolved which have been tried to deal with. While demarcating and defining

the marine/estuarine and riverine region and islands and chars, the physical, socio-economical,

environmental and development aspects of the coastal area have been considered.

This report is the documentation of the approach, methodology, activities and outputs of the study. It

also includes the limitations and recommendations for the future activities necessary to improve the

understanding of the Islands and Chars of the coastal region of Bangladesh from all possible aspects.


4/36

ii

Study Team of CEGIS

Malik Fida A Khan, Project Manager, ICRD, CEGIS

Chitta Ranjan Gupta, Task Leader, ICRD, CEGIS

Motaleb Hossain Sarker, GIS and Database Specialist, CEGIS

Md. Mostafizur Rahman, GIS Analyst, CEGIS

Mohammad Shahidul Islam, RS Analyst, CEGIS

Sadik Ahmed, GIS Analyst, CEGIS

Md. Mominuzzaman, Technical Assistant, CEGIS

Md. Torikul Islam, Technical Assistant, CEGIS


5/36

iii

Acknowledgement

The study is the concerted efforts of the CEGIS team with the valuable advices from WARPO and

ICZMP personnel. Supports of Mr. HS Mozaddad Faruque, Director General of WARPO and Mr.Giasuddin Ahmed Chowdhury, Executive Director of CEGIS are gratefully acknowledged.

Suggestions and guidance from Mr. M.A. Baten, PSO (IT) and Mr. Kazi Rezaul Karim. SSO of

WARPO were very much valuable for this study. Mr. M. Rafiqul Islam, Team Leader and Abu M.

Kamal Uddin, Senior National Expert of ICZMP were always given us pragmatic solutions to

problems arose during this study. Mr. Maminul Haque Sarker, Morphologist, Ms. Iffat Huque,

Remote Sensing Expert, Mr. Sultan Ahmed, Program Manager Liaison and Mr. Ehsan Hafiz

Chowdhury, Database Expert, of CEGIS were contributed to this study with their precious expertise

in respective fields. Thanks to Mr. Sayeefur Rahman Rizvi for his support in designing the cover

page.


6/36

iv

Summary

Islands and chars in the coastal region has been categorized into 3 different classes: 1) Detached

riverine char 2) Chars attached with mainland 3) Marine & Estuarine Islands. This study identified185 islands and chars in the coastal region. Among these 21 chars are identified as Detached

riverine char,92 charsare identified as Chars attached with mainland and 72 islands are identified

as Marine & Estuarine Islands. Marine & Estuarine Islands are those which are located within the

area with tidal range of 2 to 6m (Macro and Meso-tidal). Associated information of islands and chars

were collected mainly from Marine & Estuarine Islands. The following summary information is

prepared on the basis of the primary and secondary information sources and field visits.

The Marine & Estuarine Islands, hereafter called as islands, are located mostly in 11 coastal districts

(Bagerhat, Barguna, Bhola, Chittagong, Cox'S Bazar, Khulna, Lakshmipur, Noakhali, Patuakhali,

Pirojpur and Satkhira). The islands area covers 15% of the total districts area. The highest 20 islands

have been found in Patuakhali district. The area of the islands is36%

of the total district area ofPatuakhali. The district Bhola has the second highest 18 islands, which is 79% of the entire district

region.

The total population in these islands are 3 millions. 13% of the total population of the above

mentioned 11 coastal districts is living in the islands. Bhola has the highest 93% district population

living in the islands. No permanent population has been found living in the islands in Barguna,

Khulna, Pirojpur and Satkhira districts. Among these 72 islands, 35 have no permanent population.

The average population density and household size of these islands are about 568 person/sq. km. and

8 respectively.

In the above mentioned 72 islands there are only 2 cyclone shelters for every 10,000 people. Islands

located in Bagerhat, Barguna, Khulna, Pirojpur and Satkhira have no cyclone shelters. There are only6 cyclone shelters for every 10,000 people (which is the highest among these 11 districts) in the

Noakhali district. Among the 72 islands, only 14 islands are protected by embankments or polders;

rests 58 inlands are unprotected.

17% of the island area is covered with mangrove forest. Rest of the area is covered by settlement,

potential agricultural land, fellow land and Uri grass.


7/36

v

Table of Contents

Preface ........................................................................................................................................................... i

Study Team of CEGIS ................................................................................................................................ ii

Acknowledgement ...................................................................................................................................... iii

Summary ..................................................................................................................................................... iv

Table of Contents ........................................................................................................................................ v

List of Figures ............................................................................................................................................. vi

List of Tables .............................................................................................................................................. vi

Annexes ....................................................................................................................................................... vi

Abbreviations ............................................................................................................................................ vii

Chapter 1 Introduction ............................................................................................................................... 1

1.1 Background .................................................................................................................................... 1

1.2 Objective ........................................................................................................................................ 1

1.3 Output ............................................................................................................................................ 11.4 Scope of work ................................................................................................................................ 1

Chapter 2 Approach and Processes ........................................................................................................... 32.1 Approach ....................................................................................................................................... 3

2.2 Processes ........................................................................................................................................ 3

Chapter 3 Process Description, Analysis and Outputs ............................................................................ 5

3.1 Introduction ................................................................................................................................... 5

3.2 Processes ........................................................................................................................................ 5

3.2.1 Evaluation of different sources .....................................................................................5

Primary data source.......................................................................................................................... 5

Satellite Imagery ......................................................................................................................... 5

Field Data .................................................................................................................................... 6Secondary data source...................................................................................................................... 7

FINNMAP................................................................................................................................... 7

SoB Topo Sheet .......................................................................................................................... 7

Forest Map .................................................................................................................................. 7

Settlement Database, NWRD ...................................................................................................... 7

Union Database, NWRD and Mauza database, CEGIS .............................................................. 7

Inventory report on char lands in southwest coastal region of Bangladesh, CDP ...................... 7

3.2.2 Data Collection & Extraction .......................................................................................8

Data Collection from field visit ....................................................................................................... 8

Data Collection from ICZMP Technical Note ................................................................................. 9

Data extracted from Satellite Images ............................................................................................... 9

Data extraction from Settlement, Union, and Mauza databases ...................................................... 9

3.2.3 Identification of islands and chars ..............................................................................10

3.2.4 Classification of islands and chars .............................................................................10

3.3 Outputs ........................................................................................................................................ 13

Chapter 4 Information System ................................................................................................................ 19

4.1 Objectives .................................................................................................................................... 19

4.2 Directory structure ....................................................................................................................... 19

4.3 Working with Application ........................................................................................................... 19

4.3.1 CIIS organization .......................................................................................................19

Introduction .................................................................................................................................... 20Map viewer .................................................................................................................................... 20


8/36

vi

Zoom In, Zoom Out .................................................................................................................. 21

Pan ............................................................................................................................................ 21

Full extent ................................................................................................................................. 21

Map Tips ................................................................................................................................... 21

Labeler ...................................................................................................................................... 21

Find ........................................................................................................................................... 22Add Text ................................................................................................................................... 22

Pointer ....................................................................................................................................... 22

Attribute data ................................................................................................................................. 22

Identify Result ................................................................................................................................ 23

4.3.2 Copy and Export Map ................................................................................................24

4.3.3 Labeling and classifying facilities ..............................................................................24

Chapter 5 Conclusions .............................................................................................................................. 25

References .................................................................................................................................................. 26

List of Figures

Figure 2.1: Process Diagram ......................................................................................................................... 4

Figure 3.1: LandSat TM, 2003 ...................................................................................................................... 6

Figure 3.2: Deferent tide level in Meghna Estuary. (Source: Hydro-morphological dynamics of the

Meghna Estuary, MESII, July 2001) ....................................................................................... 12

Figure 3.3: Cluster Island ............................................................................................................................ 13

Figure 5.1: Introduction Page ..................................................................................................................... 20

Figure 5.2: The main page of the CIIS ....................................................................................................... 20

Figure 5.3: Tools in the toolbar ................................................................................................................... 21

Figure 5.4: Find Result ............................................................................................................................... 22Figure 5.5: Attribute Information................................................................................................................ 23

Figure 5.6: Identify Result .......................................................................................................................... 23

Figure 5.7: Symbol Properties .................................................................................................................... 24

List of Tables

Table 3.1: Information Categorization .......................................................................................................... 9

Table 3.2: List of sources and corresponding codes ................................................................................... 10

Table 3.3: Island/char class table ................................................................................................................ 11

Table 3.4: Bundle information of the table ................................................................................................. 15Table 3.5: List of the field names and its description ................................................................................. 16

Table 3.6: Number of islands in each class ................................................................................................. 17

Table 3.7: District wise summary of Islands ............................................................................................... 17

Table 3.8: Island summary table. ................................................................................................................ 18

Annexes

Annex I: Field Survey Form

Annex II: Map of Islands/Chars

Annex III: Inventory of Coastal Islands/CharsAnnex IV: Location Information of Islands/Chars (ArcView GIS Table)


9/36

vii

Abbreviations

BBS Bangladesh Bureau of Statistics

BIWTA Bangladesh Inland Water Transport Authority

BTM Bangladesh Transverse Mercator

BWDB Bangladesh Water Development Board

CDP Coastal Development Partnership

CDSP Char Development and Settlement Project

CEGIS Centre for Environmental and Geographic Information Services

CERP Coastal Embankment Rehabilitation Project

CIIS Coastal Island/Char Information SystemDAE Department of Agricultural Extension

DLRS Directorate of Land Record and Survey

DoF Department of Fisheries

EEZ Exclusive Economic Zone

FD Forest Department

GCP Ground Control Point

ICRD Integrated Coastal Resources Database

ICZMP Integrated Coastal Zone Management Plan

LGED Local Government Engineering Department

MES Meghna Estuary Study

MoL Ministry of Land

PDO Program Development Office

SoB Survey of Bangladesh

WARPO Water Resources Planning Organization


10/36

viii


11/36

1

Chapter 1

Introduction

1.1 BackgroundGround Truthing Inventory of Islands and Chars is one of the activities for development of Integrated

Coastal Resources Database (ICRD) of Integrated Coastal Zone Management Plan project of Water

Resources Planning Organization to verify and update the existing inventory with latest available

information and knowledge. The nature of the coastal zone, part of which is in a very dynamic delta,

is deferent from the rest of the country. The complex part is located at the human-nature interface. For

better understanding of these complexities, quality and reliable up-to-date information is required for

coastal area. A considerable amount of information has been generated under different projects in the

coastal area and estuaries of Bangladesh. This valuable information is scatter rather to keep available

from a single source. The Ground Truthing Inventory of Islands and Chars in the Coastal Zone isone of the components of the Knowledge Gap Filling which involves collection and collation of

primary and secondary information about the coastal Islands and Chars.

The coastal zone of Bangladesh consists of 147 Upazillas of 19 Districts and Exclusive Economic

Zone (EEZ) in the Bay of Bengal. This area has huge resource potential as well as is prone to

vulnerability like tide, cyclones, storm surge, salinity intrusion etc.

To explore, identify and utilize the resources, to reduce the vulnerabilities of the coastal lives for

improving the living standard of costal people by enhancing their livelihood capacities (poverty

reduction) and to coordinate and harmonize the development activities of all implementing agencies

working in coastal area for maintaining a healthy eco-system, the concept of Integrated Coastal Zone

Management (ICZM) has been evolved.

ICRD which is one of the 6 outputs of ICZMPP, will provide better information and understanding of

coastal conditions and processes. ICRD has an important function in structuring a sustainable ICZM.

1.2 ObjectiveThe overall objective of the study is to investigate the condition of the coastal islands and chars. The

specific objectives are to gather and verify the information on the location and area; demography and

livelihood condition; socio-economic condition; opportunities, infrastructure, communications,

vulnerabilities, involvement of government and non-government organizations / institutions in the

coastal islands and chars.

1.3 OutputThe direct outputs from this study are:

- Map of islands showing their location, administrative identity- Information System of the coastal island and char- Inventory report.

1.4 Scope of workScope of work includes the followings:


12/36

2

- Identification of island and chars, determining area and distance from mainland etc.- Collection of secondary information from different sources, such as, BBS, LGED,

BWDB, FD, DoF, DLRS;

- Review of studies on islands and chars carried out by different organizations e.g. MassLine Media Centre, CDP etc.;

- Preparation of fact sheet for each of the islands containing available information from thesecondary sources;

- Visiting islands verify and correct the information and fill the gaps;- Compilation and updating information and preparing inventory report.


13/36

3

Chapter 2

Approach and Processes

2.1 ApproachA stepwise approach has been developed for verifying and updating the inventory of the coastal

islands and chars of Bangladesh. This approach also includes the updating and ground truthing of

existing information of islands and chars and collection of additional data and information from field

survey and other agencies which are involved in the development and management of coastal island

and chars. Extensive field visits have been carried out to identify islands and chars. The inlands and

chars have been selected to visit in consultation with planners involved for development of ICZMP.

The adopted approaches are summarized below:

- Preparing a checklist and questionnaire after preliminary screening of the availableinformation and having discussions in relevant groups.- Searching literatures including available reports, books, maps, data for information on

selected parameters.

- Preparing fact sheet on islands compiling and synthesizing extracted information.- Developing semi-structured questionnaire/checklist for field survey.- Performing field survey work using questionnaire/check list to identified and selected

islands and chars.

- Formations of teams compose of 2/3 members for each team.- Compiling information collected from the surveys and revisit fact sheets- Preparing the inventory report and maps.

2.2 ProcessesInitially the primary and secondary sources have been identified. The sources were evaluated on the

basis of, completeness, history, purpose of production, process description and recentness. The

sources were found to be useful for attribute data collection and location identification. Figure 2.1

shows field survey, ICZMP technical note, satellite image, union and mauza map and settlement map

were used for both attribute data collection and location identification. In addition, Bangladesh map of

coastal area prepared by BIWTA (Finn map), SoB topographic map, forest map and map prepared byCDSP were used to identify the location of island and chars as well as cross check the collected data

and information.

A data conversion tool has been developed for extracting data from the different sources. GIS layers

were overlaid on each other to verify the location of the islands/chars. The final location information

has been stored in GIS database format.

The associated attribute information of islands and chars is also stored in the MS Access database

which can be linked with the Arcview GIS system. This attribute information can also be linked with

spatial data of islands and chars to classify on the basis of its characteristics (Marine/Estuarine,

Riverine etc), sources used for identification etc.


14/36

4

A information system has been developed which is independent of any GIS software for viewing,

search and performing queries, presentation and reporting. The system is fed by information from

Access database as well as Arcview GIS file. This system is capable for viewing both the attribute and

spatial information of islands and chars.

Figure 2.1: Process Diagram


15/36

5

Chapter 3

Process, Analysis and Outputs

3.1 IntroductionThe information collected under this study from the primary and secondary sources are used for

ground truthing of the existing information as well. However, extensive field visit and desk work has

been carried out to fill up the gap of the island and char information. All the collected information has

been stored in a single database.

The processes involve:

- Evaluation of different sources- Data collection and extraction- Identification of islands and chars- Classification of islands and chars

3.2 Processes3.2.1 Evaluation of different sources

The data sources are clustered into primary and secondary categories depending on the contain of

information. Primary source is identified as any data or information gathered by observing

phenomena or surveying respondents for this study and secondary data are the collected data for any

other study. The list of the sources which have been consulted for the identification of the islands and

chars are given below:

Primary data source

Satellite Imagery

Initially a mosaic (whole coastal zone) of dry-season (January and February) LandSat TM images

(30m resolution) of 2003 was used for identifying islands and chars. Where necessary available IRS

panchromatic (6m resolution) dry season (January, February and March) images of different years

(2002-04) were used to facilitate the identification process. IRS-P6 LISS III (23.5m resolution)

images of 2005 acquired in dry season (January and February) were used to calculate total area, forest

and land area. The boundaries of island and chars were delineated from the IRS-P6 LISS III. The

image is processed and geo-referenced by using the GCP data bank of CEGIS.

Geo-referencing of each image has been done using colleted ground control points (GCPs) for

representing the features precisely in correct location.

A set of 25 GCPs for each image was taken from 1:50,000 color maps derived from 1989 high

resolution SPOT satellite images. Since there are few preferred features within the river corridor,

other features such as ponds and uniquely shaped water bodies were used. For each GCP, the map

coordinates were obtained from the satellite image map and entered into a data file together with the

file coordinates of the same GCP identified in the digital satellite image. The coordinate pairs were

then used to compute a first order transformation matrix which was applied to the entire digital

satellite image to compute rectified coordinates for each image pixel. .


16/36

6

Using this procedure, each raw satellite image was re-sampled, using the nearest neighbor algorithm,

and transformed into a file referenced to the Bangladesh Transverse Mercator (BTM) projection.

Figure 3.1: LandSat TM, 2003

Field Data

The major key activity of ground truthing of existing data was to visit the islands and chars to collect

missing information and to verify the existing information also. A fact sheet was filled up for each

visit to island and char. This fact sheet also was used for preparing structured questionnaire/checklist

for the field work (see Annex I). Teams have been formed (each team composed of 2/3 persons) to

work together with GCP team in some cases. With the feedback from first field visit the selection of

islands and chars to be visited and a complete field survey planning have been prepared. It has been

decided to exclude data items to be collected through field survey, which are difficult to define. The

survey was mostly limited only in the estuarine islands. NGO's working in the coastal area were

consulted.ICZMP Technical Note

ICZMPP has published a series of technical notes on various coastal issues of which PDO-ICZMP

paper no. 06 titled Inventory of Coastal and Estuarine Islands & Chars is the basis of this study.

This technical note is reference document with all relevant information available on coastal islands

and chars. The study was done in 2001 and further modified in 2002.

Statistical yearbooks of BBS, reports of the Bangladesh Water Development Board (BWDB),

Ministry of Land (MoL), Department of Fisheries (DoF), Forest Department (FD), Department of

Agricultural Extension (DAE), projects (MES, CDSP, EGIS, and CERP), CDP a NGO working at

Khulna were used. Base maps of LGED; aerial photographs obtained through EGIS have also been

consulted. A limited field survey was done in the chars adjacent to the Sundarban Reserved Forest.

The following activities have been accomplished.

a) Relevant documents from the organizations were collected.


17/36

7

b) All relevant information available on coastal islands and chars from different sources were

compiled.

c) An inventory report accommodating relevant information was prepared.

Secondary data source

FINNMAP

FINNMAP is only source of high resolution published map in 1:10000 scale of coastal area is also

used for this activity. These maps were complied from aerial photographs taken in 1990 by

FINNMAP Oy and field identification and compilation was done in 1998. These maps are published

by Bangladesh Inland Water Transport Authority (BIWTA) in co-operation with FINNIDA (Finland)

and the Commission of the European Communities.

SoB Topo Sheet

Survey of Bangladesh (SOB) is the only national surveying and mapping agency in Bangladesh. SOB

is creating topographic database at a scale of 1:50,000 for feeding GIS and targeted to capture data of

the entire country by year 2004. Topographic maps of the Bengal were generated during the lastquarter of 18th century covering whole Bangladesh at a scale of 1:50,000. Map updating is a regular

process and done in every five to seven years. Presently SOB is digitally updating the base map of

Bangladesh. (Source: http://www.bangladeshgov.org/mod/sob/sobweb.htm)

Forest Map

Forest base map was derived from 1:50,000 SPOT satellite imagery of 1989 which was later amended

using 1:15,000 air photography in 1995 under the Forest Resources Management Project of

Bangladesh Forest Department. The administrative boundaries were derived from maps edited by

FAO/UNDP project Integrated Resources Development of the Sundarbans Reserved Forests , 1995.

The international and jurisdictional boundaries have been mapped in accordance with the available

base information. The boundaries of the Reserved Forests have been taken from existing maps. It has

been suggested to use these maps for only operational purposes and not to quote as an authority for

any legal purpose.

Settlement Database, NWRD

Spatial data layer of settlement area was delineated by Local Government Engineering Department

(LGED) using SPOT Image 1989-90, Aerial Photograph 1983-84,Topographic Maps, and ground

truthing under the project of UNDP/ILO, BGD/89/041. NWRD of WARPO has collated this

information and updated using recent satellite image. This data layer contains information of the area,

all administrative unit name of each of the settlements. CEGIS has updated this data layer in 2005 by

using IRS image of 6 m resolution.Union Database, NWRD and Mauza database, CEGIS

NWRD possesses different administrative boundaries of Bangladesh. The source of this dataset is

Police Station Maps published by Directorate of Land Record and Survey (DLRS), which were

compiled between 1922-1964. Some maps were also compiled after this period. Scale of these maps

were 1"=1mile. Reserve Forest maps published by Survey of Bangladesh (SoB) were used for

Sundarbans region. Attribute information were attached according to the geo-master database

collected from Bangladesh Bureau of Statistics (BBS).

Inventory report on char lands in southwest coastal region of Bangladesh, CDP

Coastal Development Partnership (CDP) initiated the process of preparing the inventory of char landsin the southwest coastal region in 2001-02 with the help of a network of 13 NGOs. A questionnaire


18/36

8

was prepared and distributed to fill it up by interviewing people and by focus group discussion.

Secondary information was collected from Upazilla settlement offices, AC land, and Union Parisad

offices.

3.2.2 Data Collection & Extraction

Existing sources of information on the islands and chars were reviewed for identification of Islands

and chars. Satellite images have been used for preparing a base map for field survey and finally was

used for identifying islands, estimating area, location, distance from mainland etc. Data on the islands

and chars through different secondary sources like, BBS, LGED, BWDB, FD, DoF, DLRS were

studied. The data from these sources could not be used directly because of the spatial resolution which

are collected by a administrative unit wise. The administrative unit wise data couldnt be used, as the

boundary of the Islands/chars sometimes, if not always, dont follow the administrative boundary.

These secondary data has been used to cross check the information gathered from the primary sources.

Data Collection from field visit

Initially, a field visit program was done at and around Saint Martins, Moheskhali, Kutubdia to have areconnaissance survey. With the feedback from this field visit, the selection of islands and chars to be

visited and a complete field survey planning was prepared. Field survey activities are summarized on

the basis of the experience of first field visit . These are described below:

- Information which are not possible to quantify through field visit should be excluded from thesurvey form.

- Additional measure was taken for the same name of more than one islands and chars- Islands were defined as those which are isolated from main land and mainly located in the sea.

The survey will be limited for the estuarine islands and char for basic data.

-

NGO's working in the coastal islands and char will be consulted.- Approximate number of Islands and chars will be counted using satellite imageConsidering the above criterion, information to be collected from filed is categorized into basic and

optional information. Basic information comprises somewhat defined fields which can be collected

almost accurately through the field team. Basic information includes the followings:

- Administrative (name of island, local name and surroundings)- Location (Thana, union, Mouza and GPS Reading etc)- Safety (Embankment, cyclone shelter, warning system and red cross activities

etc)

- Resources (Fishing, agriculture, forestry, tourism etc)- Mode of communication- Major Occupation- NGOs

Optional Information comprises of

- Infrastructure (Market, electricity etc.)- Drinking water & Sanitation (no of tube well, sanitary latrine etc)- Demography (Population, households, no households, households size etc)- Development opportunities


19/36

9

Based on the nature of information content the main fields are categorized in the following way

(Table 3.1):

Information Quantitative Qualitative Informative

Administrative Identity

Location (GPS reading)

Safety

Major occupation

Major communication

NGOs

Resources

Education

Infrastructure

Drinking water & sanitation

Demography

Table 3.1: Information Categorization

The whole coastal area has been divided into 4 regions to conduct the field visits. The islands and

chars in the Sundarban forest areas were excluded from the field survey plan as in the previous efforts

already a short field trip was conducted. Furthermore, the forest map of 2001 is available with plenty

of information about the area.

Data Collection from ICZMP Technical Note

Data has been extracted from the digital document prepared by PDO-ICZMPP using a customized

program in Visual Basic which can convert the text information into compatible format for MS

Excel or Access. The detail of the program has been given in the user manual.

Converted information was cross checked and viewed in the GIS software. Initially geographical

coordinates of islands and chars given in the report were used to locate the islands. The islands and

chars those have no information of geographical coordinate were identified and located with the

information of administrative name and location. The location of the islands were checked with the

secondary information and by field visits. Islands and chars those were not in the report or have no

location information were identified with information from secondary sources and/or field

information.

Data extracted from Satellite Images

The satellite images were used for identifying the islands, setting criteria for differentiating the

boundary of estuarine/marine and riverine zones, classifying islands and chars, defining the area of

the island and char. Other then this, images were used for land classification by separating Land,

water and mud flat and corresponding areas.

Data extraction from Settlement, Union, and Mauza databases

It has been seen that the name of some of the islands and chars are same as the name of Mauza or

Union. Thus the accuracy of the location of islands and chars is ensured up to Mauza level. The

location of islands and chars is determined or confirmed by using the Union and/or Mauza


20/36

10

boundaries. In the ICZMP paper 06 there are some of the islands and chars which have information on

administrative identity but have no latitude and longitude. The location of the Island and chars was

confirmed by using the Union and/or Mauza boundaries along with the description of the

administrative location of Island/Chars.

3.2.3

Identification of islands and chars

The images were used as a base layer for identification of the islands and chars. On top of the image

the layer containing islands and chars already located in ICZMP TN Paper 06, the GPS points

collected from the field survey, FINMAPs, SoB Topo maps and forest maps, settlement and

union/mauza layers were used. The location of an island and/or char were only was finalized when

two or more sources agreed about the location of the island and char in question. Source code for each

of the Islands was introduced in the database so that one can understand which and how many sources

has shown consensus about the location of the Island and char. The list of the sources with their

corresponding codes are given in the table 3.2.

Table 3.2: List of sources and corresponding codes

3.2.4 Classification of islands and chars

Different available studies were studied for developing criterion based on which the classification of

island and char would have to be done. A study on chars was carried out by the Irrigation Support

Project for Asia and the Near East (ISPAN) under the Flood Action Plan. The Riverine Chars in

Bangladesh, EGIS, 2000 is the published book based on the findings of that study as well as on

additional analysis carried out on river and char dynamics, particularly for the Jamuna River. The

ISPAN study looked into two different kinds of chars:island charsandattached chars. Island chars

were defined by the study as land that, even in dry season, can be reached from the mainland only by

crossing a main channel. Attached chars are accessible from the mainland without crossing a main

channel during dry season.

According to the PDO-ICZMP study on Inventory of Coastal and Estuarine Islands & Chars the

classification of Island and Char has been done as Marine & Estuarine Islands; Detached riverine

chars; and Chars attached with mainland.

As per Banglapedia (Asiatic Society of Bangladesh), Char defined as a tract of land surrounded by the

waters of an ocean, sea, lake, or stream. In the dynamics of erosion and accretion in the rivers of

Bangladesh, the sand bars emerging as islands within the river channel (island chars) or as attached

land to the riverbanks (attached chars). A distinction was made between island chars, which are

Source code Source Name1 Finnmap

2 LandSat

3 Mauza Database

4 Hazard map

5 SoB Topo Sheet

6 Field

7 ICZMP TN Paper 06

8 Settlement Database

9 Forest Map

99 CDSP


21/36

11

surrounded by water year-round and attached chars, which are connected to the mainland under

normal flow.

The following are operational criteria for defining the islands and chars:

Cluster Islands should be treated as single island keeping all information of individual islandsalong with.

Islands and chars which are possible to understand from satellite imagery to be attached to themainland or to a main island may be actually separated by a channel or river.

The classification of chars should be maintained as detached and attached. Islands and chars which is always surround by water should not be treated as attached or

detached

There should be two major groups of Chars and Islands: Riverine and Estuarine/marine. Islands must be surrounded by sea.

Lands that are within river should be treated as char. Chars and islands which are at present detached/attached may not be in the same state in the

future due to dynamic in nature of the formation of chars and islands.

The classification of Riverine chars done in different previous studies could be considered forclassifying estuarine/marine chars.

Accessibility, land fertility, infrastructure, development, agriculture, fisheries etc. should beconsidered to classify the islands.

Char which is a part of the mainland or attached to mainland (i.e. not separated by river/khal)should be excluded.

Considering the above points an Island is defined as a piece of land in the marine and estuarineregion, which is completely surrounded by water during low tide in dry season. And char is defined as

a small piece of land similar to Island but located in or adjacent to the river either attached or

detached.

Considering the above criterion, an operational classification has been proposed as follows

(Table3.3):

Code Description

1 Detached riverine char

2 Chars attached with mainland

3 Marine & Estuarine Islands

Table 3.3: Island/char class table

Detached char is considered as land that, even in dry season, can be accessible from the mainland only

through a main channel of the river. Attached chars are accessible from the mainland separated by a

minor channel during dry season.

To delineate the boundary between Riverine and Marine and Estuarine the extent of the tidal effect

has been considered. In the Meghna Estuary Study (MES) the region excluding the area at and around

the Sundarbans has been divided into 3 different regions: The area with variation in tidal range of

about 3 to 6 m (Macro-tidal), the area with tidal range of 2 to 4m (Meso-tidal) and the area with tidalrange less than 2m (Micro-tidal) (Figure 3.2). The boundary between the areas of the Meso-tidal and


22/36

12

micro-tidal has been considered as the demarcating line of the Riverine and Marine and Estuarine

region. The line has been extended to the further west of the MES area following the landline of the

Sundarbans inclusively.

Figure 3.2: Deferent tide level in Meghna Estuary. (Source: Hydro-morphological dynamics of the

Meghna Estuary, MESII, July 2001)


23/36

13

While applying the classification criteria, conflict has been arisen in defining some islands and chars

which are having different names but are very difficult to separate from each other. These clustered

islands and chars are attached together but detached as a group (Figure 3.3). The cluster name is

assigned based on the administrative unit which covers most of the area of the islands; as for instance

Thana, Union or Mauza. The islands and chars have been grouped by assigning same names and IDs

of the islands and chars which are in the same group. Therefore information can be used in bothgrouped and ungrouped condition.

Figure 3.3: Cluster Island

3.3 OutputsExisting information combined with information collected from the field survey are presented here.

Existing data has been updated and new data has been added with the table. Not all the islands and

chars are visited as decided in the task planning meeting. But all the possible islands and chars

identifiable by the used sources are identified. Therefore the number of islands and chars identified is

more than the number of islands and chars of which information has been collected.

Existing information and information collected from the field surveys are kept under the following

field names (Table 3.4):

Hatia Island


24/36

14

Sl No Field Name Description

1 ID Number by which the table can be linked with the island and char location

2 Name Name of the island and char

3 District The name of the district where the island and char is situated. This fieldhas been generated by spatial joining with the Mauza Map.

4 Class Code Island and Char Class Code

5 GroupID Applicable only those islands and Char which are grouped

6 Group Name Applicable only those islands and Char which are grouped

7Thana The name of the Upazila/Thana where the island and char is situated. This

field has been generated by spatial joining with the Mauza Map.

8Union The name of the Union where the island and char is situated. This field has

been generated by spatial joining with the Mauza Map.

9Mauza The name of the Mauza where the island and char is situated. This field

has been generated by spatial joining with the Mauza Map.

10Administrative

Identity

The administrative units by which the island can be defined. Sometimes it

also contains the history and some present aspect of the island and char

11Location Geographical location of the island and char with surrounding island and

char

12Latitude Latitude in global coordinate. This field has been generated from ArcView

GIS.

13Longitude Latitude in global coordinate. This field has been generated from ArcView

GIS.

14 Area Area of the island and char as collected from previous studies

15Calculated Area Area of the island and char composed of forest and land calculated from

Satellite Image of 2005

16 Forest Area Forest area of the island and char calculated from Satellite Image of 2005

17

Land Area Land area of Island and Char composed of settlement, potential

agricultural land, fellow land and Uri grass calculated from Satellite Image

of 2005

18Safety Information about the vulnerability against cyclone, bank erosion etc. and

protective measure

19 Cyclone Shelter No of Cyclone Shelters or Killas

20

Population Total population, number of male and female of the island and char.

Population information collected from field surveys is not the exact

numbers.

21

Household Information about number of households, Average household size,

dwelling type etc. Household information collected from field surveys are

not the exact numbers.


25/36

15

Sl No Field Name Description

22 Resources General resource information

23Agriculture Information about agricultural resources such as: amount of cultivable

land, crop type, household involved etc.

24Fisheries Information about type of fishing, amount of fishing, fishing source,

household involved etc.

25 Forest Information about type of forest, forest land area etc.

26 Livestock Information about number of different category livestock

27 Occupation Information about main occupation and population involved

28 Education Information about literacy rate, number educational institutions.

29 Communication Information about means of communication

30 OtherInfrastructures

Number/amount of other infrastructures

31Drinking Water

& Sanitation

Availability of drinking and sanitation facilities

32 NGOs Name of the NGO's working in the island and char

33Development

Opportunities

Information about potential development opportunities

34Other

Information

Information not covered in the stated fields

35Problem &

Constraints

Different problems and constraints

36Source/Referenc

e Books

References and sources of information

Table 3.4: Bundle information of the table

All tabular records (each island and char has single record) can be linked with the island and char

location by joining common fields named Link_id in the tabular record and ID in ArcView table.

Identified island and char has been stored in GIS format. Each island and char is shown as a point.The format of the table has been designed in such a way that one can categorize the island and char on

the basis of source used and island and char class. The list of the field names and its description is

given in the following table (Table 3.5):


26/36

16

Field Name Description

Id Unique Identification number same as Link_id of the access table

Name Name of the island/char

District The name of the district where the island/char is situated

Thana The name of the Upazila/Thana where the island/char is situated

Union The name of the Union where the island/char is situated

Mauza The name of the Mauza where the island/char is situated

Src_Code Unique code against each source

Cls_Code Island/char class code

Gr_Id Island/char id after being grouped

Gr_Name Island/char name after being groupedX_Coord Geo-referenced Coordinate

Y_Coord Geo-referenced Coordinate

Latitude Geographic coordinate

Longitude Geographic coordinate

Geocode Geocode for mauza

Area Area (in Sq. Km.) of the island and char composed of forest and land

calculated from Satellite Image of 2005

Mangrove Forest area (in Sq. Km.) of the island and char calculated from Satellite

Image of 2005

Land_Area Land area (in Sq. Km.) of Island and Char composed of settlement,

potential agricultural land, fellow land and Uri grass calculated from

Satellite Image of 2005

Cyclone_Sh Number of cyclone shelters

Table 3.5: List of the field names and its description


27/36

17

A total of 185 individual islands and chars were identified of which information of 144 islands and

chars were collected. During the identification of islands and chars the selection criteria has been tried

to follow but sometimes the demarcation seems to be not so clear. In these cases care was taken about

not losing the island and char itself and/or information of any island and char.The islands and chars

are classified into the above mentioned classes. The number of islands and chars in each of the classes

are shown in the table (Table 3.6) given below:

Code Description Number of Islands/Chars

1 Detached riverine char 21

2 Chars attached with mainland 92

3 Marine & Estuarine Islands 72

Table 3.6: Number of islands in each class

The final list of the updated information and the ArcView table have been given as Annexes (Annex

II & Annex III respectively) at the end of the report.

District wise summary of Marine & Estuarine Islands is presented in the following table (Table 3.7).

Table 3.7: District wise summary of Marine & Estuarine Islands

Sl

NoDistrict

Number

of

Islands

Island

Area

Sq km

Island

Area in

% of the

District

Area

District-

wise Island

Population

% of

District

Population

living in

Islands

No of

Households

in Islands

No of

Unprotected

Islands (By

Embankment

or Polder)

No of Protected

Islands (By

Embankment

or Polder)

No of

Cyclone

Shelters

No of

Cyclone

Shelters

per 10,000

Population

1 Bagerhat 6 264 7 16,760 1 767 6 0 0 0

2 Barguna 3 3 0 0 0 0 3 0 0 0

3 Bhola 18 1,587 79 1,587,248 93 265,044 15 3 65 0

4 Chittagong 4 413 10 326,499 5 57,934 2 2 144 4

5 Cox'S Bazar 4 393 19 363,280 21 63,660 2 2 112 3

6 Khulna 2 27 1 0 0 0 2 0 0 07 Lakshmipur 3 65 5 44,680 3 5,929 2 1 1 0

8 Noakhali 8 497 19 420,060 16 68,327 7 1 244 6

9 Patuakhali 20 895 36 311,284 21 58,210 15 5 137 4

10 Pirojpur 2 3 0 0 0 448 2 0 0 3

11 Satkhira 2 102 3 0 0 0 2 0 0 0

Total 72 4,248 15 3,069,811 13 520,319 58 14 703 2


28/36

18

A summary table (Table 3.8) of the Marine & Estuarine Islands is given below.

Table 3.8: Island summary table.

Sl.

NoName District

Area

Sq.Km

Forest

Area

sqkm

Land

Area

Sqkm

No. of

Population

No.of

Household

Pretection (By

Embankment

or Polder)

No. of

Cyclone

Shelter

1 Andar Char/ Prasann Patuakhali 8.86 0.30 8.56 3000 250 Unprotected 1

2 Bara Baisdia Patuakhali 67.05 8.47 58.58 17186 2813 Protected 9

3 Batmara Khulna 24.19 20.15 4.04 0 Unprotected 0

4 Bhasan Char Chittagong 14.03 0.00 14.03 18559 3534 Unprotected 0

5 Bhola Bhola 1297.04 4.24 1292.80 1476328 246354 Protected 40

6 Bhola Char Barguna 0.82 0.50 0.32 0 0 Unprotected 0

7 Bodnar Char Bhola 15.31 7.81 7.50 0 0 Unprotected 0

8 Chalita Bunia Patuakhali 30.63 8.36 22.27 3120 530 Unprotected 5

9 Chandnandi Noakhali 40.81 2.24 38.57 0 0 Unprotected 0

10 Char Abdullah Lakshmipur 1.20 0.00 1.20 0 0 Unprotected

11 Char Basonbhanga Bhola 9.24 4.64 4.60 0 0 Unprotected 0

12 Char Basson Bhola 8.26 4.87 3.39 0 0 Unprotected 0

13 Char Dhal Bhola 18.30 9.42 8.88 10000 700 Unprotected 0

14 Char Gajaria Lakshmipur 63.58 11.91 51.67 30000 1309 Unprotected 0

15 Char Gazi Lakshmipur 14680 2549 Protected 1

16 Char Gazipura Bhola 2.52 0.00 2.52 0 0 Unprotected 0

17 Char Gulishakhali Barguna 1.54 0.00 1.54 0 0 Unprotected 0

18 Char Hadi Patuakhali 29.55 9.73 19.82 600 100 Unprotected 1

19 Char Halim Patuakhali 18.76 0.00 18.76 535 107 Unprotected 0

20 Char Hare Patuakhali 5.49 1.98 3.51 124 12 Unprotected 0

21 Char Hassan Bhola 1.58 0.58 1.00 500 80 Unprotected 022 Char Islam Patuakhali 17.98 14.76 3.22 0 0 Unprotected 0

23 Char Jonak Noakhali 8.26 6.79 1.47 0 0 Unprotected 0

24 Char Kajal Patuakhali 168.02 8.24 1 59.78 31498 5000 Protected 12

25 Char Kasem Patuakhali 6.81 4.73 2.08 70 36 Unprotected 0

26 Char Krishnaprasad Bhola 3.53 1.41 2.12 2000 300 Unprotected 0

27 Char Kukri Mukri Bhola 48.90 23.49 25.41 21000 2500 Protected 0

28 Char Macher Patuakhali 0.72 0.00 0.72 0 0 Unprotected 0

29 Char Montaz Patuakhali 75.99 9.78 66.21 25000 6000 Protected 4

30 Char Nizam Bhola 3.42 1.26 2.16 3500 700 Unprotected 0

31 Char Nurul Islam Noakhali 0.48 0.40 0.08 0 0 Unprotected 0

32 Char Padma Bhola 12.59 0.00 12.59 2400 300 Unprotected 0

33 Char Pial Bhola 3.87 2.58 1.29 0 0 Unprotected 0

34 Char Shabaz Bhola 10.32 1.03 9.29 0 0 Unprotected 0

35 Char Tajul Islam Bhola 17.22 10.45 6.77 0 0 Unprotected 0

36 Char Tapashi Patuakhali 5.25 4.98 0.27 0 0 Unprotected 0

37 Char Tufania Patuakhali 1.37 0.44 0.93 30 2 Unprotected 0

38 Char Zahiruddin Bhola 10.96 4.66 6.30 7920 1550 Unprotected 339 Chhota Banglar Char Patuakhali 1.17 1.02 0.15 0 0 Unprotected 0

40 Dakshin Char Tapasi Patuakhali 2.12 1.21 0.91 0 0 Unprotected 0

41 Damar Char Noakhali 6.05 1.13 4.92 0 0 Unprotected 0

42 Dhal Char Noakhali 42.93 11.64 31.29 60 7 Unprotected 0

43 Dimer Char Bagerhat 2.60 1.46 1.14 0 0 Unprotected 0

44 Dubla Island Bagerhat 68.11 64.09 4.02 16400 700 Unprotected 0

45 Golkhali Patuakhali 0.76 0.70 0.06 0 0 Unprotected 0

46 Haldeburia Satkhira 72.90 71.79 1.11 0 0 Unprotected 0

47 Hatia Noakhali 355.12 24.91 330.21 400000 67820 Protected 237

48 Jahajjir Char Chittagong 78.85 18.51 60.34 0 0 Unprotected 3

49 Kachubaria Char Barguna 0.65 0.24 0.41 0 0 Unprotected 0

50 Kala Para Patuakhali 297.28 7.00 290.28 174921 31324 Protected 82

51 Kotkar Khot Bagerhat 23.25 20.35 2.90 60 12 Unprotected 0

52 Kutubdia Cox'S Bazar 69.43 0.00 69.43 106280 18360 Protected 82

53 Latar Char Bhola 6.99 3 .22 3.77 0 0 Unprotected 0

54 Majer Char Pirojpur 0.28 0.07 0.21 0 0 Unprotected

55 Majher Char Pirojpur 2.82 0.00 2.82 0 0 Unprotected 0

56 Mandarbaria Satkhira 29.19 28.33 0.86 0 0 Unprotected 0

57 Manpura Bhola 115.33 17.29 98.04 63600 12560 Protected 22

58 Moheskhali Cox'S Bazar 298.74 18.74 280.00 247000 43400 Protected 28

59 Narikel Baria Bagerhat 158.57 150.34 8.23 300 55 Unprotected 0

60 Nijhum Dwip Noakhali 39.68 16.88 22.80 20000 500 Unprotected 7

61 Pakhhir Char Bagerhat 2.96 0.43 2.53 0 0 Unprotected 0

62 Pater Char Bhola 1.17 0 .00 1.17 0 0 Unprotected 0

63 Putney Island Khulna 2.80 2.73 0.07 0 0 Unprotected 0

64 Rangabali Patuakhali 136.88 22.97 1 13.91 55000 12000 Protected 23

65 Rupar Char Patuakhali 0.70 0.16 0.54 0 0 Unprotected 0

66 Saint Martin Cox'S Bazar 4.02 0.00 4.02 6500 1200 Unprotected 2

67 Sandwip Chittagong 224.41 4.94 219.47 292940 50900 Protected 134

68 Shahebaner Char Noakhali 4.12 4.03 0.09 0 0 Unprotected 0

69 Sonadia Cox'S Bazar 20.82 2.26 18.56 3500 700 Unprotected 0

70 Sonar Char Patuakhali 19.31 15.82 3.49 200 36 Unprotected 0

71 Tear Char Bagerhat 8.20 6.99 1.21 0 0 Unprotected 0

72 Urir Char Chittagong 95.74 12.00 83.74 15000 3500 Protected 7


29/36

19

Chapter 4

Information System

4.1 ObjectivesThe overall objective of the Coastal Island and Char Information System (CIIS) is to facilitate the

planner, and other users who are involved in the process of development of Integrated Coastal Zone

Management Plan of Bangladesh through investigating the condition of the coastal islands and chars.

It has designed to support the management of decisions, to aide in the analysis and evaluation of

existing conditions and to assist in decision support. This ability of quickly and thoroughly analysing

any aspects of islands is invaluable in the constant attempt to increase the socio-economical and

ecological condition of the coast.

CIIS is a structured way of storing, accessing as well as organizing information in order to increase

the efficiency and effectiveness of the integrated planning process as operational tool for following

functions:

- Planning- Implementation

This system associated with database has been made simple and open in order to accelerate the

accessibility to information. The CIIS can be distributed or replicated for different users. This is a

simple system to use that does not require any map handling capability. People from managers to

general users can use this system.

4.2 Directory structureThe directory structure of the CIIS is following:

Let CIIS root directory isROOT_DIR = C:\Island, The rest of the directory is relative to this root

directory.

The main executable file:ROOT_DIR\ Island.exe

Island information data file: ROOT_DIR\ Island.mdb

An installer is prepared for CIIS installation. There are two main installation file a) Main setup exefile b) cab file: contain the all installation file. Click on the setup file, a destination directory will be

asked. Enter a destination directory name for example: C:\Island.

4.3 Working with Application4.3.1 CIIS organization

CIIS has following interfaces:

a) Introductionb) Map Viewer


30/36

20

Introduction

The introduction is for giving a preface of the CIIS. It is the gateway to the main interface named as

Map Viewer. (Figure 5.1)

Figure 5.1: Introduction Page

Map viewer

The Map Viewer (Figure 5.2) is developed to facilitate user to view, search, classify and print the data

as well as map. Map viewer has a map view area where an user can view, search, print, setting labels.

Maps stored in users computer in digital format. Map viewer support different GIS file format suchas ESRI shape file, NT coverage, Grid, Images file format etc. One can add or remove layers in the

map viewer.

Figure 5.2: The main page of the CIIS

The page can be divided into 2 sections. The section at the left shows the Island and Char information

extracted from the database. The information has been kept according to the 19 districts of the coastalIslands. By selecting a district one can see the list of the Islands and chars located in that district. The


31/36

21

map viewer will show the map of the selected district and will respond instantly with any change. An

Island and Char will be highlighted and located in the middle of the map viewer pan when it is

selected. The scale will appear at the left bottom corner of the window.

The toolbar is in the right side of the map viewer pan. The toolbar consists of 9 different useful tools.

(Figure 5.3)

Figure 5.3: Tools in the toolbar

Zoom In, Zoom Out

To Zoom in, click on Zoom In icon from tool bar. The mouse icon will be changed to glass icon.

Now click on map area and draw a rectangle, map will be zoom in to this extent of the rectangle area.

To zoom out click on Zoom Out icon from the toolbar now click on the map view area, the map will

be zoomed out in certain extent.

Pan

Some times displayed Maps are zoom in such a level that viewing maps are bigger then map area. To

display the hidden part of the map user has to move the map in desired direction this is called pan. To

pan a map, click on Pan icon from toolbar the mouse icon will be changed to hand icon. Click on

map view area and drag the map in desired direction, the whole map will be moved in that direction.

Full extent

The maps may be displayed in any zoom level. Display map to its maximum extent of the layer is

called full extent. To full extent of the map, click on full extent icon from toolbar. The map will be

displayed in full extents.

Map Tips

To show data in the map as a tip Map tips is developed. Island and Char name is set to display in

the map. Moving mouse on the map in map view area, Island and Char name will be displayed.

Labeler

To label the map one of the data layers that is District or Island and Char will be selected from the

drop down list. Then by clicking on Labeler icon from toolbar the map can be labeled. Added

labels can be removed by clicking on the Remove Labelbutton.

Zoom In

Zoom Out

Identifier

Labeler

Full Extent

Pointer

Find

Add TextPan


32/36

22

Find

This tool is for searching an Island and Char by its name. Upon clicking on Findicon an window

will appear allowing the user to enter their desired Island and Char. To put the name of the Island and

Char the sentence case format i.e., Putney Island has to be followed (Figure 5.4).

Figure 5.4: Find Result

Searched Island and Char, if exists, will appear in the middle of the map viewer pan and will be

highlighted.

Add Text

Besides the labeler tool there is another tool in the toolbar by which one can add any type of text. Thetext can be added in any places chosen by the user by clicking on the map viewer with the Add Test

toolbar. Added texts can be removed by clicking on the Clear Textbutton.

Pointer

To switch within the toolbars a pointer can be used which will change the icon to an arrow.

Attribute data

The characteristic of a geographic feature (spatial data) described by numbers or characters, typically

stored in tabular format, and linked to the feature. For example attributes of an Island and Char

contains Island Name, District, Upazila/ Thana, Union, Mauza, Administrative Identity, Safety,

Location, Latitude, Longitude, Area (Sq Km), Population, Household, Resources, Agriculture,Fisheries, Forest, Live Stock, Occupation, Education, Communication, Other Infrastructure, Drinking

Water, NGOs, Other Information, Development Opportunities, Problem & Constraints and Source. To

show the attribute data of a spatial data (map), one has to double click on an Island and Char in the

list. The attribute data will be showed in the separate window (Figure 5.5). One can copy any of the

fields or select all the fields to copy. For easy editing the copy items should be pasted in MS Excel.


33/36

23

Figure 5.5: Attribute Information

Identify Result

Each data layer in map view area has a table, storing attributes about the geographic features it

contains. A data layers attribute table contains one record for each feature in the map view area. The

Identify tool lets user display the attributes of the features on a Map view area by clicking on them

with the mouse. Choose the Identify icon from toolbarand click on any feature in the data layer on

map view area to display its attributes (Figure 5.6). Attributes of the layer located at the mouse points

are displayed.

Figure 5.6: Identify Result


34/36

24

4.3.2 Copy and Export Map

The whole map or any of the parts of the map with any added information can be copied in the

clipboard or can be export as .bmp format for using in the report of any other printing purpose.

4.3.3 Labeling and classifying facilities

By double clicking on the layer appeared on the add panel one can change the shape, size and colour

of the symbol. The layers can be arranged by dragging up and down. One can classy the islands on the

basis of the attribute fields like inland class or sources used to identify and locate the islands. The

facilities are given in different panels (Figure 5.7), which are:

Single: for displaying all the features in a layer with the same symbol

Unique: For displaying features by applying a symbol to each unique value to a specified field

Classes: For applying different symbols to a set of discrete values

Labels: For drawing text for a specified field

Figure 5.7: Symbol Properties


35/36

25

Chapter 5

Conclusions

For this study an operational criteria based on different tidal levels stated in the report of the MeghnaEstuary Study was used. It was not possible to find out any established criteria to demarcate the

estuarine, marine and riverine zones. This criteria can be applied only for the Meghna estuary study

area and for the rest of the coastal area the landline has been followed.

The classification of islands and chars has been done on the basis of physical separation of islands and

chars from the mainland. It is difficult to come up with a figure which exactly indicates the number of

total islands or chars in coastal zone of Bangladesh.

There are significant number of already developed areas in the coastal zone which contain, in most

cases, the word char with its name. This is due to their previous location as char or island. Although

these areas are fully attached to the main land, the physical, socio-economical, environmental

condition and infrastructure developments of these areas are rather similar to chars condition. In theplanning process these areas are considered in different way in comparison to other mainlands and

therefore needs to be located as chars. These categories mostly were grouped in the Chars attached

with mainland classes.

IRS-P6 LISS III image of 2005 is the most recent among the sources used in this study. Therefore this

inventory could be considered as the latest inventory of the islands and chars of the coastal area. There

is less possibility of occurrence of inclusion and exclusion of the island and chars. All the possible

islands and chars exists in the satellite images and in the reports have been attempted to identify.

Further it would be possible to accommodate any newly developed criteria for identifying and

classifying the islands and chars in this inventory.


36/36

References

http://www.bangladeshgov.org/mod/sob/sobweb.htm

Hydro-morphological dynamics of the Meghna Estuary, MESII, July 2001

Inventory report on char lands in southwest coastal region of Bangladesh, CDP

Map Object Technical Guide

NWRD technical Notes and Metadata

PDO-ICZMP paper no. 06: Inventory of Coastal and Estuarine Islands & Chars

Sundarbans Reserved Forests, Department of Forestry, 1995

Documents

g Water Island