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GIS and Census Mapping - The Cape Verde experience in the use of
GIS technologies in the 2010 Census
Nairobi, Kenya, 14-17, September, 2010
Regional Seminar on Dissemination and Spatial Analysis of Census Data
Presented by Leonilde Lima
Summary
• INE - GIS Infrastructure
– 2010 Census Mapping
– Dissemination• Dissemination Strategy• Objectives
– Web Dissemination• Objectives• Products • Services• Users• Data Contents
GIS Infrastructure
• Support the production and the dissemination of data. • Statistics Production:
– Geo referencing all statistical information;– Map Supply
• Dissemination:– Include the geographical component in all dissemination
products
• Studies– Using spatial analysis tools
Technology
Data Source
Browser
Web Server
Application Server
Spatial Server
Internet
Server
Client
2010 Census Mapping
- June 16 – 10, 2010
- Electronic questionnaires - PDA
- “Everyone counts, we count with everyone”
Step 01-Digitalization of the 2000 Enumeration Areas and Buildings
Step 01-Digitalization of the 2000 Enumeration Areas and Buildings
GeoCode
5 1 2 001 0023
Island
Concelho
Freguesia
EA
Point/Building
Step 2 – Pre Census/Census cartogtraphy preparation
Map Productions and Printing
PDA projects - 561 Enumeration areas (2000 boundaries)
ImageEA boundary Buildings
Step 03 - Census Cartographic database
• Correction and stabilization
– Not valid points,
– Inconsistent limits,• Urbanization• …
Step 04- Delimitation of the 2010 enumeration areas
• 150 / 180 households for urban / rural areas
Step 05- Field confirmation and DR boundary descriptions
FICHA 1 – Descrição do limite do
DR………|0|0|1|
Ilha: Boavista |5| Concelho: Boavista |5|1| Freguesia: Santa Isabel|5|1|2
Descrição do limite do DR
Ponto inicial: Porto Sal-Rei Do ponto inicial, Porto de Sal-Rei, percorre-se a estrada do porto até ao cruzamento com a
estrada Praia Cabral. Uma vez aqui vira-se à direita subindo a estrada e passando pelo
Father&Son Propriety Chegada ao topo vira-se à esquerda na Delegação do Ministério de
Educação seguindo em direcção à Igreja do Nazareno (Av. Dos Emigrantes) passando por
Extra carnes e vira-se à direita contornando a praceta (Rua de Caboco) seguindo em frente.
Depois atravessa uma rua e vira à direita na Botique Djena. Segue em frente passa pelo Bar
Silva, vira à esquerda na primeira rua, passando pelo Bar Marítimo, Rua da Cruz, Rua Santa
Bárbara e vira-se à direita (Av. Dos pescadores) até à orla marítima contornando a orla até ao
ponto inicial (Porto de Sal-Rei).
Bairro: Riba D’Olte Feito por: Maria Sapinho Pires
Step 06 – Pilot census and Census preparation
Map Productions and Printing
PDA projects – 949 Enumerations Areas (2010 boundaries)
– New Images
– New EA limits
– New buildings
Step 07- Census geographic database
• Correction and stabilization– December 2010
• Step 08 – Map Dissemination (Static) - June 2011
• Step 09 – SIG INE (Dinamic)- December 2011
Ressources
• Softwares
– Geobase– Arcview– ArcGis– Global Mapper– IBGE Mobile GIS
Ressources
• Hardware
– PC’s– 1 Plotter– 3 - A3 Printers– PDA’s
Ressources
• Liveware / People
– 8 technicians (Geography, Cartography, Statistics, Technology).
– Computer operators
– Field operations staff
Ressources
• Others
– Aerial photography – Municipalities 1:2000 urban level 1:10 000 rural level
– Satellite Imagery – Google earth
– Others institutions
The
dissemination of the 2000 census results, had been limited to tables and reports.
Product/Service
Format in which product/service
available
Press release
Tabulated data
Preliminary results Paper
Final results Paper / internet / CD
Results by smallest geographic unit
Paper / CD
Posters, brochures, etc. Paper
Analytical and thematic statistical reports
Paper / Internet
Customized data requests Internet / INE
Census History - Dissemination
2010 - Dissemination Strategy
• Good practices from 2000 (CD, paper, ateliers, folders, reports,…)
• Easy the access to information – Free access to all census data, including
geographic data• Make the internet the core dissemination vehicle
• Enable advanced users to directly handle the information.
Promote statistical literacy, data awareness and usefulness, as a basic support instrument for the formulations and
decisions on public policies and private businesses.
Objective
• Target– Advanced users
• GIS Specialists
– Active Users• Others specialists with knowhow in GIS
– Ordinary Users
Dissemination via Web
Dissemination via Web
• Products– Static Information
• Thematic maps• Census Atlas• …
– Format• PDF, GIF, JPEG, …
• Products– interactive Information
• online map Production
• online Atlas
Dissemination via Web
• Contents– Detail level – The lowest possible having into
account confidentiality issues
• Administrative Division– Country– Island - Ilha– Concelho– Freguesia– Cidade/Vila/Zona– Bairro / Lugar
Dissemination via Web
Territorial's units
• Statistics divisions– EA’s
• Basic mapping data– Public utilities– Roads
• Others– Agricultural regions– Touristics zones
Tools
• Census Info• Alov Map• Redatam / IMIS• CSpro• PC Axis / PX Map• Customized • ArcGIS/ArcServer
