TITLE: OPTIMAL

LOCATION OF CLOSED

CIRCUIT TELEVISION

(CCTV): CASE STUDY-

NAIROBI CBD

NAME: ABUGA DUNCAN OYAGI

REG. NO: F19/1458/2010

SUPERVISOR: DR. D N SIRIBA

Outline

Background

Problem Statement

Objectives

Methodology

Results and Analysis

Conclusion

Recommendations

Background

Increased use of CCTVs for surveillance and traffic monitoring.

Location of the CCTVs is key in determining the amount and type

data collected i.e. images and videos

Problem statement

Closed Circuit Television cameras are increasingly being used in the prevention of crime and also recording criminal activities and surveillance in many public areas.

The acquisition and installation of CCTVs is very expensive hence it is critical to determine the most suitable place to locate and install them in order to enable maximum acquisition of information.

Objectives

Main Objective

1. To determination of optimal locations to install CCTV cameras within the Nairobi Central Business District

2. To determine if the installed cameras are optimally located.

Specific Objectives

Specific Objectives

1. To develop an optimal CCTV camera

locations model.

2. To construct a 3D model of the Nairobi

CBD to be used in geovisualization of

optimal location of CCTV cameras.

3. To perform a viewshed analysis to

determine viewing range of cameras.

Key Variables for optimal CCTV location

Hotspots Traffic Car Parks

Data Collection

Coordinate System

Data formats

Database Creation

Data Harmonization

Optimal Location

Data Analysis 3D modellingOptimal location model

View shed analysis

METHODOLOGY

Results and Analysis

Optimal CCTV locations.

3D model and CCTV locations.

Check using installed cameras.

Viewshed analysis and blind spot

identification.

Optimal CCTV locations

3D model of Nairobi CBD and optimal

CCTV camera locations.

Specific Objectives

To develop a 3D model of the Nairobi

CBD to be used in optimal location of

CCTV cameras.

To model optimal CCTV camera locations

processes using the identified variables.

To check if the installed CCTV cameras

are optimally located

To perform a viewshed analysis to

determine how far and wide the cameras

can view and to detect any blind spots.Using 3D model to enhance geovisualization and spatial

relationship between optimal locations and neighbouring features.

Camera’s viewing range and its ground

position.

Installed CCTV cameras that are within

the generated optimal locations for

CCTV installation.

Viewshed analysis showing visible and non

visible areas from various camera positions

Conclusion

The objectives of the research were

accomplished.

Optimal locations for CCTV installation were

generated by the model.

The locations which are strategic for installing

CCTVs within Nairobi CBD was arrived at after

merging the optimal CCTV locations for crime,

traffic and car parks.

3D model improves geovisualization in

determining optimal location of CCTV cameras.

11 out of the 26 i.e. (42.31%) CCTV cameras

already installed were within 30 metres from the

generated optimal locations.

Recommendations

Use of GIS in determining optimal locations

for CCTV camera installations.

Vector and raster data to be used when

determining CCTV locations.

Data on existing CCTVs to be made

available.

Interface should be developed independent

of ArcGIS for incorporating data in the

model and executing it.

The End