DIGITAL WORKING BASE MAP PRODUCTION FOR THE GLOBAL SUSTAINABLE 
CITIES PROGRAMME: THE CASE OF 
SUSTAINABLE IBADAN PROJECT IN NIGERIA 
J. A. Ogunlami, 
Director 
E. Amamoo-Otchere, 
Head, Remote Sensing Applications Unit 
P. M. Kibora, 
Cartographer 
Regional Centre for Training in Aerospace Surveys (RECTAS) 
P.M.B. 5545, Ile-Ife, Nigeria. 
C. O. Nuga 
Niger Surveys, Ibadan, Nigeria. 
WG VII/9 - Human Settlements 
KEY WORDS: Remote Sensing, Cartography, Human Settlements, Digitizing, Updating 
ABSTRACT 
Since the beginning of the decade, the World Bank has rapidly expanded its environmental and urban activities to 
address its Brown Agenda, and this change has been motivated by a paradigm shift manifested in the Bank's 
projects and programmes. The Bank, together with the United Nations Centre for Human Settlements (UNCHS) 
Habitat, the World Health Organization (WHO) and with support from the United Nations Development 
Programme (UNDP), have launched an Urban Management Programme (UMP) the principal goal of which is to 
provide planners and managers with improved capability to deal with the challenges of sustainable urban 
development. The operational arm of the UMP is the Sustainable Cities Programme (SCP), which currently is 
being actualised in twelve cities throughout the world, with Ibadan as the representative demonstration city project 
for Nigeria. The Ibadan project is known as Sustainable Ibadan Project (SIP). 
There is an environmental component of the SCP which requires the use of a geographical information system 
(GIS) as a management tool. An essential requirement of the GIS is a digital working base map for the urban 
information system. In the case of the SIP, the Regional Centre for Training in Aerospace Surveys (RECTAS) 
was consulted to carry out a map survey situation of Ibadan and then compile a special up-to-date edition at two 
scales: 1:50,000 and 1:25,000. It was also to produce a digital map. To execute the job, RECTAS conducted a 
map survey of Ibadan for the selection from the existing ones the most appropriate base for the revision. The 
base maps selected had obvious gaps of both spatial and temporal information. To update them, SPOT satellite 
data in Panchromatic and Multispectral modes, were utilised. The SPOT data were digitally processed, printed in 
sub-scenes, and mosaicked at RECTAS. Similarly the interpretation and extraction as well as the transfer of the 
relevant information and the map drafting activities were achieved at RECTAS. Together with the Niger Surveys 
and consultants, the digital production was undertaken using the latter’s ARC/INFO software. This presentation is 
on the processes used for the revision, production of the working base map, and the digitisation of the layers. 
18 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996 
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