Abstract:
The Federal Government of Nigeria through the Office of the Surveyor General of the
Federation (OSGOF) has set up a surveying infrastructure throughout the country known as
the Continuously Operating Reference Stations (CORS); to replace the traditional
geodeticpassive networks which are the basic infrastructure for Surveying and Mapping in
anycountry. Using the United States of America’s CORS map stations as a standard, having
in mind the National Geodetic Survey’s (NGS) guiding principle for establishing new CORS
which states that “proposed CORS will be no closer than 70km from an existing CORS”,
hence, the spatial coverage of theNigerian GNSSreference network (NIGNET) on a distance
of more than 300km in between the stationsseems insufficient based on the globalstation
densification standard of the International Terrestrial Reference Frame (ITRF) adopted by the
Global Geodetic Reference Frame (GGRF). The aim of this study is to develop a suitability
map for CORS network in South West Nigeria with a view of assessing the level of
compliance of the existing CORS network towards improving the density of the CORS
network thereby extending the spatial coverage with a robust network. The data used for this
study were secondary data and from different sources. The study was carried out in GIS
environment using weight and overlay method with AHP technique. Result from the
suitability revealed that, about 70% of the study area is suitable for the establishment of new
CORS network. Therefore, the information derived through this study will be of help to
policy makers for effective decision making and sustainable development
