Modelling catchment area of economic activity using GIS-based Huff Gravity Model: A case of Edo State, Nigeria

  • Olanrewaju Lawal 1Department of Geography & Environmental Mgmt., Faculty of Social Sciences, University of Port Harcourt, Nigeria
  • Okey Onuchuku Department of Economics, Faculty of Social Sciences, University of Port Harcourt, Nigeria
Keywords: Internal market, GIS, Economic Catchment Area, Huff Gravity Model, Spatial Interaction, Geographic Proximity


The need for rapid economic development to match increasing population in Nigeria cannot be overemphasised. For this need to be met, it is pertinent that resources in each state and region of the country are efficiently and effectively utilised to maximise return on investments. Thus, it is necessary to identify the catchment area of the current markets to provide an understanding of the market structure which exists at different scales. This study utilised a Geographic Information System (GIS) -based Huff Gravity model to identify the economic catchment areas of major centres. Results show that 13 out of the 14 centres attracted nearby subregions (SRs). The top 7 centres identified accounted for 86% of the potential economic activities. There is a tendency for limited spatial interaction for some SRs in the south in contrast to northern SRs. In conclusion, there is more competition for economic activities among centres in the northern part with the potential to create some winners and losers. Therefore, place-based policies which can enhance economic development across all regions are necessary.


Journal Identifiers

print ISSN: 0855-9414