Journal of
Geography and Regional Planning

  • Abbreviation: J. Geogr. Reg. Plann.
  • Language: English
  • ISSN: 2070-1845
  • DOI: 10.5897/JGRP
  • Start Year: 2008
  • Published Articles: 394

Full Length Research Paper

Mapping as a complement of statistical/graphical approach to climate data analysis: Example from rainfall variability over the western Nigeria

A. O. Eludoyin1*, O. M. Akinbode2, M. A. Oyinloye3, A. Fadejin4
  1Department of Geography, Obafemi Awolowo University, Ile-Ife, Nigeria. 2Department of Geography and Planning Sciences, Adekunle Ajasin University, Akungba-Akoko,Nigeria. 3Department of Urban and Regional Planning, Federal University of Technology, Akure, Nigeria. 4Department of Geography, University of Ibadan, Nigeria.
Email: [email protected]

  •  Accepted: 17 March 2009
  •  Published: 31 May 2009



The challenge of insufficient network of meteorological data collection centre has been an age old problem in Africa. It is therefore necessary to encourage a technique that will ensure that data are generated for areas without them. This study is in this regard. 20 years rainfall data were collected from 5 stations in the Western region of Nigeria and analyses were carried out to detect the monthly variations in 2 decades (1985 - 1995 and 1995 - 2004). The study made use of geographic information system (GIS)’s mapping procedure and graphical methods to illustrate that mapping effectively complements the graphical/statistical method, apart from showing spatial distribution, values can be generated for areas without such data. The various maps can also be overlaid in a GIS environment to determine causes and effect of what is being studied among others. The study concluded that mapping could easily complement statistical/graphical approach to studies in spatial science, especially in modeling and data management.


Key words: GIS mapping, monthly and spatial variability, climate data, Western Nigeria.