Determination of Spot Heights of the University of Lagos Campus Omogunloye O.G.

Department of Surveying and Geoinformatics,
University of Lagos, Akoka, Yaba, Lagos, Nigeria.
E-mail: gabolushohan@yahoo.com

ABSTRACT

To obtain the relief of a particular geographical area, the horizontal and vertical coordinates of the area are required. These coordinates can be obtained through various surveying techniques. This project deals with the determination of Spot Heights of the University of Lagos Campus, using Differential Global Positioning System (DGPS). The knowledge of the topography of an area gives planners and engineers the panacea to properly manage and develop old and new man made feature. The need of this project is to produce map of University of Lagos showing the relief pattern of the entire campus and also to show or identify areas of minimum
and maximum elevations within the campus vicinity. In order to accomplish the aim of this study, the use of both field observation and remote sensing methods were adopted to acquire data. The measurements of horizontal and vertical coordinates of all stations using Promark 3 Differential Global Positioning System (DGPS) equipment was combined with satellite imagery
which was used to create spot heights, contour map, digital terrain model and topographic map of the entire campus. The data obtained are processed using the following software ArcGIS, Surfer 8, Global Mapper, GNSS Solutions and Excel Spreadsheet. The data processed and the results of analysis done can be seen in form of maps, Digital Terrain Model, tables, bar charts and pie charts. The results obtained can be used for both engineering and tourism purposes, cut and fill calculation, development of new structures and identifications of areas that are liable to flooding.