Research Article

Topographic Map Update of Esan Central LGA, Edo State, Nigeria, Using SPOT-5 and ASTER LiDAR Data

S. O. Ogedegbe1*
1 Department of Geography, College of Education Igueben, Edo State, Nigeria
* Corresponding author: betstev@yahoo.com
Published: Oct, 2014
DOI: 10.54222/jgst.2014.vpweaoij
Pages: 52-69
Views: 12
Downloads: 1

Abstract

This study examines the effectiveness and accuracy of SPOT-5 and ASTER LiDAR data satellite images, Global Positioning System (GPS), Digital Terrain Model (DTM), and Geographic Information System (GIS) in carrying out a revision of Nigerian topographic maps at the scale of 1:50,000. The data for the study were collected by extraction of relevant spatial data from the 1964 topographic map, delineation and interpretation of 2009 SPOT-5 data, and field surveys. The landscape changes extracted from SPOT- 5 were used to update the topographic base map and to determine the nature and direction of changes that have taken place in the study area. The findings revealed that changes have occurred in both cultural and relief features over time. The coefficient of correlation and t-test was calculated to show that changes in point, linear and areal features are significant. Also significant were the planh11etric and height accuracies of the revised map. The study shows that satellite data especially SPOT-5 is useful for the revision of topographic maps at scales of 1:50,000 and even larger. And, high-resolution remote sensing at Sm and ASTER data (30m) with GPS (±1.9m) can be used to c.reate a digital elevation model (DEM) on the map which is an essential dataset for complete revision.

Keywords

Topography Map Update Map Revision SPOT-5 ASTER LiDAR

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How to Cite

Ogedegbe, S. O. (2014). Topographic Map Update of Esan Central LGA, Edo State, Nigeria, Using SPOT-5 and ASTER LiDAR Data. Journal of Geospatial Science and Technology, 1(1), 52-69. https://doi.org/10.54222/jgst.2014.vpweaoij

S. O. Ogedegbe, "Topographic Map Update of Esan Central LGA, Edo State, Nigeria, Using SPOT-5 and ASTER LiDAR Data," Journal of Geospatial Science and Technology, vol. 1, no. 1, pp. 52-69, October 2014. doi: 10.54222/jgst.2014.vpweaoij

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