Mapping Physical Development Changes in Lagos Island Local Government Area of Lagos State Using Geospatial Techniques

Abstract

The scope of the research work comprised the planning and preliminary data requirement analyses, acquisition of preliminary data such as base map, data processing and database creation process, GIS implementation using linear referencing, map creation and analyses of data as well as the presentation of results. The aim of this research is to produce a new and updated map of the study area and document changes that have occurred over time. The objectives therefore includes; obtaining an older map of Lagos Island and update its features, obtaining the GPS coordinates within the study area for geo-referencing, analyzing the land use patterns for the study area, producing a new map in a Geospatial Information System Environment and analyzing the social-economic activities within the study area. The study area of this research is <i>Lagos Island Local Government Area</i>, in Lagos State, Nigeria. It is located in the South-western part of Lagos. The Study area is Located to the extreme south of Lagos, within the latitude 6°22′- 6°25′N and Longitude 3°25′E around Atlas Cove Depot and Jetty. Methodologically, this study employed field studies where equipments such as Garmin GPS MAP 62 (Series), Data storage, manipulation and retrieval hardwares were deployed. GIS operations were carried out using softwares such ArcGIS 10.8, AutoCAD 2007 for drafting, GoogleEarth-4.2 pro Application, Microsoft Excel 2007 for the storage of easting and northing (x, y) values, for all segment points and points of interest in the study area ArcGIS 10.8 software was used for Dynamic segmentation process and GIS analysis involving spatial analysis and search while Microsoft Word 2007 was used for documentation. The result showed new spatial features such as reclaimed wet lands, new roads, buildings and social amenities located in the updated map. Finally the study by demonstrating the capacity of the use GIS and remote sensing techniques for updating of maps.