keywords: Road, Network, Extraction, Satellite, Image
The advent of high resolution satellite imageries has paved way for easy and faster approach in map updating and production. This study was aimed at extracting road network from high resolution Google Earth satellite imagery of Wuse District, Abuja using manual on-screen digitization. Data for the study was acquired from Google earth with the aid of Universal Map Downloader and Global Mapper. ArcGIS 10.8 software was used for further analysis. Twenty (20) ground control points were acquired on the field using a hand-held Global Positioning System (GPS) of notable intersections for accuracy assessment. Root Mean Square Error (RMSE) was used to assess the accuracy of the features extracted from the high resolution satellite image. The results revealed that the major and minor roads have a total length of 58.284km / 152,174km which is 27.69% / 72.31% of the total road network. The result of accuracy assessment revealed 0.507 of RMSE implying high level of accuracy of the work. This study concludes that high resolution satellite imageries can provide an easy and effective means of updating road network map. This study recommends that the Federal and State Ministry of Transportation should explore the availability of high resolution satellite imageries to produce and update road network maps for effective road transport management.