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Accuracy Assessment of Geoeye-1 Satellite Images for Updating Large-Scale Maps in Iran

Momeni E, Fard FSN and Haghi H

Urban planners and decision-makers always demand the most updated maps in order to model urban dynamics and make an optimized plan for the city. Conventional mapping techniques in Iran are still based on the use of traditional panchromatic aerial photos. Keeping maps up-to-date is a challenge for National Cartographic Center, as the main producer of maps in Iran. This paper examines the ability of GeoEye-1 high-resolution satellite images to update large-scale topographic maps of Iran considering Iranian national mapping standards. Extractable urban features from GeoEye-1 images and their geometric accuracy were studied and compared with aerial photos. The study found GeoEye-1 images as a practical alternative for aerial photogrammetry for updating large-scale topographic maps in Iran. Maps at a scale of 1:3,000 with 1 m contour interval can be extracted from GeoEye-1 images based on Iranian standards. Also, the study found that cost of map updating using GeoEye-1 images is less than the cost of map updating using conventional aerial photogrammetry.