City models
City model is a medium to high resolution database for use in detailed and accurate network design in urban environment. City model dataset consists of up-to-date and highly accurate terrain (DTM/DEM), clutter, vectors, text labels, orthoimagery. All layers can be customized according to client’s needs. City surroundings and satellite towns can be added to city model. Option 1. Improved city modelThe sources are: • Topographic maps with scale 1:10 000 or 1:25 000 • Satellite images: IRS, SPOT with 5-6 m resolution, IKONOS or QuickBird with 1 m resolution (for densely populated areas) The cell size of data model is 10 x 10 m or 20 х 20 m Option 2. Standard city model The sources are: • Topographic maps with scale 1:50 000 • Satellite images: IRS, SPOT with 5-6 m resolution The cell size of data model is 20 х 20 m
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