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TOPOGRAPHIC DATABASE CREATION

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BD Topo project for creation of a topographic data base on the territory of France was the main production project of Racurs in 2005. [i][b]Main technical characteristics:[/b][/i] [img]http://www.racurs.ru/img0/bullet.gif[/img] Input images scale: 1:25000 [img]http://www.racurs.ru/img0/bullet.gif[/img] Camera: F=153.972 mm [img]http://www.racurs.ru/img0/bullet.gif[/img] Scanning resolution: 28 mkm [img]http://www.racurs.ru/img0/bullet.gif[/img] Code table including 133 codes [img]http://www.racurs.ru/img0/bullet.gif[/img] Required accuracy: 1 m (for 3D vectorization) 4]!`5n ROe*j'a
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Racurs has processed LOT 1 and LOT 2. Twenty five blocks with the total area ~ 25000 km2 (or ~ 4.5% of the France’s territory) Alltogether over 40 operators were trained and engaged in the project. [i][b]Specific features of the 3D vectorization:[/b][/i] [img]http://www.racurs.ru/img0/bullet.gif[/img] High accuracy requirements [img]http://www.racurs.ru/img0/bullet.gif[/img] Necessity to work in 1:3, 1:4 zoom levels [img]http://www.racurs.ru/img0/bullet.gif[/img] Interpretation complexity: many codes; lack of field survey; specific requirements for topology, etc. [img]http://www.racurs.ru/img0/bullet.gif[/img] Time frames [img]http://www.racurs.ru/img0/bullet.gif[/img] Strict requirements and formalism in quality control [img]http://www.racurs.ru/img0/bullet.gif[/img] Continuous work with raster map. r&JMe`*S5E1t"|B

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