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upv_spot_height_generalization [2017/03/30 19:49] efox created |
upv_spot_height_generalization [2017/03/31 10:11] (current) efox |
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* automatizovaná tvorba a generalizace kótovaných bodů | * automatizovaná tvorba a generalizace kótovaných bodů | ||
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+ | * co je master database? | ||
+ | * __hiearchical classification__ | ||
+ | * **special interest points** | ||
+ | * defined by data producer | ||
+ | * related with map names (vyhledává do v databázi) | ||
+ | * **geomorphologic interesting points** | ||
+ | * terrain points - peaks, mountain passes, depressions | ||
+ | * kategorizace: | ||
+ | * they didnt use DEM but TIN, because of some difficulties to this methodology | ||
+ | * One is that the centre of a pixel in raster data can not be coincident with the exact position of the spot height and the location of the pixel containing the spot height is unclear | ||
+ | * in raster format, each pixel of the DEM must be analyzed, while when using a DEM in TIN format, the analysis can be specifically restricted to the spot heights. Therefore, the use of a DEM in TIN format reduces substantially the computation time | ||
+ | * peaks: | ||
+ | * bud podle vyhledávací oblasti, hledám nejvyšší bod | ||
+ | * nebo podle tvaru Base Contour Line (je nemenší vrstevnice, obsahující jeden vrchol) | ||
+ | * deprese: | ||
+ | * podle minimálního souseda | ||
+ | * **remainder points** | ||
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+ | * There must be a spot height approximately every 1200 meters on the roads | ||
+ | * The input spot heights placed on the intersection of roads are considered as preferred spot heights | ||
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+ | ----------- | ||
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+ | * simplification, | ||
+ | * geodetic points, | ||
+ | * points located in crossroads, | ||
+ | * points in urban areas, and | ||
+ | * points near roads, near generic toponyms and near places of touristic interest (like monuments, ruins, viewpoints, springs, etc.). | ||
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