upv_spot_height_generalization [Wiki GIS/KGI UPOL]

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upv_spot_height_generalization

automatizovaná tvorba a generalizace kótovaných bodů

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: conic, assymetrical, open, closed
  - 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

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

simplification,amalgamation, exaggeration, collapse, displacement
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.).

Permalink upv_spot_height_generalization.txt · Last modified: 2017/03/31 10:11 by efox

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