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Question #5559

map2map

Added by Stepan Tulyakov 5 months ago. Updated 5 months ago.

Status:
Resolved
Priority:
Normal
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Category:
Applications
Target version:
-
Software Version:
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Description

Hello,

Does map2map automatically change the datum of DEMs, when used with matchmap=True.

For example, if I run
map2map from=DEM_with_areoid_datum.cub map=DEM_with_ellipsoid_datum.cub to=matched_DEM.cub matchmap=True
will match_DEM.cub have elevations relative to the ellipsoid?

History

#1 Updated by Stuart Sides 5 months ago

  • Category set to Applications
  • Status changed from New to Resolved
  • Assignee set to Stuart Sides

Stepan, If you are asking if map2map modifies the DN values in the DEM to match the MAP, then the answer is no it does not. "map2map" does not know the DNs are elevations.

map2map process in a nutshell:
For each pixel in the output
what is the lat/lon at that output pixel
what is the input samp/line for that lat/lon
transfer the DN at the input samp/line to the current output pixel

The only change to the DN would be by the interpolation scheme used.

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