[GRASS-user] SRTM interpolation to sub-meter
neteler at itc.it
Fri Jun 23 02:48:20 EDT 2006
maning sambale wrote on 06/22/2006 06:41 PM:
> I have a SRTM DEM data from CGIAR (http://srtm.csi.cgiar.org/). I'm
> trying to do local sea-level rise modelling.
Note that there is SRTM Version 2 out - with improvements. AFAIK
SRTM DEM data from CGIAR is based on SRTM V1, but postprocessed.
> Suppose I want it resampled to 30 meters with elevation at a
> centimeters or millimeter units. Any thoughts on how to do this?
Not sure if you gain anything because the vertical precision is 10m or so.
> I believe the SRTM data are integer formats in meters. Converting
> them to floating point does not necessaily enable you to do sub-meter
> elevation calculations. Am I correct in my assumptions?
That's right. The information content doesn't change if you "just" change
the representation from integer to float. Additional information would be
needed to enrich the dataset.
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