Changes between Version 30 and Version 31 of Processing/SRTMDEMs


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Timestamp:
Oct 4, 2011, 5:27:28 PM (13 years ago)
Author:
knpa
Comment:

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  • Processing/SRTMDEMs

    v30 v31  
    11== Creating DEMs from ASTER or SRTM data ==
    22
    3 '''** Note: The instructions below explain how to make an ASCII UTM DEM. Instead you may need to make a binary DEM. This is the same process but instead of r.out.ascii, use 'r.out.gdal format=ENVI type=Float32' from the lat long grass location. This will still need to be elevated to WGS84 and should be interpolated so there are no no-data values in the binary output **'''
     3'''** Note: The instructions below explain how to make an ASCII UTM DEM. If this DEM is intended for use with aplcorr, it will need to be a binary DEM instead. This is the same process but instead of r.out.ascii, use 'r.out.gdal format=ENVI type=Float32' from the lat long grass location. This will still need to be elevated to WGS84 and should be interpolated so there are no no-data values in the binary output **'''
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    55The ASTER GDEM is a global elevation dataset at 1-arc-second (30m) horizontal resolution, covering the earth from 83S-83N. More data about the dataset is available at http://www.ersdac.or.jp/GDEM/E/2.html, the dataset itself can be downloaded from http://www.gdem.aster.ersdac.or.jp/.