Changes between Version 17 and Version 18 of Help/DEM_scripts


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Timestamp:
Jan 16, 2014 10:29:24 AM (6 years ago)
Author:
stgo
Comment:

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  • Help/DEM_scripts

    v17 v18  
    8787==== Separation Files ====
    8888If projecting the aster data to another projection with a differing elevation model a separation file needs to be used to elevate the aster correctly. For example if projecting the DEM to a osgb36 UKBNG projection from wgs84 lat/lon the elevation model is different. To elevate the aster we need a description of the height differences between the geoid and the spheroid, a file describing the differences between the two can be found at:
    89   *  http://www.ordnancesurvey.co.uk/oswebsite/gps/docs/OSTN02_OSGM02files.zip
     89  *  http://www.ordnancesurvey.co.uk/docs/gps/ostn02-osgm02-files.zip
    9090  *  Once the file has been downloaded run the command:
    9191     *  {{{mkdir OSTN02_OSGM02files; unzip OSTN02_OSGM02files.zip -d OSTN02_OSGM02files}}}