Using TerraGear: Difference between revisions

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Using TerraGear (view source)

Revision as of 14:58, 20 July 2012

1 byte removed ,  20 July 2012
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From now on, we'll assume you are using SRTM-3 data. Unless otherwise noted, the process for SRTM-1 is identical.
From now on, we'll assume you are using SRTM-3 data. Unless otherwise noted, the process for SRTM-1 is identical.


You can download the appropriate data from http://dds.cr.usgs.gov/srtm/version2_1/. You want all .hgt.zip files covering your region of interest. Depending on the size of your scenery, there may be quite a few. Download them to <tt>data/SRTM-1/</tt>(or SRTM-3/SRTM-30 depending on the type you downloaded) in your base directory. (Genapts looks for a few known, hardcoded elevation data directories in it's working directory. SRTM-30 is one of them and this is the least confusing in that list. Note: W.E.F. 31st July 2010, the genapts tool now also looks for SRTM-1/SRTM-3 directories. If you are using an older version, please supply the directories using --dem-path)
You can download the appropriate data from http://dds.cr.usgs.gov/srtm/version2_1/. You want all .hgt.zip files covering your region of interest. Depending on the size of your scenery, there may be quite a few. Download them to <tt>data/SRTM-1/</tt>(or SRTM-3/SRTM-30 depending on the type you downloaded) in your base directory. (Genapts looks for a few known, hardcoded elevation data directories in its working directory. SRTM-30 is one of them and this is the least confusing in that list. Note: W.E.F. 31st July 2010, the genapts tool now also looks for SRTM-1/SRTM-3 directories. If you are using an older version, please supply the directories using --dem-path)


Now we've got the data, we need to convert it into something of use to TerraGear. First, you need to unzip each of the .hgt files. After that, open the commandline (Windows: <tt>Start > Run > cmd.exe</tt>) and change into the base directory (<tt>cd .../.../TerraGear</tt>).  
Now we've got the data, we need to convert it into something of use to TerraGear. First, you need to unzip each of the .hgt files. After that, open the commandline (Windows: <tt>Start > Run > cmd.exe</tt>) and change into the base directory (<tt>cd .../.../TerraGear</tt>).  
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