Changes between Version 11 and Version 12 of TerrainData


Ignore:
Timestamp:
06/05/25 22:53:42 (3 days ago)
Author:
Olly Betts
Comment:

wording improvements

Legend:

Unmodified
Added
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  • TerrainData

    v11 v12  
    11= Terrain Data =
    22
    3 Survex 1.2.18 adds support for displaying terrain data.
     3Survex 1.2.18 added support for displaying terrain data.
    44
    55You'll hopefully find this useful, but it is still a work in progress - this page documents the remaining issues, and also where you can get terrain data from.
    … …  
    77== Obtaining Terrain Data ==
    88
    9 The following sources can be download free of charge, though the data may have restrictions on use and redistribution, so check the licence in each case to see what it allows you to do.
     9The following sources can be downloaded free of charge, though the data may have restrictions on use and redistribution, so check the licence in each case to see what it allows you to do.
    1010
    1111=== Sources with Near-Global Coverage ===
    … …  
    4747Aven 1.2.20 adds support for the same formats, but with the files directly on disk.  You will probably find this useful on Windows, where the wxWidgets zip file reading code always seemed to fail to read data with "generic read error".
    4848
    49 The terrain data currently needs to be in WGS84 lat/long (and the code currently doesn't report an error if it isn't).
     49The terrain data currently needs to be in WGS84 lat/long (EPSG:4326) - the code currently doesn't report an error if it isn't.
    5050
    51 If you have data in a different format, then [http://www.gdal.org/ GDAL] may be useful for converting it.
     51If you have data in a different format, then [http://www.gdal.org/ GDAL] may be useful for converting it.  See the `gdal_translate` tool.
    5252
    5353Aven 1.4.9 links to the GDAL library for loading geodata overlays, so we now have GDAL easily available for reading terrain data in more formats.  If there are particular formats it would be useful to be able to read, please [#82 add a comment to this ticket].