[Liblas-devel] updating liblas dependencies to support EPSG:2966

[Charles Cowart]

Hi Howard,

We've recently tried to annotate a dataset with EPSG:2966+5703 and liblas inserts the following into the VLRs:

LOCAL_CS["NAD83 / Indiana West (ftUS) + VERT_CS",
    GEOGCS["NAD83",
        DATUM["unknown",
            SPHEROID["unretrievable - using WGS84",6378137,298.257223563]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433]],
    AUTHORITY["EPSG","2966"],
    UNIT["US survey foot",0.3048006096012192]]

Geotiff_Information:
   Version: 1
   Key_Revision: 1.0
   Tagged_Information:
      End_Of_Tags.
   Keyed_Information:
      GTModelTypeGeoKey (Short,1): ModelTypeProjected
      GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
      GTCitationGeoKey (Ascii,38): "NAD83 / Indiana West (ftUS) + VERT_CS"
      GeogCitationGeoKey (Ascii,6): "NAD83"
      GeogAngularUnitsGeoKey (Short,1): Angular_Degree
      ProjectedCSTypeGeoKey (Short,1): Unknown-2966
      ProjLinearUnitsGeoKey (Short,1): Linear_Foot_US_Survey
      VerticalCSTypeGeoKey (Short,1): Unknown-5703
      VerticalCitationGeoKey (Ascii,14): "NAVD88 height"
      VerticalDatumGeoKey (Short,1): Unknown-5103
      VerticalUnitsGeoKey (Short,1): Linear_Meter
      End_Of_Keys.
   End_Of_Geotiff.

This doesn't reflect what is listed in spatial reference.org (http://spatialreference.org/ref/epsg/2966/), and doesn't appear to be enough to reproject the data into other coordinates systems. Do you know if it's possible to insert the information found in spatial reference.org into proj so that it will insert VLR data like that found in the link?

Best Regards,

Charles