[gdal-dev] Setting up GDAL Custom Transformation from ESRI GTF File

[Derek Stuart]

I am using GDAL routines as part of RAS Mapper within HEC-RAS.   I am
coming from ArcMap where I am using a custom transformation GTF file to
translate from the D_Everest_Bangladesh datum to WGS_1984.

The GTF file includes the following:

GEOGTRAN["ever2wgs",GEOGCS["GCS_Everest_Bangladesh",DATUM["D_Everest_Bangladesh",SPHEROID["Everest_Adjustment_1937",6377276.345,300.8017]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],METHOD["Geocentric_Translation"],PARAMETER["X_Axis_Translation",283.729],PARAMETER["Y_Axis_Translation",735.942],PARAMETER["Z_Axis_Translation",261.143]]

I can't seem to figure out how to set this up for GDAL.  I suspect that I
need to add this to one of the following files.

"C:\Program Files (x86)\HEC\HEC-RAS\5.0\GDAL\data\datum_shift.csv"
"C:\Program Files (x86)\HEC\HEC-RAS\5.0\GDAL\data\ellipsoid.csv"
"C:\Program Files (x86)\HEC\HEC-RAS\5.0\GDAL\data\gcs.csv"
"C:\Program Files (x86)\HEC\HEC-RAS\5.0\GDAL\data\gcs.override.csv"
"C:\Program Files (x86)\HEC\HEC-RAS\5.0\GDAL\data\gdal_datum.csv"
"C:\Program Files (x86)\HEC\HEC-RAS\5.0\GDAL\data\geoccs.csv"
"C:\Program Files (x86)\HEC\HEC-RAS\5.0\GDAL\data\gt_datum.csv"
"C:\Program Files (x86)\HEC\HEC-RAS\5.0\GDAL\data\gt_ellips.csv"

Any tips are appreciated.

-- 
Derek
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/gdal-dev/attachments/20160331/2e3dcc68/attachment.html>