[gdal-dev] Call to users and devs - ESRI .prj files needed for testing

[Etienne Tourigny]

Martin, thanks for this reference!

It seems that the dattrans.htm file contains datum transformations
used by ESRI, with a number of methods.

Would it make any sense to use that information (using a new derived
.csv file) to add TOWGS84 parameters to ESRI WKT definitions, instead
of using the ones defined in gcs.csv?


For example:

this one matches the TOWGS84 that GDAL uses for EPSG:4618
GEOGTRAN["SAD_1969_To_WGS_1984_1",GEOGCS["GCS_South_American_1969",DATUM["D_South_American_1969",SPHEROID["GRS_1967_Truncated",6378160.0,298.25]],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",-57.0],PARAMETER["Y_Axis_Translation",1.0],PARAMETER["Z_Axis_Translation",-41.0]]

EOGTRAN["RT90_To_WGS_1984_2",GEOGCS["GCS_RT_1990",DATUM["D_RT_1990",SPHEROID["Bessel_1841",6377397.155,299.1528128]],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["Coordinate_Frame"],PARAMETER["X_Axis_Translation",414.1],PARAMETER["Y_Axis_Translation",41.3],PARAMETER["Z_Axis_Translation",603.1],PARAMETER["X_Axis_Rotation",0.855],PARAMETER["Y_Axis_Rotation",-2.141],PARAMETER["Z_Axis_Rotation",7.023],PARAMETER["Scale_Difference",0.0]]

GEOGTRAN["Palestine_1923_To_WGS_1984_1",GEOGCS["GCS_Palestine_1923",DATUM["D_Palestine_1923",SPHEROID["Clarke_1880_Benoit",6378300.79,293.466234571]],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["Position_Vector"],PARAMETER["X_Axis_Translation",-275.7224],PARAMETER["Y_Axis_Translation",94.7824],PARAMETER["Z_Axis_Translation",340.8944],PARAMETER["X_Axis_Rotation",-8.001],PARAMETER["Y_Axis_Rotation",-4.42],PARAMETER["Z_Axis_Rotation",-11.821],PARAMETER["Scale_Difference",1.0]]

GEOGTRAN["Anguilla_1957_To_WGS_1984_1",GEOGCS["GCS_Anguilla_1957",DATUM["D_Anguilla_1957",SPHEROID["Clarke_1880_RGS",6378249.145,293.465]],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["Geographic_2D_Offset"],PARAMETER["Longitude_Offset",4.4],PARAMETER["Latitude_Offset",-18.0]]



On Thu, Dec 1, 2011 at 6:05 PM, Martin Daly <Martin.Daly at cadcorp.com> wrote:
>> As an ongoing effort to improve ESRI .prj file compatibility, I am respectfully
>> calling all users and devs to help in providing or pointing to existing .prj files
>> (in ESRI WKT format).
>
> http://help.arcgis.com/en/arcims/10.0/mainhelp/mergedProjects/ArcXMLGuide/elements/gcs.htm
> http://help.arcgis.com/en/arcims/10.0/mainhelp/mergedProjects/ArcXMLGuide/elements/pcs.htm
> http://help.arcgis.com/en/arcims/10.0/mainhelp/mergedProjects/ArcXMLGuide/elements/dattrans.htm
>
> Martin
>
>
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