[gdal-dev] JAXAPalsar 1.0 & 1.1 extended metadata reading support

[Frank Warmerdam]

On 11-06-22 04:31 PM, Rodolfo Bonnin wrote:
> Hello Antonio, Frank,
>
> I've now been able to read the false northing UTM parameter. The next
> step is the coordinate system, which is ITRF 97. As this is not a well
> known coordinate system, could this definition be enough to represent
> the standard? (from spatialreference.org):
>
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _  _ _ _ _ _ _ _ _ _ _ _ _
> GEOCCS["ITRF97",
>      DATUM["International Terrestrial Reference Frame 1997",
>          SPHEROID["GRS 1980",6378137.0,298.257222101,
>              AUTHORITY["EPSG","7019"]],
>          AUTHORITY["EPSG","6655"]],
>      PRIMEM["Greenwich",0.0,
>          AUTHORITY["EPSG","8901"]],
>      UNIT["m",1.0],
>      AXIS["Geocentric X",OTHER],
>      AXIS["Geocentric Y",EAST],
>      AXIS["Geocentric Z",NORTH],
>      AUTHORITY["EPSG","4918"]]
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
>


Rondolfo,

In GDAL trunk I have added support for geocentric coordinate systems and
the expansion of EPSG:4338 looks like:

GEOCCS["ITRF97 (geocentric)",
     DATUM["International_Terrestrial_Reference_Frame_1997",
         SPHEROID["GRS 1980",6378137,298.257222101,
             AUTHORITY["EPSG","7019"]],
         AUTHORITY["EPSG","6655"]],
     PRIMEM["Greenwich",0,
         AUTHORITY["EPSG","8901"]],
     UNIT["metre",1,
         AUTHORITY["EPSG","9001"]],
     AXIS["Geocentric X",OTHER],
     AXIS["Geocentric Y",OTHER],
     AXIS["Geocentric Z",NORTH],
     AUTHORITY["EPSG","4338"]]

I believe yours if functionally equivelent. Note that GDAL is unlikely
to support geocentric coordinate systems in a useful fashion in 1.8 and
earlier versions.

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent