[gdal-dev] GDAL spatial reference issue

[Etienne Tourigny]

A few ESRI ids correspond to ESRI authid codes - but not all so it's
not fool-proof...

Assuming the esri code DOES correspond to EPSG code, you would
basically use OSRImportFromEPSG( <latestWkid>)

In your example, the    "latestWkid" : 3857 corresponds to EPSG:3857
which is the WGS 84 / Pseudo-Mercator
and       "wkid" : 102100 is the "old" id which has been replaced by 3857

see:
http://forums.esri.com/Thread.asp?c=93&f=984&t=288607
http://forums.arcgis.com/threads/8762-WGS-1984-Web-Mercator-(Auxiliary-Sphere)-WKID-102100


Frank - this may require yet another ESRI-OGC translation scheme!

Many (but by all means not all) ESRI srid correspond to EPSG authids,
but not in the upper range....


Etienne

On Wed, Jun 13, 2012 at 6:50 PM, Murali Krishna
<muralikrishna50 at gmail.com> wrote:
> Frank,
>
> I don't have access to ESRI WKT. I was given the following
> SpatialReference information by ArcGIS Feature Server when i query for a
> layer schema:
>
> "spatialReference" : {
>       "wkid" : 102100,
>       "latestWkid" : 3857
>     }
> So from the above "wkid" i need to create a shape file. Is there any way of
> doing this in GDAL.
>
> Regards
>
> Murali
>
> On Wed, Jun 13, 2012 at 10:39 PM, Frank Warmerdam <warmerdam at pobox.com>
> wrote:
>>
>> On Wed, Jun 13, 2012 at 2:19 PM, Murali Krishna
>> <muralikrishna50 at gmail.com> wrote:
>> > I'm facing an issue in creating ESRI shape files using GDAL library.
>> >
>> > I want to create a layer with SpatialReference information set on it and
>> > until now i'm creating SpatialReference by importing WellKnownText (wkt)
>> > representation.
>> >
>> > Is there any way we can create the same SpatialReference from ESRI's
>> > WellKnownId (wkid) using gdal ogr java bindings?
>>
>> Murali,
>>
>> If you are importing ESRI Projection Engine strings (ESRI WKT) then
>> after ingesting the WKT into an OGRSpatialReference object call
>> the morphFromESRI() method to transform into "OGR standard"
>> form.
>>
>> 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 Software Developer
>
>
>
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev