Ethan,
That's great that Albers, LCC and others should work with TDS 4.3 WMS.
That means it should work on:
http://motherlode.ucar.edu:9080/thredds
which is at TDS 4.3.15.
So on that server, I can get this WMS request to work using EPSG:4326:
http://motherlode.ucar.edu:9080/thredds/wms/grib/NCEP/NAM/CONUS_12km/files/NAM_CONUS_12km_20121017_1200.grib2?LAYERS=Temperature_height_above_ground&ELEVATION=2&TIME=2012-10-17T12%3A00%3A00.000Z&TRANSPARENT=true&STYLES=boxfill%2Frainbow&CRS=EPSG%3A4326&COLORSCALERANGE=263.7%2C302.6&NUMCOLORBANDS=20&LOGSCALE=false&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FORMAT=image%2Fpng&SRS=EPSG%3A4326&BBOX=-128.16154395928,13.676912081443,-76.323087918557,65.515368122164&WIDTH=256&HEIGHT=256
But I can't get anything else to work.
Can you provide a modified version of the above request that works for
Albers (EPSG:9822) or LCC (EPSG:9802)
-Rich
On Wed, Oct 17, 2012 at 11:55 AM, Ethan Davis <edavis@xxxxxxxxxxxxxxxx> wrote:
> Hi Rich,
>
> Even if a CRS is not listed, both ncWMS and TDS WMS can handle requests
> for any CRS supported by the underlying GeoToolkit library. The CRS
> database in TDS 4.2 does not contain EPSG CRS 9822 or 9802. However,
> they should both be available in TDS 4.3. So, if you are trying this on
> a TDS 4.3, you can just give it a try.
>
> As for the WMS GetCapabilities CRS list, it is currently not user
> configurable. For TDS 4.3 it would simply be a matter of a minor code
> change (adding the two EPSG numbers to a list) and then rebuilding. It
> is a bit more work in TDS 4.2, but not much harder, along with adding
> the EPSG number to a list, we would need a WKT for each of the new
> projections. (The CRS WKT needs to be in a form the GeoToolkit can read.)
>
> We've kept the list to a minimum because in earlier versions we listed
> all available projections and the list got quite large.
>
> Are you using TDS 4.3? Do you need these CRS to be in the list or is
> being able to request them enough?
>
> Cheers,
>
> Ethan
>
> On 10/17/2012 8:17 AM, Rich Signell wrote:
>> TDS folks,
>>
>> What would it take to get Albers or LCC supported as a projection on
>> the TDS WMS?
>>
>> According to the WMS getCapabilities (for example:
>> http://motherlode.ucar.edu/thredds/wms/fmrc/NCEP/GFS/CONUS_191km/NCEP-GFS-CONUS_191km_best.ncd?service=WMS&version=1.3.0&request=GetCapabilities
>>
>> the supported projections are:
>> <Title>Motherlode TDS</Title>
>> <CRS>EPSG:4326</CRS>
>> <CRS>CRS:84</CRS>
>> <CRS>EPSG:41001</CRS>
>> <CRS>EPSG:3857</CRS>
>> <CRS>EPSG:27700</CRS>
>> <CRS>EPSG:3408</CRS>
>> <CRS>EPSG:3409</CRS>
>> <CRS>EPSG:32661</CRS>
>> <CRS>EPSG:32761</CRS>
>>
>> Okay, so we don't see Albers Equal Area (EPSG:9822) or Lambert Conformal
>> Conic 2SP (EPSG:9802) on the list.
>>
>> But TDS WMS is based on ncWMS, and on the ncWMS FAQ at:
>>
>> http://www.resc.rdg.ac.uk/trac/ncWMS/wiki/FrequentlyAskedQuestions
>>
>> it says that ncWMS "can produce images in any projection that is
>> supported by the GeoTools library".
>>
>> And it appears that GeoTools can support both Albers and LCC:
>>
>> http://docs.geotools.org/latest/javadocs/org/geotools/referencing/operation/projection/package-summary.html
>>
>> So would it be straightforward (or perhaps even easy) to allow the TDS
>> WMS to support these?
>>
>> Thanks,
>> Rich
>>
>
> --
> Ethan Davis UCAR Unidata Program
> edavis@xxxxxxxxxxxxxxxx http://www.unidata.ucar.edu
>
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Dr. Richard P. Signell (508) 457-2229
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