Re: [thredds] EPSG 3857 (google maps / 900913) in TDS 4.2.5

Ok thanks Jon,

i tried upgrading the version of geotoolkit-bundle-referencing.jar but it resulted in java exceptions when i did getMap requests.

I then had a poke around in the file: epsg-wkt.jar and noticed that it was missing an entry for epsg 3857

3857=PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["Popular Visualisation CRS",DATUM["Popular_Visualisation_Datum",SPHEROID["Popular Visualisation Sphere",6378137,0,AUTHORITY["EPSG","7059"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6055"]], PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328, AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4055"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]], PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1], PARAMETER["false_easting",0],PARAMETER["false_northing",*-14500*],AUTHORITY["EPSG","3785"], AXIS["X",EAST],AXIS["Y",NORTH]]

adding the above line to the file gets the WMS maps working, but they are shifted to the north by about 14km. I have to add that bogus false northing to get them to line up properly.. ok for now but theres something screwy going on somewhere. maybe my definition i added is bad ? i got it from here:



Le 31/03/2011 11:31 AM, Jon Blower a écrit :
Hi Ivan,

A workaround might be to change the version of 
geotoolkit-bundle-referencing.jar on your server to version 3.12 or above.  
However, I'm not 100% sure this will work (I'm not even 100% sure that TDS uses 
this JAR or not - the latest standalone ncWMS does though).

I think Ethan and the Unidata guys are working on a new release that will 
include the updated CRS database.  I'm not sure of the timeline for this.

Cheers, Jon


Message: 4
Date: Wed, 30 Mar 2011 17:34:23 +0200
From: Ivan PRICE<ivan.price@xxxxxxxxxxx>
To: thredds@xxxxxxxxxxxxxxxx
Subject: [thredds] EPSG 3857 (google maps / 900913)  in TDS 4.2.5 ..
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi there,

I am noticing the problem described here:

namely, that thredds WMS server is giving the error: "The CRS EPSG:3857
is not supported by this server"

when i am asking for a map in that CRS, despite the fact that it is
advertised as working in the GetCapabilities.

The above discussion wasn't resolved i think.. is there a workaround for
this, or perhaps i should revert to version 4.2.4 to get it back ?

thanks very much


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