Hi Ivan,
Ah, I'd forgotten that the current TDS uses the espg-properties file. The next
version will embed the full EPSG database, which should fix this issue. Sorry,
I don't know what the correct parameters for 3857 should be. I'll ask the
Geotoolkit mailing list and get back to you if I get an answer.
Cheers, Jon
-----Original Message-----
Message: 5
Date: Thu, 31 Mar 2011 16:15:52 +0200
From: Ivan PRICE <ivan.price@xxxxxxxxxxx>
To: thredds@xxxxxxxxxxxxxxxx
Subject: Re: [thredds] EPSG 3857 (google maps / 900913) in TDS 4.2.5
Message-ID: <4D948C98.5000505@xxxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
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 epsg.properties 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:
http://spatialreference.org/ref/sr-org/6864/
cheers,
-i
