Re: [thredds] Adding projections to WMS/TDS

• To: "thredds@xxxxxxxxxxxxxxxx" <thredds@xxxxxxxxxxxxxxxx>
• Subject: Re: [thredds] Adding projections to WMS/TDS
• From: Jon Blower <j.d.blower@xxxxxxxxxxxxx>
• Date: Fri, 19 Jul 2013 19:27:32 +0000

Hi Patrick,

I think in principle your method might have worked, but I the underlying 
Geotoolkit library doesn't handle the Mollweide projection or other 
pseudocylindrical projections.  I understand a future version of the library 
might be able to support these through proj.4 Java bindings perhaps.

(Sorry I thought I'd told you this in an earlier email off-list, but perhaps I 
forgot!)

Cheers,
Jon


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Message: 1
Date: Fri, 19 Jul 2013 11:46:15 +0200
From: Patrick Brockmann <Patrick.Brockmann@xxxxxxxxxxxx>
To: THREDDS community <thredds@xxxxxxxxxxxxxxxx>
Subject: [thredds] Adding projections to WMS/TDS
Message-ID: <51E90AE7.9010803@xxxxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi,

I would like to add new projections to my WMS from TDS 4.3.17 -
20130607.1641

Projections I would like to add are :
Gall-Peters  http://spatialreference.org/ref/sr-org/22/
Robinson http://spatialreference.org/ref/esri/world-robinson/

How do I proceed ?

I have made some tests following the steps below :

1) Explode the epsg-wkt.jar
$ cd tds/apache-tomcat-7.0.34/webapps/thredds/WEB-INF/lib
$ jar xvf epsg-wkt.jar

2) Add OGC WKT Coordinate System encoding for the World Mollweide projection 
$vi org/geotoolkit/referencing/factory/epsg/epsg.properties
Add in a last line
54009=PROJCS["World_Mollweide",GEOGCS["GCS_WGS_1984",DATUM["WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Mollweide"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",0],UNIT["Meter",1],AUTHORITY["EPSG","54009"]]
 


3) Recreate the jar file
$ jar cvf epsg-wkt.jar org

4) Restart the Tomcat

My testing request is :
http://webportals.ipsl.jussieu.fr:8080/thredds/wms/CARBON/fco2_lmdz_matrix_peylin_1996-2004.nc?REQUEST=GetMap&VERSION=1.3.0&CRS=54009&WIDTH=300&HEIGHT=600&FORMAT=image/png&LAYERS=poste_land&TIME=1997-06-16&BBOX=-100,-30,100,60&STYLES=boxfill/redblue&COLORSCALERANGE=-100,100&NUMCOLORBANDS=30
 


But I get: The CRS 54009 is not supported by this server

Did I missunderstand something ?
Do I have to rebuild the thredds.war or is the epsg-wkt.jar is dynamically 
loaded ?

Regards
Patrick

--
LSCE/IPSL, Laboratoire CEA-CNRS-UVSQ
Data Analysis and Visualization Engineer ICMC - IPSL Climate Modelling Centre
--



End of thredds Digest, Vol 54, Issue 10
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