[GeoNetwork-users] customizing the GN 3 map viewer

[Herbert, D. J. <da...@ba...>]

I have recently installed Geonetwork version 3.0.1, and am impressed by the progress that's been made over version 2.   There is a bit of a blocker for us at the moment, however, since all our data is concerned with the Polar regions and is in a Polar Stereographic projection (e.g. EPSG:3031).   The default map viewer in Mercator with Bing/OSM really won't do for our applications because of the extreme distortion.  So I have been investigating how I might customize the map for our needs.   This includes using our own projection, together with our own WMS services to provide the mapping.

First, I have looked in the system settings under "configuration for maps".  I found out where the XML configuration files live in:

webapps/geonetwork/WEB-INF/data/data/resources/map

I created a Web Map Context document in this directory which I think should give us what we want:

<owc:OWSContext version="0.3.1" id="ows-context-ex-1-v3"
        xmlns:owc="http://www.opengis.net/ows-context"
        xmlns="http://www.opengis.net/ows-context" xmlns:gml="http://www.opengis.net/gml"
        xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:ogc="http://www.opengis.net/ogc"
        xmlns:ows="http://www.opengis.net/ows" xmlns:sld="http://www.opengis.net/sld"
        xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.opengis.net/ows-context http://www.ogcnetwork.net/schemas/owc/0.3.1/owsContext.xsd">
        <owc:General>
                <ows:BoundingBox crs="EPSG:3031">
                        <ows:LowerCorner>-5000000 -5000000</ows:LowerCorner>
                        <ows:UpperCorner>5000000 5000000</ows:UpperCorner>
                </ows:BoundingBox>
                <ows:Title>ADD backdrop</ows:Title>
        </owc:General>
        <owc:ResourceList>
                <!-- WMS Example -->
                <owc:Layer name="add:antarctic_hillshade_and_bathymetry" queryable="1" hidden="0">
                        <ows:Title>ADD Hillshade and Bathymetry</ows:Title>
                        <ows:OutputFormat>image/png</ows:OutputFormat>
                        <owc:Server service="urn:ogc:serviceType:WMS" version="1.3.0">
                                <owc:OnlineResource
                                        xlink:href="https://maps.bas.ac.uk/add/wms?SERVICE=WMS" />
                        </owc:Server>
                </owc:Layer>
                        <owc:Layer name="add:coastline" hidden="0">
                                <ows:Title>ADD Coastline</ows:Title>
                                <owc:Server service="urn:ogc:serviceType:WMS" version="1.3.0">
                                        <owc:OnlineResource xlink:href="https://maps.bas.ac.uk/add/wms?SERVICE=WMS" />
                                </owc:Server>
                        </owc:Layer>
        </owc:ResourceList>
</owc:OWSContext>

I have put this JSON into "configuration for maps":

{"viewerMap":"../../map/config-viewer-bas.xml","listOfServices":{"wms":["https://maps.bas.ac.uk/add/wms"]},"useOSM":false,"context":"","layer":{"url":"https://maps.bas.ac.uk/add/wms","layers":"add:hillshade_and_bathymetry","version":"1.3.0"},"projection":"EPSG:3031","projectionList":[{"code":"EPSG:3031","label":"Antarctic Polar Stereographic (EPSG:3031)"},{"code":"EPSG:4326","label":"WGS84 (EPSG:4326)"},{"code":"EPSG:3857","label":"Google mercator (EPSG:3857)"}]}

And "List of CRS" contains:

[{"code":"EPSG:2154","value":"+proj=lcc +lat_1=49 +lat_2=44 +lat_0=46.5 +lon_0=3 +x_0=700000 +y_0=6600000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs"},{"code":"EPSG:3031","value":"+proj=stere +lat_0=-90 +lat_ts=-71 +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs"}]

But still the Bing Maps view appears, not any custom version.  I am beginning to think I'm missing a build step somewhere, or maybe need to build GN3 from source in order to do this?  Or maybe the "context" and "layer" parameters in the config need to be set differently?  I'm not clear on their significance.

Can anyone help please?

Much appreciated.

David Herbert
British Antarctic Survey.

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