[GIS] OGC WMS Validation

ogcwms

We're trying to validate our WMS server with OGC standards,to do so OGC has a test page available.

Here,only stacked on a single error

 wms:profiles-basic-1 (View Details): Failed

When we look into detail
http://cite.opengeospatial.org/test_engine/wms/1.1.1/exec_summary
page requires following conditions in order to validate WMS 1.1.1 standards:

It must support image/png or image/gif for GetMap requests.

It must contain the CITE dataset in layers that are subsetable and resizable and support EPSG:4326.

The EPSG:4326 support must be precise up to the ten-thousandth of a degree.

The default style for the cite:Lakes layer must fill in the polygon with non-white pixels.

Condition 1 is clear and is supported on the system.The problem is I believe on the others (2,3,4)
What causes validation test to fail ?

Best Regards

Best Answer

I found the answer,that we should implement layers in capabilities xml.

<Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>citeLayers</Name> <Title>Cite Layers</Title> <SRS>EPSG:4326</SRS> <LatLonBoundingBox minx="-1.0" miny="-1.0" maxx="1.0" maxy="1.0" /> <BoundingBox SRS="EPSG:4326" minx="-1.0" miny="-1.0" maxx="1.0" maxy="1.0" resx="-1.0" resy="-1.0" /> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:BasicPolygons</Name> <Title>cite:BasicPolygons</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:Bridges</Name> <Title>cite:Bridges</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:Buildings</Name> <Title>cite:Buildings</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:DividedRoutes</Name> <Title>cite:DividedRoutes</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:Forests</Name> <Title>cite:Forests</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:Lakes</Name> <Title>cite:Lakes</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:MapNeatline</Name> <Title>cite:MapNeatline</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:NamedPlaces</Name> <Title>cite:NamedPlaces</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:Ponds</Name> <Title>cite:Ponds</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:RoadSegments</Name> <Title>cite:RoadSegments</Title> <SRS>EPSG:4326</SRS> </Layer> <Layer cascaded="0" noSubsets="0" opaque="0" queryable="1"> <Name>cite:Streams</Name> <Title>cite:Streams</Title> <SRS>EPSG:4326</SRS> </Layer> </Layer>

Therefore,I found xslt variable which returns false and validated with output xml file.

<xsl:variable name="VAR_STDDATA_EXISTS">
<xsl:value-of select="count(//Layer[(Title = 'cite:BasicPolygons' or    Title = 'cite:Bridges' or    Title = 'cite:Buildings' or    Title = 'cite:DividedRoutes' or    Title = 'cite:Forests' or    Title = 'cite:Lakes' or    Title = 'cite:MapNeatline' or    Title = 'cite:NamedPlaces' or    Title = 'cite:Ponds' or    Title = 'cite:RoadSegments' or    Title = 'cite:Streams')    and ancestor-or-self::Layer/SRS[contains(., 'EPSG:4326')]    and not(@noSubsets = 1)    and (not(@fixedWidth) or @fixedWidth = 0)    and (not(@fixedHeight) or @fixedHeight = 0)]) = 11   "/>

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[GIS] OpenLayers weird problem with GoogleMaps base layer and WMS overlay

In OpenLayers, the base layer dictates what is going to be the "base spatial reference". So any overlay will be projected to the base srid. Since any base layer that comes from the consumer-based providers (google, bing, yahoo, etc) supports only 900913, then OpenLayers is doing the right thing for your.

If you do a GetCapabilities call on your server you will notice the following section:

<Layer queryable="1" opaque="0" noSubsets="0">
<Name>Catastro</Name>
<Title>Catastro</Title>
<Style>
<Name>Default</Name>
<Title>Default</Title>
<LegendURL width="160" height="500">
<Format>image/png</Format>
<OnlineResource xlink:type="simple" xlink:href="http://ovc.catastro.meh.es/Cartografia/WMS/simbolos.png"/>
</LegendURL>
</Style>
<BoundingBox SRS="EPSG:4230" minx="-18.409876" miny="26.275447" maxx="5.22598" maxy="44.85536"/>
<BoundingBox SRS="EPSG:4326" minx="-18.409876" miny="26.275447" maxx="5.22598" maxy="44.85536"/>
<BoundingBox SRS="EPSG:4258" minx="-18.409876" miny="26.275447" maxx="5.22598" maxy="44.85536"/>
<BoundingBox SRS="EPSG:32627" minx="770000" miny="3000000" maxx="2700000" maxy="5000000"/>
<BoundingBox SRS="EPSG:32628" minx="180000" miny="3000000" maxx="2170000" maxy="5000000"/>
<BoundingBox SRS="EPSG:23029" minx="-410000" miny="3000000" maxx="1650000" maxy="5000000"/>
<BoundingBox SRS="EPSG:23030" minx="-1050000" miny="3000000" maxx="1150000" maxy="5000000"/>
<BoundingBox SRS="EPSG:23031" minx="-1615000" miny="3000000" maxx="620000" maxy="5000000"/>
<BoundingBox SRS="EPSG:32629" minx="-410000" miny="3000000" maxx="1650000" maxy="5000000"/>
<BoundingBox SRS="EPSG:32630" minx="-1050000" miny="3000000" maxx="1150000" maxy="5000000"/>
<BoundingBox SRS="EPSG:32631" minx="-1615000" miny="3000000" maxx="620000" maxy="5000000"/>
<BoundingBox SRS="EPSG:25829" minx="-410000" miny="3000000" maxx="1650000" maxy="5000000"/>
<BoundingBox SRS="EPSG:25830" minx="-1050000" miny="3000000" maxx="1150000" maxy="5000000"/>
<BoundingBox SRS="EPSG:25831" minx="-1615000" miny="3000000" maxx="620000" maxy="5000000"/>
<BoundingBox SRS="EPSG:3785" minx="-2100000" miny="3000000" maxx="500000" maxy="5600000"/>
</Layer>

Lo and behold, 900913 is not an option. You may need to either:

modify the WMS server definition to make sure that 900913 is allowed as a valid reprojection
add a definition for that new srid (depends on what web server you are using)
a combination of thse

By looking at the URL, it seems you are using an ASP .NET WMS server, since Geoserver is java and Mapserver if cgi, and ArcGIS Server is .NET, I am going guess this is an ESRI server, so the instructions on how to modify this is here.

Update: As mkennedy points out, the official EPSG code for SphericalMercator (aka Google's projection) is 3857 and a previous assigned number was 3785. If you are wondering why there are so many numbers that refer to the same spatial reference, crschmidt's blog post will give you a clue...

Ian pointed out the relevant OpenLayer's documentation section to force OpenLayers to use that EPSG code instead.

Since your GetCapabilities section shows 3785, the code from the OL documentation won't work as is, you will need to replace all the 3857 for 3785.

[GIS] Problems configuring MapProxy to serve WMS layer

Solved. With this configuration in the MapProxy yaml file:

services:
  wms:
    srs: ['EPSG:3785', 'EPSG:4326', 'EPSG:23028']
    image_formats: ['image/jpg', 'image/png']

layers:
  name: mylayer
  title: My layer
  sources: [my_cache]

caches:
  my_cache:
   grids: [GLOBAL_MERCATOR]
   sources: [my_wms_source]
   format: image/png
   request_format: image/png

sources:
  my_wms_source:
   type:wms
   req:
     url: http://ip_of_my_mapserver_machine/cgi-bin/mapserv?
     layers: mylayer_in_mapserver
     map: /path/to/my/mapfile.map
   supported_srs:['EPSG:3785', 'EPSG:4326', 'EPSG:23028']

Best Answer

Related Solutions

[GIS] OpenLayers weird problem with GoogleMaps base layer and WMS overlay

[GIS] Problems configuring MapProxy to serve WMS layer

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