8

I am trying to access the WMS layers from the UK Coal Authority website. I can connect to their servers and see the raster files available but when I download them, I can only view the rasters from the first and last services:

The others do not work for me. These were my steps:

  1. Create new WMS connection and only add a Name and copy URL location from website:

    Copy URL

  2. Click Connect and select a raster layer:

    Select raster

    Layer is added along with a legend but nothing is shown on the map canvas. I also checked the properties of the layer and noticed that there were no rows/columns of data:

    Raster properties


Is there something wrong with my procedure or with the rasters?

Doubt it's relevant but I am using QGIS 2.16.0-Nødebo.

4
  • I can confirm no inital results on the Mine Entry service... map.bgs.ac.uk/arcgis/services/CoalAuthority/… Commented Aug 12, 2016 at 14:12
  • 1
    The 'Mine Entry' data is available behind a proxy using mapapps2.bgs.ac.uk/coalauthority/home.html Zoom in Switch on Mine Entry - maybe contact BGS mentioning the issue with the WMS service.
    – Mapperz
    Commented Aug 12, 2016 at 14:19
  • @Mapperz - Thanks, I may well contact them as the 'Mine Entry' data is the one I would mainly like :)
    – Joseph
    Commented Aug 12, 2016 at 14:22
  • old question, but I also checked the properties of the layer and noticed that there were no rows/columns of data: is expected for a WMS, which supplies an image. hence n/a
    – nmtoken
    Commented May 24 at 9:46

3 Answers 3

7

It definitely works when you are zoomed in to a coal mining area beyond 1:70K.

If you check the getcapabilities you can see the MaxScaleDenominator is set. I suspect the server is calculating that in the internal projection of the data which is EPSG:27700 (again I'm guessing but it probably is) so if you are viewing in EPSG:4326 (as you are) then you seem to need to zoom in to 1:20K or so to see the layer.

<Layer queryable="1">
<Name>Mine.Entry</Name>
<Title>Mine Entry</Title>
<Abstract>Mine Entry</Abstract>
<KeywordList>
<Keyword>Map</Keyword>
<Keyword>Coal</Keyword>
<Keyword>Mining</Keyword>
<Keyword>United Kingdom</Keyword>
<Keyword>Underground</Keyword>
<Keyword>Energy</Keyword>
<Keyword>Mining Report</Keyword>
<Keyword>Ground Stability</Keyword>
<Keyword>Coal Resource</Keyword>
<Keyword>Exploration</Keyword>
<Keyword>www.groundstability.com</Keyword>
</KeywordList>
<CRS>CRS:84</CRS>
<CRS>EPSG:4326</CRS>
<CRS>EPSG:4258</CRS>
<CRS>EPSG:27700</CRS>
<CRS>EPSG:3857</CRS>
<EX_GeographicBoundingBox>
<westBoundLongitude>-9.141715</westBoundLongitude>
<eastBoundLongitude>2.475924</eastBoundLongitude>
<southBoundLatitude>49.766186</southBoundLatitude>
<northBoundLatitude>60.010291</northBoundLatitude>
</EX_GeographicBoundingBox>
<BoundingBox CRS="CRS:84" minx="-9.141715" miny="49.766186" maxx="2.475924" maxy="60.010291"/>
<BoundingBox CRS="EPSG:4326" minx="49.766186" miny="-9.141715" maxx="60.010291" maxy="2.475924"/>
<BoundingBox CRS="EPSG:4258" minx="49.766186" miny="-9.141715" maxx="60.010291" maxy="2.475924"/>
<BoundingBox CRS="EPSG:27700" minx="0.000400" miny="0.000000" maxx="650000.000000" maxy="1124993.166600"/>
<BoundingBox CRS="EPSG:3857" minx="-962732.119400" miny="6422724.117000" maxx="196764.181600" maxy="8593971.998200"/>
<MetadataURL type="TC211">
<Format>text/html</Format>
<OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="https://www.gov.uk/government/publications/coal-mining-data-mine-entries"/>
</MetadataURL>
<DataURL>
<Format>text/html</Format>
<OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href="https://www.gov.uk/government/publications/coal-mining-data-mine-entries"/>
</DataURL>
<Style>
<Name>inspire_common:DEFAULT</Name>
<Title>Mine Entry</Title>
<LegendURL width="72" height="52">
<Format>image/png</Format>
<OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://map.bgs.ac.uk/HOSTED_WMS/legends/TCA/mine_entry.png" xlink:type="simple"/>
</LegendURL>
</Style>
<MaxScaleDenominator>70870.535714</MaxScaleDenominator>
</Layer>

enter image description here

0
6

I think it has to do with zoomscale.

This map http://mapapps2.bgs.ac.uk/coalauthority/home.html seems to use the same services. Checkboxes are greyed out till zoomed in enough.

0
1

Thanks to buddiebubba and iant, the zoom extent was part of the problem (atleast it seems for me). I also had to change the colour rendering of the raster style and use a blending mode such as Darken to filter out the whitespace which were prevalent:

Result

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.