1

I want to download a tiff image from this WMS server with the GetMap-Method:

http://services.lgrb-bw.de/index.phtml?SERVICE_NAME=lgrb_corg&REQUEST=GetCapabilities&VERSION=1.1.1&SERVICE=WMS

After searching for answer, especially here on Stackexchange I managed to write this request and could download the image: http://www4.lgrb.uni-freiburg.de/serverbase/services/index.phtml?SERVICE_NAME=lgrb_corg&amp&request=GetMap&service=WMS&version=1.1.1&layers=cg004&format=image%2Ftiff&STYLE=default&SRS=EPSG:4326&bbox=6.83803,47.2802,8.0206,48.9963&width=2048&height=2048.

But unfortunately the map is completely white. Any suggestions what could be the reason?

Improve this question
2
  • The WMS 1.3.0 response tells us in terms of min and max scale denominators like <MinScaleDenominator>7500</MinScaleDenominator> and <MaxScaleDenominator>125000</MaxScaleDenominator>
    – nmtoken
    Jun 6, 2019 at 16:13
  • You may also need to take into account the WMS/WMTS standard size for a pixel of 0.28 x 0.28 mm (or approx 91 dpi)
    – nmtoken
    Jun 6, 2019 at 16:55

1 Answer 1

Reset to default
1

If you checkout the GetCapabilities response you will see the layers have a ScaleHint set

<ScaleHint min="3.74177136322228" max="62.3628560537046" />

this means you will only get a response at scales between 1:3.7 and 1:62 (in the "native" projection of EPSG:31467). From a quick experiment in QGIS it looks as though you'll get responses from about 1:75K to 1:5K in EPSG:4326.

Improve this answer
1
  • Thank you very much for the hint! I also tried to consider the scale with this request: www4.lgrb.uni-freiburg.de/serverbase/services/… As far as I understand I am now requesting a map with 1 pixel equal to 50 m, so I should be on the given scale between 3.74 and 62.4 but all I see is still blank. Am I right or did I miss something?
    – PDUY
    Jun 2, 2019 at 12:00

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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