3

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> Commented 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) Commented Jun 6, 2019 at 16:55

1 Answer 1

Reset to default
2

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? Commented Jun 2, 2019 at 12:00

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.