Trying to load the service http://gis.ktimanet.gr/wms/ktbasemap/default.aspx
and receives the message
Could not understand the response. The wms provider said:
Could not get WMS capabilities: error occurred while parsing reference at line 5 column 179
This is probably due to an incorrect WMS Server URL.
Neither in http://gis.ktimanet.gr/wms/ktbasemap/default.aspx?SERVICE=WMS&REQUEST=GetCapabilities
I have result.I never had a similar problem again with this service into something so simple
[GIS] Can not load a WMS services on QGIS
qgiswms
Related Solutions
You can test whether the WMS service is configured correctly by making the GetCapabilities request directly in a browser
http://***************/cgi-bin/projects/qgismapserv.fcgi?SERVICE=WMS&REQUEST=GetCapabilities
The format of the request in your question is correct, so if you get an error the server is not correctly configured.
You will need to look at the server logs to help you debug your issue(s)
I chose the root layer (layer with ID 0 in QGIS), and I get an image (as below), so the service itself is working.
Coverage isn't 100%, and this applies even more so to the individual layers, so you will get a blank image if you choose an area of no data.
If you keep this layer on you will have all data, but it makes it difficult to work out what you are querying (you'll get results for all layers in a GetFeatureInfo request)/or looking at (you only get one legend).
If you want individual layers, something to note from the GetCapabilities response is that the layers are restricted by scale, that is to say they are not available at all scales.
For example layer 2 (Alluvial Fans) has the following information in the GetCapabilities response:
<MaxScaleDenominator>236235.119048</MaxScaleDenominator>
So if you are zoomed out too far, you won't get any data.
Couldn't find an alluvial fan, but below is another layer (Flood Hazard Zones) available when you zoom in.
See section 7.2.4.6.9 of the WMS 1.3.0 specification to learn more about Scale denominators.
SSL issues
When I view the WMS GetCapabilities in a browser I get a padlock that tells me the certificate is valid.
I've tried QGIS 2.18.3 on Windows 10, and QGIS 2.14.17 on Linux; both work. I haven't got access to a Mac to test, so it's difficult to know if this is some Mac OS issue, or some issue to do with the updated version of QGIS, or some issue localized to you.
Best Answer
The web site for the online user is not the same adress as for the WMS service.
Following the last link on the entrance page https://www.ktimanet.gr/CitizenWebApp/Entrance_Page.aspx to https://www.ktimanet.gr/CitizenWebApp/Orthophotographs_Page.aspx I found this address:
http://gis.ktimanet.gr/wms/wmsopen/wmsserver.aspx
which works in QGIS as WMS service.