[mapserver-users] Mapserver projection, auto and extent

[Jeff McKenna]

Hi Trygve,

You can examine the problem QGIS GetMap request closely, through the 
Network Logger (it's really a saviour) 
https://github.com/mapserver/mapserver/wiki/Get-the-Raw-WMS-Request-Generated-by-QGIS

Then you can go back to review the trusty WMS Server document, and make 
sure you have set the required metadata: 
https://mapserver.org/ogc/wms_server.html

(which also means to remove all warnings from your GetCapabilities response)

But that QGIS network logger is your lifeline :)

Hope that gets you started,

PS. I never use 'auto', ever, never, it's my own rule and that's how I 
keep my sanity and avoid these issues, ha.  But others like it.  I only 
speak for myself here.

-jeff



-- 
Jeff McKenna
GatewayGeo: Developers of MS4W, MapServer Consulting and Training
co-founder of FOSS4G
http://gatewaygeo.com/



On 2022-05-19 10:26 a.m., Trygve Aspenes wrote:
> Hi
> 
> I got a geotiff raster with a projection which is not an EPSG code, so 
> in the mapfile I use AUTO in the layer projection. This also means I 
> skip the extent and projection in map level in the mapfile. In one 
> client this works fine ( this client request epsg:3857 and this looks 
> fine to me)
> 
> But in QGIS, this does not work nor any other projections.
> 
> Then I add EXTENT and PROJECTION in my mapfile like this:
> MAP
> ....
>    EXTENT -56.6378419 31.5007307 95.025531 84.6828537
>    PROJECTION
>      "init=epsg:4326"
>    END
> ....
> END
> 
> And then EPSG:4326 works in QGIS also. But if I try to change the 
> projection i qgis, eg to EPSG:3857, this does not work in QGIS, even if 
> it still work in my other client.
> 
> So what is it that I don't understand about EXTENT and PROJECTION. I 
> have looked at the documentation 
> https://mapserver.org/mapfile/projection.html#important-notes and and as 
> far as I can understand from the second bullet point the projection 
> definition at map level can be looked as the outgoing projection with 
> the extent accordingly.
> 
> What do I need to do to make QGIS be able to use other projections as well?
> 
> I do have a link to my getcapabilities document, but hesitates to put it 
> here.
> 
> Trygve Aspenes