Bug report #14187
Contextual legend
Status: | Closed | ||
---|---|---|---|
Priority: | Normal | ||
Assignee: | - | ||
Category: | Web Services clients/WMS | ||
Affected QGIS version: | 2.12.2 | Regression?: | No |
Operating System: | Win, 64bit | Easy fix?: | No |
Pull Request or Patch supplied: | No | Resolution: | end of life |
Crashes QGIS or corrupts data: | No | Copied to github as #: | 22189 |
Description
Using QGIS 2.12.3 (Win64bit) with contextual WMS-legends doesn't work!
The WMS-Counterpart is a patched and working UMNMapserver 7.0 - Examples:
QGIS sends following Request with Contextual-Legends checked (grabbed from Apache-log) - non-working:
http://geodaten.metropoleruhr.de/spw/spw_web?language=ger&&SERVICE=WMS&VERSION=1.3.0&SLD_VERSION=1.1.0&REQUEST=GetLegendGraphic&FORMAT=image/png&LAYER=oepnv_linien&STYLE=&BBOX=300000,5620000,440000,5770000&CRS=EPSG:25832
In order to work well in UMN-mapserver-logic, QGIS needs to send one more parameter-set (WIDTH and HEIGHT of the mapcanvas in px).
http://www.mapserver.org/de/development/rfc/ms-rfc-101.html
Moreover the BBOX seems to be wrong, IMHO this should be an dynamic parameter in getlegend-requests, whether the one QGIS seems to be static! In my last example the requests BBOX is the mapextent from the service. For each zooming- and panning-action, there is send a requests to the service, but BBOX doesn't change.
Please Review the function. THX
History
#1 Updated by Giovanni Manghi over 8 years ago
- Status changed from Open to Feedback
it works fine here on Master on both Linux and Windows.
#2 Updated by Benjamin Schepers over 8 years ago
Did you use the above mentioned Service for your test?
(http://geodaten.metropoleruhr.de/spw/spw_web)
I tried OsGeo4W and Standalone on Windows and also the Ubuntu-Version - always the latest Release 2.12.3.
No success! Do you have another service to crosscheck this for me, wehether this is an issue with above service?
Maybe this relates to a WFS bug posted by me: #11968?
I know, this are different service-providers, but both have in common not to pass the new BBOX after panning to the services.
#3 Updated by Jürgen Fischer over 8 years ago
Benjamin Schepers wrote:
Did you use the above mentioned Service for your test?
No - he said master (ie. 2.13)
#4 Updated by Benjamin Schepers over 8 years ago
Hi,
please apologize the misunderstanding.
So I installed "qgis-dev" (2.13.0-93) with OSGeo4W - this should be the "QGIS-Master", shouldn't it?
But - sorry for that - also with this version no luck with contextual legends!
#5 Updated by Giovanni Manghi over 8 years ago
Benjamin Schepers wrote:
Hi,
please apologize the misunderstanding.So I installed "qgis-dev" (2.13.0-93) with OSGeo4W - this should be the "QGIS-Master", shouldn't it?
But - sorry for that - also with this version no luck with contextual legends!
see attached images (Linux and Windows, QGIS master)
#6 Updated by Benjamin Schepers over 8 years ago
- File contextual_legend.jpg added
- File legends_compare.jpg added
Hi,
please have a look at my screenshots.
To be clear I mean adding a WMS and checking the box "Use contextual WMS legend" (-> "contextual_legend.jpg")!
My install: OSGeo4W 64bit; master from last night - 101
See "legends_compare.jpg":
1. WMS contextual legends do not work
2. default (contextual unchecked!) legends do work
According to my experience i made with 2.12.3 (see the first post):
contextual legends can't work, because there are some missing parameters in the getlegend-request. Without theese parameters mapserver can't answer the request properly. I checked the logs on the WMS-server-side again (request from master - see incoming request at the server: [16/Feb/2016:07:42:44 +0100] "GET /spw/spw_web?language=ger&&SERVICE=WMS&VERSION=1.3.0&SLD_VERSION=1.1.0&REQUEST=GetLegendGraphic&FORMAT=image/png&LAYER=oepnv_linien&STYLE=&BBOX=300000,5620000,440000,5770000&CRS=EPSG:25832 HTTP/1.1" 200 568 "-" "Mozilla/5.0 QGIS/2.13.0-Master")!
I'm not the developer of that QGIS-code and I'm also unable to help there (THX to everyone who can and does!!!), so I can't say something about the reasons what's exactly (not) happening inside QGIS. But I can analyze the bahaviour, post errors and help debugging.
@Giovanni, your screenshots do not prove that it works (Sorry ;-)), if you zoom in, legend should have thinned out to e.g. just the Bus-lines (the green ones).
#7 Updated by Giovanni Manghi over 8 years ago
- Status changed from Feedback to Open
#8 Updated by Giovanni Manghi over 7 years ago
- Regression? set to No
- Easy fix? set to No
#9 Updated by Giovanni Manghi over 5 years ago
- Resolution set to end of life
- Status changed from Open to Closed
End of life notice: QGIS 2.18 LTR
Source:
http://blog.qgis.org/2019/03/09/end-of-life-notice-qgis-2-18-ltr/
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