Bug report #13862

Labels are not displayed on Layers with "cut-outs"

Added by Yorck Neumann over 8 years ago. Updated over 8 years ago.

Status:Closed
Priority:Normal
Assignee:Nyall Dawson
Category:Labelling
Affected QGIS version:2.12.0 Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:fixed/implemented
Crashes QGIS or corrupts data:No Copied to github as #:21885

Description

Hi, I have a couple of polygons imported which have cut-outs. These cut-outs represent certain areas where no agriculture is taking place (e.g. power poles). Only for two of these polygons labels (concat(fbid, ' ', bodennutzu)) are displayed. The polygons do not have these cut outs. No labels are displayed if a polygon does have one of these cut-outs.

Attached two specimen polygons, one where the label is displayed properly (_is ok) and one where there is no label displayed. Both are entirely configurated identically.

Looking forward to a solution! Many thanks!

YN

DEMVLI076CD10025_bug_.zip - does not show any labels (4.06 KB) Yorck Neumann, 2015-11-21 12:35 PM

DEMVLI076CD10019_is_ok.zip - works fine (3.79 KB) Yorck Neumann, 2015-11-21 12:35 PM

Screenshot.PNG (2.1 MB) Yorck Neumann, 2015-11-21 12:38 PM

bugtest.PNG (555 KB) Yorck Neumann, 2015-11-21 02:09 PM

candidates.PNG (1.22 MB) Yorck Neumann, 2015-11-21 02:20 PM

overview.PNG - The only polygons displaying labels are those without cut outs (1.5 MB) Yorck Neumann, 2015-11-21 02:27 PM

show_candidates___horizontal.PNG (623 KB) Yorck Neumann, 2015-11-22 12:20 AM

Test_Project.zip (23.9 KB) Yorck Neumann, 2015-11-22 05:13 AM

Related issues

Related to QGIS Application - Bug report #13863: Complex Polygon not displayed on screen if it can not be ... Closed 2015-11-21

History

#1 Updated by Yorck Neumann over 8 years ago

#2 Updated by Nyall Dawson over 8 years ago

  • Status changed from Open to Feedback

To rule out configuration issues - can you confirm that removing the holes from these polygons results in the labels showing? It would also be useful to see a screenshot with the "show label candidates" setting enabled (it's under the arrow button in the top-right of the labeling tab).

#3 Updated by Yorck Neumann over 8 years ago

Hmm.. I'm using QGIS for about 2 days now. The polygon is being shown as ONE object. I tried to delete the cut outs by clicking on "Switch edit Status" ("Bearbeitungstatus umschalten"). Tried to mark the cut Outs, but did not succeed. Can you tell me how to do it?

#4 Updated by Yorck Neumann over 8 years ago

Here the candidates Setting - hope this is what you wanted to see...

#5 Updated by Yorck Neumann over 8 years ago

#6 Updated by Nyall Dawson over 8 years ago

I mean I need a screenshot where showing candidates is enabled. Also try modifying the placement mode from centroid to horizontal and see if that has an effect.

#7 Updated by Yorck Neumann over 8 years ago

I believe that is the setting shown in "candidates.png" posted in #4... I adjusted the setting and then re-opened the settings dialog just to show the setting. Or is it something else you wanted to see?

Further I switched to horizontal (see screenshot) without any change - label still does not appear.

Maybe the problem is also related to my second bug report #13863

I can reproduce the issue there as well. If polygon a polygon is "complex" no label is shown and the polygon disappears if it is partially moved out of the main view.

#8 Updated by Nyall Dawson over 8 years ago

Yes, but you should see grey/red rectangles all over your map when "show candidates" is enabled. Do you see that?

#9 Updated by Yorck Neumann over 8 years ago

No, I can not see any grey / red rectangles.

I have set up a new Test-Project just having a non-complex (showing the label) and a complex polygon (not showing the label) and have attached it here.

However, I am facing the same behaviour also in the Test-Project and also on my Notebook, also running QGIS 2.12. So, from my point of view, the problem is reproducable. Maybe you would want to test with the attached project (I believe if you unpack it on your Windows-Desktop it should be openable right away).

Once again, the behaviour, that the complex polygon disappears, if it is not displayable as a whole on the screen (see #13863) also happens here.

#10 Updated by Giovanni Manghi over 8 years ago

Yorck Neumann wrote:

No, I can not see any grey / red rectangles.

I have set up a new Test-Project just having a non-complex (showing the label) and a complex polygon (not showing the label) and have attached it here.

However, I am facing the same behaviour also in the Test-Project and also on my Notebook, also running QGIS 2.12. So, from my point of view, the problem is reproducable. Maybe you would want to test with the attached project (I believe if you unpack it on your Windows-Desktop it should be openable right away).

Once again, the behaviour, that the complex polygon disappears, if it is not displayable as a whole on the screen (see #13863) also happens here.

also in this project you have a layer with a polygon with unclosed rings

see also #13863-1.

this and #13863 should be closed as invalid.

#11 Updated by Giovanni Manghi over 8 years ago

  • Operating System deleted (Win 10)
  • OS version deleted (1511)
  • Target version deleted (Version 2.14)

#12 Updated by Giovanni Manghi over 8 years ago

  • Status changed from Feedback to Closed
  • Resolution set to fixed/implemented

#13 Updated by Jürgen Fischer almost 7 years ago

  • Related to Bug report #13863: Complex Polygon not displayed on screen if it can not be displayed entirely added

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