Missing labels with the new labeling system

[qgib]

Author Name: Jean-Roc Morreale (@Jean-Roc)
Original Redmine Issue: 2812
Affected QGIS version: master
Redmine category:vectors

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Hi,

The new labeling system doesn't display all the labels of a layer, see the joined file for an example using an integer field for labels. The parameters used are free placement and no obstacles, activating colliding and candidate labels modify nothing.

The old labeling system displays them all, I can reproduce this problem with other layers.

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• missing_labels.tar.lzma (Jean-Roc Morreale)
• labels_test.zip (michele zanolli)

[qgib]

Author Name: Jean-Roc Morreale (@Jean-Roc)

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The bug is due to topological errors in the polygons, the labels appears when it is corrected (not self-intersection). This behavior is making the use of the new label engine harder on gps data collected with centimetric gps, if the surveyor makes a small wrong move then the data has to be manually corrected to be labeled (automatic cleaning does not give good result).

The old labelling engine works on both uncorrected an corrected data.

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• fixed_version_id was changed from Version 1.7.0 to Version 1.7.4

[qgib]

Author Name: michele zanolli (michele zanolli)

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Maybe this problem is related to the following:

I am having problems with curved labeling with my layer of lines (see attached shapefile).

Enable the advanced option "Show all labels (i.e. including colliding labels")
Try to display labels with "parallel" placement option --> ok, all labels are displayed.
Try to display labels with "curved" placement option --> I can see only 1 or 2 labels.

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• crashes_corrupts_data was configured as 0
• 4183 was configured as labels_test.zip
• version was configured as master

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• labels_test.zip (michele zanolli)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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michele zanolli wrote:

Maybe this problem is related to the following:

I am having problems with curved labeling with my layer of lines (see attached shapefile).

Enable the advanced option "Show all labels (i.e. including colliding labels")
Try to display labels with "parallel" placement option --> ok, all labels are displayed.
Try to display labels with "curved" placement option --> I can see only 1 or 2 labels.

Hi Michele, this missing curved labels should be another issue, please file a separate ticket.

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• pull_request_patch_supplied was configured as 0

[qgib]

Author Name: Paolo Cavallini (@pcav)

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• fixed_version_id was changed from Version 1.7.4 to Version 1.8.0

[qgib]

Author Name: Paolo Cavallini (@pcav)

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• fixed_version_id was changed from Version 1.8.0 to Version 2.0.0

[qgib]

Author Name: Martin Dobias (@wonder-sk)

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• assigned_to_id removed Martin Dobias

[qgib]

Author Name: Nathan Woodrow (@NathanW2)

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These are all implemented in 2.0 >

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• resolution was changed from to fixed/implemented
• status_id was changed from Open to Closed