Bug report #11634

snapping using layer units instead of map units

Added by Gavin Fleming over 9 years ago. Updated about 9 years ago.

Affected QGIS version:2.6.0 Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:19887


In 2.6 I'm digitising 4326 data but my canvas is projected to transverse mercator i.e. map units are now metres. I set snapping tolerance to 2m using 'map units' but snapping behaves as if it is acting in degrees and snaps all over the place, completely slowing down QGIS in the process, implying that snapping is using layer units and not map units. Has QGIS behaviour changed intentionally (not good) or is this a bug?

Associated revisions

Revision 334d885b
Added by Martin Dobias about 9 years ago

Snapping tolerance: Fix "map units" vs "layer units" dilemma (fixes #11634)

Until now "map units" in snapping config dialog actually referred to layer units.
From now on, "map units" refer to project's CRS units. Where appropriate, it is
possible to choose "layer units" that refer to layer CRS units.

Projects from older versions of QGIS should be handled seamlessly (tolerances
in layer units will be still handled in layer units, not project units).

In API, QgsTolerance::MapUnits is deprecated as it is unclear to what units
it refers to (should be ProjectUnits, but actually it is LayerUnits)


#1 Updated by Martin Dobias about 9 years ago

  • Status changed from Open to Closed

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