[GRASS-dev] [GRASS GIS] #2848: g.gui.vdigit: snapping distance seems to only be defined in map units, not screen pixels

[GRASS GIS]

#2848: g.gui.vdigit: snapping distance seems to only be defined in map units, not
screen pixels
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 Reporter:  mlennert          |      Owner:  grass-dev@…
     Type:  defect            |     Status:  new
 Priority:  major             |  Milestone:  7.0.3
Component:  wxGUI             |    Version:  svn-releasebranch70
 Keywords:  vector, digitize  |        CPU:  Unspecified
 Platform:  Unspecified       |
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 Using g.gui.vdigit in trunk and in 7.0.3rc1, I only seem to be able to
 define snapping distance in map units, not in screen pixels:

 * Go to the digitizing parameters, 'General' tab
 * Change snapping threshold to any value, choosing screen pixels as unit

 => The translation to meters below always corresponds to the exact same
 number you set as threshold in screen pixels. And testing through actual
 digitization shows that the snapping threshold is in map units, whichever
 unit you chose in the parameters.

 Setting priority to major as snapping is an important tool in topological
 vector editing, but the tool remains usable.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2848>
GRASS GIS <https://grass.osgeo.org>