Feature request #1740

digitize polygon/polyline snapping more than one node of another vector object

Added by flv - about 8 years ago. Updated about 2 months ago.

Status:Closed
Priority:Low
Assignee:nobody -
Category:Digitising
Pull Request or Patch supplied:No Resolution:fixed/implemented
Easy fix?:No

Description

It would be useful to digitize a polygon or a polyline snapping to a part of an existing line/polyline of another vector layer or in the same layer. For example: digitize a land use polygone snapping to a river border from first vertex (of the river) to the 30th (for a river border with 100 vertex i.e.).

History

#1 Updated by Borys Jurgiel about 8 years ago

This is implemented for polygons. You can enable 'Avoid intersections of new polygons' and then digitize, you know, 'overmuch', overlapping a part of existing polygon. Your polygon will be clipped to the existing boundary.

For lines, only way I see is Ctrl-C, Ctrl-V and then manage somehow ;)

#2 Updated by flv - about 8 years ago

Replying to [comment:1 borysiasty]:

This is implemented for polygons. You can enable 'Avoid intersections of new polygons' and then digitize, you know, 'overmuch', overlapping a part of existing polygon. Your polygon will be clipped to the existing boundary.

Yes, you're right.

For lines, only way I see is Ctrl-C, Ctrl-V and then manage somehow ;)

Yes. the problem I found is that if I try to digitize a new polygon wich has to snap to a part of a polyline I have to snap the vertex one by one. It would be useful if the user was able to select only "a part" of a polyline and then continue the digitizing away.

#3 Updated by Giovanni Manghi over 5 years ago

  • Target version changed from Version 1.7.0 to Version 1.7.4

#4 Updated by Giovanni Manghi about 5 years ago

  • Target version changed from Version 1.7.4 to Version 2.0.0

#5 Updated by Pirmin Kalberer over 4 years ago

  • Target version changed from Version 2.0.0 to Future Release - Nice to have

#6 Updated by Giovanni Manghi about 2 months ago

  • Pull Request or Patch supplied set to No
  • Easy fix? set to No

#7 Updated by Regis Haubourg about 2 months ago

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

Trace digitize plugin has been ported in QGIS (2.14 at least). It is the first icon in the advanced digitizing toolbar (a magnet).

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