Feature request #1123

Ability to edit shared polygon vertices

Added by springmeyer - over 14 years ago. Updated over 13 years ago.

Assignee:nobody -
Pull Request or Patch supplied: Resolution:fixed
Easy fix?:No Copied to github as #:11183


I just posted another feature request in ticket 1122, which provides a bit of background on the use of qgis for creation and editing of data that employs shared polygon topology.

In these circumstances qgis works great to create the polygon data. One simply needs to create a large vector of the entire extent of the area of interest and then use the 'Split Features' tool to cut up the one large polygon into individual vectors ( THANKS to whomever created the split features tool!)

However, qgis would benefit in its ability to modify polygon data with adjacent vertices by the addition of the ability to edit shared vertices. Mapwindow's default shapefile editor works like this whereby it automatically treats shared vertices between adjacent polygons as the same node (must be some min tolerance setting to assume 'sharedness'), thus when the user selects a shared vertice and moves the location both boundaries of each polygon are effectively edited. This is incredibly important for maintaining correct topology of polygon data.

I'm sure my terminology here can be improved so I would be glad to resubmit this ticket with modifications to the wording, just let me know.


#1 Updated by Marco Hugentobler about 14 years ago

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

Hi springmeyer

This is already possible. Just go to Settings -> Project properties -> General (Tab) -> Digitizing (group box) and check the option 'Enable topological editing'. Now QGIS should behave as you described.


#2 Updated by springmeyer - about 14 years ago

WOW. It sure does. I confirmed the topological editing in the Mac 1.0 preview.

Thanks mhugent!!!

#3 Updated by Anonymous over 13 years ago

Milestone Version 1.0.0 deleted

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