[Qgis-developer] more advanced editing tools

Angelos Tzotsos gcpp.kalxas at gmail.com
Thu Nov 29 08:28:00 PST 2012

On 11/29/2012 02:35 PM, Bernhard Ströbl wrote:
> Dear list,
> during a course I realized that my institution needs some more editing 
> tools for advanced editing tasks e.g.
> - prolong a line
> - cut polygon with feature (line or polygon) from another layer
> - save all layers being in editing mode in one go
> - some more
> A little background: when digitizing data we are not starting from 
> scratch but are digitzing on existing data in many different layers 
> (parcels, restricted areas ...). A new polygon normally needs to fit 
> into these existing boundaries. Trying to digitize along existing 
> boundaries of several layers and snapping to them is cumbersome and 
> you are very likely missing snapping nodes (even when using trace 
> digitize plugin).
> Is any of you aware of similar functions in a plugin (I know 
> cadTools)? Is anyone interested in joining me to create such tools as 
> a Python plugin? Which functions would you like to have?
> regards
> Bernhard
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Hi Bernhard,

Excellent timing, I was thinking about creating a new functionality that 
I need for a parcel digitization project.
One tool I have in mind is parallel moving of a side of a polygon in 
order to achieve a specific area for the polygon (and at the same time 
maintain topological integrity with near polygons.


Angelos Tzotsos
Remote Sensing Laboratory
National Technical University of Athens

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