[Qgis-user] complete a polygon

[Mike Shand]

Tata,

You have two options;
1. Use the Trace Edit 
<http://darrencope.com/2011/10/13/qgis-trace-edit-tool/> plug-in tool to 
speed up retracing the common edge
2. Digitise as a line shapefile then use geoprocessing to convert lines 
to polygons

It is important when digitising that you are very accurate and use 
Snapping at all times to avoid slithers or overlaps.

Mike


On 06/03/2014 11:29, SIT delle Riserve Naturali di Legambiente Sicilia 
wrote:
> Dear Saber, thank you!
> But this tools allows me to complete a polygon "inside" another.
> I'm searching for a tool that alow me to complete a polygon outside 
> another, that has common sides
> If I have polygon 1 and 2, andI wan to to digitize polygon 3, I'm 
> searching a tool that allow me to digitize pol 3 without redraw the 
> common sides with 1 and 2 (in thi case ise very simple redraw,, but 
> with complex and natural polygons it is an heavy WORK!!)
> Thank you.
>
> Tata
> Il 06/03/2014 11:14, Saber Razmjooei ha scritto:
>> If I have understood your question correctly, you can use AutoTrace plugin.
>>
>> See more details here:
>> http://www.lutraconsulting.co.uk/resources/autotrace
>>
>> Cheers
>> Saber
>>
>> On 6 Mar 2014 10:05, SIT delle Riserve Naturali di Legambiente Sicilia<sit at legambienteriserve.it>  wrote:
>>> Hi,
>>> I have to add a new polygon to other existing; they have obviously
>>> common sides; how can I draw only sides not common?
>>> Thank you
>>>
>>> Tata Livreri
>>>
>>> -- 
>>> ****************************************
>>> Legambiente Comitato Regionale Siciliano
>>> Ufficio Gestione Riserve
>>> Sistema Informativo Territoriale
>>> tel 0916262697 - 0906264139
>>> www.legambienteriserve.it  
>>> via Tripoli 3 - Palermo 90138
>>> ******************************************
>>>
>>> _______________________________________________
>>> Qgis-user mailing list
>>> Qgis-user at lists.osgeo.org  
>>> http://lists.osgeo.org/mailman/listinfo/qgis-user  
>
> -- 
> ****************************************
> Legambiente Comitato Regionale Siciliano
> Ufficio Gestione Riserve
> Sistema Informativo Territoriale
> tel 0916262697 - 0906264139
> www.legambienteriserve.it
> via Tripoli 3 - Palermo 90138
> ******************************************

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