[GRASS-user] damaged vector

[Vincent Bain]

Reply to myself (and maybe a ticket opening, let me know). I work on a
fresh build of grass7_trunk, here is the problem:

There might be something wrong with the digitizer, especially with the
ability to remove vertices. If you accidentally (I mean it's a nonsense)
attemp to remove a vertex to a two-vertices line, then digitizer and gui
immediately crash.

After rebuilding the map, running v.report allows you to identify a
zero-length segment. Notice this wrong line cannot be removed by v.clean
and its dedicated rmline option (anyone know why?). Running v.edit with
tool=delete you can remove the zero-length line, then everything runs
fine again for your map.

Hope this can help people puzzled by this rather frequent issue (at
least for me ;-)).

Vincent.



Le mercredi 01 mars 2017 à 13:40 +0100, Vincent Bain a écrit :
> Dear Grass users/devs,
> 
> while moving/deleting vertices on a line vector map, I was kicked out of
> my wxdigit session. As often in this case the map is damaged, with the
> warning : "Coor files of vector map <cbn2017 at vincent> is larger than it
> should be (7762 bytes excess)"
> 
> I don't really know how the error can be investigated, or if it's
> possible to edit the file to correct the erroneous feature... but this
> time I finally tried to retrieve my data (a load of contour lines) with
> v.extract. I succeeded and could keep on working avoiding to loose quite
> a massive data.
> 
> My question is : is there a /more regular/ way to resolve this frequent
> issue?
> 
> Thanks,
> Vincent.
> 
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/grass-user