[Qgis-user] Clipping tool takes a lot of time

[Bernhard Ströbl]

Hm,

goes pretty fast here, both with PostGIS and shp layers (some 5 lines, 1 
polygon, both layers in the same CRS as the project, shp on local drive)
QGIS 2.4 64 bit on Win7

Bernhard

Am 14.10.2014 02:49, schrieb Mike Flannigan:
>
> I am also using QGIS 2.4 64b Chugiak on Windows 7.
> The same thing happens to me.  Even when I create
> a line layer with only 11 lines and try to clip 3
> of them with a polygon layer, the progress bar just
> goes back and forth for ever.
>
> I didn't run it for hours to see what would eventually
> happen.
>
> Mike
>
>
> I might be doing something wrong.
>
> On 10/13/2014 8:02 AM, qgis-user-request at lists.osgeo.org wrote:
>> Hi,
>> I am trying to clip a road network by a polygon in a script using the
>> algorithm 'qgis:clip'. The result seems to be quite ok but it takes an
>> incredible long time to produce, about 14 hours (!). The road network
>> shapefile consists of about 5000 features (not very many, I believe) and
>> the clipping shapefile consists of one single polygon. When using
>> Vector =>
>> Geoprocessing Tools => Clip from the QGIS menu, the time required is
>> about
>> the same. Does anyone have a clue why it takes so long time? Are there
>> other clip tools that I may try? I?ve been looking at the
>> 'gdalogr:ogr2ogr'
>> algorithm and its clipsrc function but not got it to work properly
>> yet. I?m
>> using QGIS 2.4 Chugiak on Windows 7 with 2.5 GHz processor. Thankful for
>> all hints that may help,
>> /Jonas
>


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