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<div dir="ltr" data-setdir="false">Hi Markus, Thanks for your reply - sure. In current and previous successful runs of the disjoint operation in v.select I have input shapefile subsets of up to 2 GB in file size (file size just the shp file extension itself - not dbf etc.). Shapefiles of 2.5 GB size failed and had to be split. These correspond to 10,659,000 features and 12,159,000 features respectively. I don't believe that the error is linked to any intrinsic limitation of the shapefile format as I also receive the same error when I input to Grass the (unsplit) polygon datasets in geojson or geopackage format.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Best wishes, Chris</div><div dir="ltr" data-setdir="false"><br></div>
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On Thursday, 20 May 2021, 16:48:14 BST, Markus Neteler <neteler@osgeo.org> wrote:
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<div><div dir="ltr">Hi Chris,<br clear="none"><br clear="none">On Thu, May 20, 2021 at 2:00 PM Christopher Lloyd<br clear="none"><<a shape="rect" ymailto="mailto:chrislloyd2@yahoo.co.uk" href="mailto:chrislloyd2@yahoo.co.uk">chrislloyd2@yahoo.co.uk</a>> wrote:<br clear="none">><br clear="none">> Hi Markus, Having split my input data into smaller sized shp files, these now process fine using v.select. So clearly the problem that I had lies with some file size limitation with the v.select 'disjoint' algorithm - also failing with one input file prior using the v.extract algorithm. The original (large) input files input to grass ok using v.in.ogr,<br clear="none"><br clear="none">The vector limit is as follows:<br clear="none"><br clear="none"><a shape="rect" href="https://grasswiki.osgeo.org/wiki/GRASS_GIS_Performance#Large_vector_data_processing" target="_blank">https://grasswiki.osgeo.org/wiki/GRASS_GIS_Performance#Large_vector_data_processing</a><br clear="none">--> In all GRASS versions, the limit with topology is at time 2^31 - 1<br clear="none">(about 2 billion) features per vector map.<div class="yqt5427676299" id="yqtfd94288"><br clear="none"><br clear="none">> but then failed when using v.select. Might you be able to indicate the file size limitation for the v.select algorithm and the reasons for this? Thanks.</div><br clear="none"><br clear="none">This said, perhaps v.select lacks a proper declaration?<br clear="none"><br clear="none">Could you tell us how many vector features per map you are dealing<br clear="none">with (say: those which work and those which fail)?<br clear="none"><br clear="none">Best wishes, Markus<div class="yqt5427676299" id="yqtfd60449"><br clear="none"></div></div></div>
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