Thanks Mike for your reply.
After clipping I'm doing a dissolve. The clipping takes 5 min, which is
more or less acceptable for 2.8 million shapes.
But the dissolve is taking over 30 min. for 680k shapes.
I've added a spatial index using
dsShapefile.ExecuteSQL("CREATE SPATIAL INDEX ON " + layerNa
On 11 September 2017 at 21:09, Paul Meems wrote:
> I have a large shapefile with over 2.8 million shapes (fishnet) and I have a
> border file with only 1 multipolygon.
>
> I'm trying to clip the fishnet with the border.
> Using code is takes about 5 min. using command line it takes even longer.
>
Can't really help you with the OGR part, however, I wrote utilities do
solve this (really) fast for calculating grids based on this type of
intersection.
Speed is often a matter of using specific tools utilizing the
characteristics of the problem, i.c. the fishnet regularities.
Can you share the sh
I have a large shapefile with over 2.8 million shapes (fishnet) and I have
a border file with only 1 multipolygon.
I'm trying to clip the fishnet with the border.
Using code is takes about 5 min. using command line it takes even longer.
This is my command:
ogr2ogr fishnetClipped.shp fishnet.shp -
