Hi
I see that I forgot to create polygons from the splitted lines
Sp the syntax should be something like:
ST_ExteriorRing((ST_Dump(ST_Polygonize(ST_LineMerge(ST_Union(ST_Force2D(geometry>)).geom)
Hi Ari and Andreas,
Thanks for the information. I will check it out. Today I advanced a
lit
Hi Ari and Andreas,
Thanks for the information. I will check it out. Today I advanced a little
by almost implementing what's been proposed in my message there.
Regards,
Chao
On Wed, Apr 15, 2020 at 3:04 PM Ari Jolma wrote:
> Andreas Oxenstierna kirjoitti 15.4.2020 klo 9.03:
>
> Hi
>
> Have you
Andreas Oxenstierna kirjoitti 15.4.2020 klo 9.03:
Hi
Have you tested PostGIS?
ST_ExteriorRing((ST_Dump(ST_LineMerge(ST_Union(ST_Force2D(geometry>).geom)
should extract the points you want to keep by splitting at
intersections - but it may fail in very complex cases. Then I would
start wi
Hi
Have you tested PostGIS?
ST_ExteriorRing((ST_Dump(ST_LineMerge(ST_Union(ST_Force2D(geometry>).geom)
should extract the points you want to keep by splitting at intersections
- but it may fail in very complex cases. Then I would start with a
ST_SnapToGrid with a quite high tolerance to l
Hi,
I wrote a method to a Polygon class (in Python) that solves that problem
because the ones in GEOS via Shapely did not seem good enough. My method
was based on no published algorithm but just my own reasoning, it is
probably not optimal speed-wise. I did not perform formal testing on it
bu
Dear all,
Does anyone have some experience or is aware of some algorithm that can
find and clip the inner loop formed in a polygon ? I attach one example
here. In this case I would only keep the outer points and drop the ones
that make an inner loop. I am developing some algorithm to simulate
wild
