Thanks for the suggestions. I was starting down the path you suggest of creating nodes from the polygons and the ST_ConstranedDelaunayTriangles() but I decided to post my question here first in case I was missing some existing PostGIS goodness.
I couldn't get pprepair to build on Ubuntu 20.04. Possibly too new of a cgal version: 717 | void remove_constraint(Constraint_id cid) /usr/include/CGAL/Constrained_triangulation_plus_2.h:717:8: note: candidate expects 1 argument, 2 provided Thanks, Rich On Wed, Oct 27, 2021 at 11:35 AM Darafei "Komяpa" Praliaskouski < m...@komzpa.net> wrote: > Hey, > > In the past I've used https://github.com/tudelft3d/pprepair for this kind > of data. Nowadays you can node the linework, take the > ConstranedDelaunayTriangles of it and reassign all of the triangles to > closest polygons to re-union back to simulate it. > > On Wed, Oct 27, 2021 at 8:15 PM Richard Greenwood < > richard.greenw...@gmail.com> wrote: > >> I would like to automate the cleanup of a vector later. Neither ST_Snap() >> nor ST_SnapToGrid() are doing it for me. I've got a little sketch below in >> which I've attempted to illustrate my problem with ST_SnapToGrid(). The >> green lines represent the vector layer that I'd like to clean up. I'd like >> the four vertices to be snapped together. The red lines represent the grid. >> So in this case the four vertices all fall in different grid cells and no >> snapping occurs despite the vertices being closer together than the grid >> size. The data is irregular so setting an origin will not be of much use. >> Any suggestions? >> [image: image.png] >> -- >> Richard W. Greenwood >> www.greenwoodmap.com >> _______________________________________________ >> postgis-users mailing list >> postgis-users@lists.osgeo.org >> https://lists.osgeo.org/mailman/listinfo/postgis-users >> > _______________________________________________ > postgis-users mailing list > postgis-users@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/postgis-users > -- Richard W. Greenwood www.greenwoodmap.com
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