![]() ![]() This worked very well even on the full national dataset, with some few errors that seem due to bad underlying data. It also turns out that in QGIS the menu item Tools > Geometry Tools > Simplify Geometries will export a simplified shapefile of any geometry and add it as a layer to your current project. In PostGIS Douglas-Peucker is implemented as simplify, the syntax, detailed here at, is some variant of: SELECT transform (simplify (transform (thegeom, 2249), 500),4326) from thegeotable. SELECT transform(simplify(transform(the_geom, 2249), 500),4326) from the_geo_table ![]() In PostGIS Douglas-Peucker is implemented as simplify, the syntax, detailed here at, is some variant of: ![]() The goal is to start with something like this: There are some simple ways to access implementations of it in PostGIS and QGIS that I thought I would add here for those who come across this post with a similar question. Douglas-Peucker is definitely the right approach. ![]()
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