On Sun, Sep 11, 2016 at 3:54 PM Paul Norman <penor...@mac.com> wrote:
> On 9/11/2016 8:20 AM, Mike N wrote: > > Given a PostGIS database populated from OSM data by osm2pgsql, and 2 > > sets of lines (such as the selection of all footways and the > > selection of all roads) what function or series of functions will > > result in a list of locations where footways cross roads without any > > OSM connecting node? (the equivalent of JOSM's "Crossing Ways" warning) > This isn't really an answer to your exact question, but I recently used Mapbox's OSM QA Tiles + Tile Reduce to find all intersections between residential/tertiary/primary/trunk/etc. roads. The code is here and can probably be adapted to what you're looking for pretty easily: https://github.com/iandees/on-every-corner
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