On 1/3/2016 2:24 PM, Mikoláš Štrajt wrote:
I am developing my own rendering software and I struggled on decoding
multipolygon relations. It seems to be bit tricky. I tried to found
some info about it, but all I found is this wiki page:
http://wiki.openstreetmap.org/wiki/Relation:multipolygon/Algorithm
Can you point to some example of code decoding multipolygons? I would
especially like something that will be written with renderer in mind
(ie source code is part of some renderer).
Note that my software decodes OSM XML file itself, I don't want to use
PostGIS as backend.
libosmium, osm2pgsql, and imposm all have implementations of converting
multipolygon relations to geometries.
I would recommend using libosmium in your software if at all possible,
rather than trying to decode OSM PBFs and XML yourself.
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