[OSM-dev] test cases for multipolygon rendering?

[Paul Fox]

hi --

i'm finally adding relation/multipolygon rendering to RoadMap -- it's
nice to finally see _all_ of the local lakes, rather than just the
ones represented by a single way.  so far i've just implemented
the bare bones of the algorithm described at
    http://wiki.openstreetmap.org/wiki/Relation:multipolygon/Algorithm#Ring_Assignment
and it's reasonably successful.

but i know how this goes:  though it works on the OSM data i'm
currently testing with, it's sure to break when i start rendering maps
for my next major road-trip, and then i'll be scrambling to fix it.

so:  if you've worked on this problem, and know of some particularly
thorny rendering areas, i'd like to hear about them.  whether or not
i really deal with them will depend on how hard it is.  :-)

paul
=----------------------
 paul fox, pgf at foxharp.boston.ma.us (arlington, ma, where it's 46.0 degrees)