[OSM-talk] New tool in Potlatch 2 for areas that share a way

[M∡rtin Koppenhoefer]

2011/1/31 Steve Bennett <stevagewp at gmail.com>:
> I'd like to have a better understanding of support for multipolygons
> across different renderers and editors. For example, does mapnik
> support mp's on *all* tags, or is it case-by-case?


AFAIK they are conversed into single polygons on DB-import, so they
should work with all kinds of tags.


> I think I agree with your earlier point that mp's are better than
> colinear ways, but colinear ways are still better than parallel ways
> for areas that do actually touch.


Yes, parallel ways are actually to be considered errors in the case
that the polygons really do touch, while colinear ways are simply less
elegant but not wrong. I fear though, that laziness will lead to
people identifying features as touching, when they actually aren't in
the real world (e.g. between 2 fields there is often some rough area,
sometimes with a waterway running along, and personally I prefer
mapping these fine details, even though it is more work then
approximating the situation).

cheers,
Martin