[Talk-it] mapnik ed i multipoligoni (ancora)
dieterdreist a gmail.com
Lun 16 Gen 2012 19:49:03 GMT
allora, sulla [dev]-list c'erano due risposte (in inglese, mi permetto
di incollare qui sperando che capite tutti):
1. Lennard (chi mantiene lo stylesheet di mapnik):
Well, what do you expect when you add an inner way (the building) to
an area object (the administrative region)? Never mind any additional
tags. It will be interpreted as such: a gap in the area. An enclave,
in this particular case, with an appropriate line drawn around the
So there you have it: don't add stuff to area datatypes that doesn't
belong in them.
This is what I would have expected. At least any code that I have
written will completely disregard outer/inner tags and instead find
out for itself whether something is outer or inner.
Adding anything other than rings of a polygon to a multipolygon
relation is not supported.
I know the practice of adding "admin centre" nodes or so but I don't
think it makes sense. If you really want to model this right then you
need to do:
(relation 1) is a type=whatever that represents the country
(relation 2) is a type=boundary or multipolygon that represents the
country's border or land and is member of r1 in role "border"
(node/way 3) represents the admin center and is member of r1 in role
Countries have admin centres, and countries have boundaries - not
"boundaries have admin centres", and neither "countries are
Maggiori informazioni sulla lista