On 13/07/2012 16:05, Jochen Topf wrote:
On Fri, Jul 13, 2012 at 03:24:47PM +0200, Even Rouault wrote:
That sounds reasonable. But we need to agree on what is valid and what is
treated as invalid. In the testsuite of closed ways that I commited to
github I defined an output for every case, but I'm not sure if the inputs
are valid. My guess would be:
1) Definitely valid
OK
2) valid
Why do you need to reverse the winding order ? I thought that the WKT convention
Winding order should not be changed IMHO. It might mean something in specific
cases, who knowns? It could be an optional feature.
Jochen
Is there not a problem with making winding order significant, as a
particular way can be shared between adjacent polygons? For example the
common boundary between two admin areas. For the polygon on the left,
the points within the way must be ordered north-to-south (for clockwise
winding) whereas the polygon on the right will require south-to-north.
Colin
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