[OSM-talk] routing across open spaces

[Dave F.]

On 06/12/2010 21:06, David Murn wrote:
> On Mon, 2010-12-06 at 20:56 +0000, Dave F. wrote:
>
>>>    - which, if all they
>>> know about is the perimeter, is probably a good thing.
>> Eh? I thought you said you'd "love it" if it cut directly across an area??
>>
>> They don't have to *follow* the perimeter just use it to find the best
>> exit&  then join it to the entrance to the area with a straight line.
> And as was said during the thread, what happens if theres a lake, a
> building, a playground, etc in the middle of the straight line?

As I said earlier in the thread, use multi-polygons. The router *should* 
be able to get around it (see earlier in the thread about the maths 
required to get around corners. Even without it should still be able to 
avoid blockages.

If it can't do this then it's not really fit for purpose & should be 
avoided.

>    What
> about if the 'straight line' crosses outside of the area, say for
> example if you had an L-shaped area.

Have you actually read the whole of this thread?

Dave F.