[OSM-dev] [OSM-talk] The future of Potlatch
richard at systemeD.net
Fri May 2 18:00:34 BST 2008
> On Fri, May 02, 2008 at 03:37:57PM +0100, Richard Fairhurst wrote:
>> The other one is that it would be good if the getway call, in
> Just curious : what does this call actually do in fact?
Just gets a way and its tags, and all its nodes and their tags.
It's pretty similar to /api/0.5/way/<id>/full, it just predates it
(and as Dave says it reprojects, largely for historical reasons).
The performance issue is with Way.find(wayid). This is several times
slower than the equivalent SQL:
SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS
...I guess because it's creating Rails objects for all the nodes
along the way, or something. Because Potlatch calls this for every
single way, there's a pretty big performance hit.
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