On 10/25/10 2:58 PM, Emilie Laffray wrote:
On 25 October 2010 12:49, Mike N. <[email protected] <mailto:[email protected]>> wrote:> Multiple is_in=* tags. How is this different from the normal argument that is_in is obsolete because the object is contained within an admin boundary and the applicable is_in can be derived during a geo-query? +1If a polygon exists, the is_in information can be inferred easily through a small preprocessing.
it's not small preprocessing if you're trying to do some bulk operation. computing geometric intersections/containment is no big deal for small data sets, but scales damn poorly. richard
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