On 27/03/2008 10:56, Sebastian Spaeth wrote: > I wonder whether some context can be drawn in from whether there is a > administrative city boundary or residential landuse area surrounding a > street. But this would of course increase the parsing complexity a lot, > I guess.
It's a whole different algorithm. The name finder works purely on proximity at the moment (except for is_in - see previous mail). But I agree this would be very desirable. A fundamental problem though is that the data isn't there very widely in the maps to support this at present. I have in mind a piece of work I'm loosely calling "finding the urban envelope" which would analyse areas based on highway=residential and abutters, where present, and other relevant clues, to heuristically determine contiguous settlements. This would give us the kind of linkage we'd need to do what you're suggesting. It would also I think give us: - a tool to semi-automatically base drawing of the polygons for landuse=residential (or better, a new landuse=urban) for the background that some people are putting in manually now (but are actually not the norm AFAICS); - a way of estimating settlement size/population which could be used to better label maps - possibly a way of weighting journey times in route planners David _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
