[OSM-dev] Map rendering code... API or database direct?
richard at systemeD.net
Thu Mar 30 12:47:44 BST 2006
> On 3/30/06, Raphaël Jacquot <sxpert at esitcom.org> wrote:
>> there is another better way yet, available at the sql level...
>> select all line segments that have a "foot" in the tile you're
>> interested in.
> No, the problem is that some segments don't have any "feet" in the
> current tile.
SELECT id,path FROM segments WHERE
((xmin BETWEEN $bbox_xmin AND $bbox_xmax) OR
(xmax BETWEEN $bbox_xmin AND $bbox_xmax) OR
(xmin<$bbox_xmin AND xmax>$bbox_xmax)) AND
((ymin BETWEEN $bbox_ymin AND $bbox_ymax) OR
(ymax BETWEEN $bbox_ymin AND $bbox_ymax) OR
(ymin<$bbox_ymin AND ymax>$bbox_ymax))
where xmin, xmax, ymin and ymax are the bounding box of each segment,
and $bbox_xmin, $bbox_xmax etc. are the bounding box of the current map
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