Le samedi 19 septembre 2009 à 06:31, Andrew Errington a écrit : > It works! I can now programmatically produce a list of lat/lon pairs for > amenities regardless of whether they are nodes or areas. If they are > areas then I use Renaud's code to calculate an average lat and average > lon, which produces an adequate centroid. Actually, if someone can > suggest how to sum (and count) all but the first or last lat/lon pair it > would make the result better, since the first and last pair are identical > (to close the area) they weight the average.
You can filter your node ref list first, so your <xsl:variable name="nodes" select="../no...@id=current()/nd/@ref]"/> will become <xsl:variable name="noderefs" select="nd[not(@ref=preceding- sibling::nd/@ref)]"/> <xsl:variable name="nodes" select="../no...@id=$noderefs/@ref]"/> (the first variable is not required, you can do it in a single xpath if you like) this way you select an nd element only if it does not have a preceding sibling with the same @ref, so you have each only once. -- Renaud Michel _______________________________________________ newbies mailing list [email protected] http://lists.openstreetmap.org/listinfo/newbies
