On Fri, 2006-05-05 at 19:16 +0200, Paul Scott wrote: > I could do something like this using PostGIS and PHP, but a pure PHP > solution is probably going to be a tad slow with real geometries. > Sorry about replying to my own post, but here is a postgis solution supplied off the PostGIS list (thanks David): Reproject the start and end point to a mercator (not a transverse mercator) projection, connect the points, fill in the gap with additional points (the segmentize() function would do this) and then reproject to the original projection. The following should work where a and b are the two points in your original projection. To make a rhumb between with a distance of 100m: select transform(segmentize(transform(makeline(a,b),9804)),100),4326) --Paul -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
