FYI, I'm hoping to have the Proj4js (or cscs) library finished up in a few weeks so you should also be able to use that to convert point coords between projections, and do the math in map projected space.
Proj4js is a port of Proj4 to Javascript, and will use spatialreference.org for lookup of projection parameters, if a particular projection isn't known already and it includes datum transforms. Mike Erik Uzureau wrote: > PS. If anyone is considering building this and would like to share the > code with the OL repository, we would (again) be delighted. Please > contact me or any of the other PSC members and we can set you up with > wiki/trac passwords, access to a sandbox, and help you with > code/design decisions. > > > > On 8/21/07, Erik Uzureau <[EMAIL PROTECTED]> wrote: > >> all: >> >> Here is the official ticket in OL's TRAC for the path measuring tool: >> http://trac.openlayers.org/ticket/173 >> >> There is also an open ticket for an *area* measuring tool: >> http://trac.openlayers.org/ticket/782 >> >> Erik >> >> >> On 8/20/07, Chris Hardin <[EMAIL PROTECTED]> wrote: >> >>> It's been quite accurate for me. >>> >>> >>> >>> On 8/20/07, Lance Dyas <[EMAIL PROTECTED]> wrote: >>> >>>> There is accurate distance measurement using the Vincenty distance >>>> formula... >>>> Haverine is umm simulating the earth as sphere and is not accurate. >>>> What Open Layers lacks is a gui for measurement. >>>> >>>> >>> -- >>> Chris Hardin >>> Software Architect >>> Archetype Corporation >>> >>> > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users > > > _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
