I created a measuring tool from scratch and integrated it into the toolbar. I use the lat and lon of the starting position and the ending position to determine the distance using the Vicenty formula. I have had success with it. I have compared it to Google's measuring tools in Google Earth and Google Maps and it is accurate within 5 feet most of the time. It works for me perfectly, if anyone is interested, I will send them the code.
On 10/16/07, Mike Adair <[EMAIL PROTECTED]> wrote: > Linda, > > Not as much as I would have liked, but I did merge Chris's changes back > into the proj4js SVN and converted some more projection class code to > the correct format for proj4js. This wouldn't involve any changes to > the OpenLayers.Projection class code that we came up with at the code > sprint, just the underlying library. I will try to update my sandbox > with that this week. I'm not sure of the progress within OL itself as > to how it uses the projection support. > > Mike > > Linda_Rawson wrote: > > Mike, > > > > I was wondering if you had made progress on this project of yours. > > > > Thanks, > > Linda > > > > Mike Adair wrote: > > > >> 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 > >> > >> > >> > > > > > > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users > -- Chris Hardin Software Architect Archetype Corporation _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
