I'm not sure if it is of any help, but with http://yournavigation.org (which also uses OSM) you can specify which distance algorithm to use. It uses this PHP class for the calculations: https://github.com/treffynnon/Geographic-Calculations-in-PHP Available methods: Vincenty Simplified great circle Haversine Cosine Add a &v= parameter to the request to choose the algorithm: http://wiki.openstreetmap.org/wiki/YOURS#Parameters /offtopic: I see YOURS should be upgraded with the new class... On 31/07/2014 18:21, Andrzej Popowski wrote:
Hi Gerd,
I have looked at your example file in QGIS and Global Mapper and they show distance like JOSM. I don't know why there is so big difference. My guess is that it could be caused by spherical versus ellipsoidal model of the Earth. Maybe you could test algorithms based on Vincenty's formulae? See for example:
http://www.gavaghan.org/blog/free-source-code/geodesy-library-vincentys-form...