[OSM-talk] Coordinate transforms
lists at lorp.org
Thu Apr 27 01:03:01 BST 2006
Richard's posting of the IoW outline makes me wonder about we can all do
similar things for data sources we have access to.
Is there a page on the wiki (or elsewhere) on methods for transforming
coordinates between OSGB and WGS84 lat-long? It would be very helpful to
have such a guide and for people to share experiences, for both the
technical and legal aspects, so people can decide how to build this
stuff into their projects.
It would also be super to offer a web-based transformation service, i.e.
text files of coordinate lists uploaded, and transformed coordinates
generated, ideally with an indication of the algorithm (and any accuracy
Right now I'd like to have a version in PHP to use in my web projects. I
already implemented the algorithms in  in C, although without the
datum shift. It looks like using the whole of  is the way to go. Is
this the only realistic method? Is it free of IP consequences in the
If anyone has any tips on using the OS methods below or something else I
would be pleased to hear, along with any accuracy warnings for their
 "OS: A guide to coordinate systems in Great Britain", Appendix C
 OS "Quest Developer" Coorindate Transformer (includes )
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