Tim Warr’s Blog

If you are like me and grew up with Ordnance Survey maps you will have grid references ingrained in your spatial thinking and want to use them in you mapping API.  However the snag with global mapping sites and APIs (which they nearly all are now) you need to use a global projection system. for example if you are working on an application for the emergency services in the UK they will want to have a location given as a Grid Reference (Lat/Lon might as well be Greek).  So that leaves you a bit stumped?

The good news is that Multimap have recently released support for the conversion of British National Grid eastings and northings to latitudes and longitudes via the Multimap REST API.  This feature is so new it is not fully documented yet but Richard Keen’s blog has some further information and examples and there is more information on the Multimap Blog.