I have written an app which uses O/S maps and want to integrate GPS. I have the long and lat co's using the Location api but I need some way of converting the long and lat to eastings and northings so I can use them on my maps. The math behind these conversions is beyond my skill set. I cannot see anything in the Location api which helps and have seen some very bad (ie...dont work) examples online but nothing of much use. Does anyone know of any reliable existing libraries that I could use or even better has anyone written a function which does this conversions that they would be willing to share?
Any ideas or pointers would be really appreciated.