Jump to content

Convert UMC to Lat/Lon


Recommended Posts

I've have the following formulae to convert latitude and longitude to UTM:


lon_utm = lon * 20037508.34 / 180

lat_utm = Math.log(Math.tan((90 + lat) * Math.PI / 360)) / (Math.PI / 180) * 20037508.34 / 180


I need the equivalent formulae to reverse this. Longitude I can do:


lon = lon_utm / 20037508.34 * 180


but I'm completely stuck on latitude (I'm a programmer not a mathematician!)


Can anybody give me some help or point me in the right direction please?

Edited by mossoi
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.