utm-utils
Super Light-Weight Utility Functions for Working with Universal Transverse Mercator
mercator-projection
Translate latitude and longitude values into 'world' coordinates as used by the Google Map API.
srs
Spatial reference library for node
gauss-krueger
Convert Gauß-Krüger coordinates (GK2, GK3, GK4, GK5: EPSG:31466-EPSG:31469) to WGS84, and vice versa