Thursday, August 25, 2011

Converting UTM coordinates into latitude and longitude coordinates

The coordinates used in the raw GPS data are sometimes in the UTM (Universal
Transverse Mercator coordinate system) format.
There is a need to convert them into into latitude and longitude coordinates for reverse-geocoding with Google Map API.

There may be many ways of doing the conversion. The following are two ways:
  1. The method introduced by Salkosuo (java lib)http://www.ibm.com/developerworks/java/library/j-coordconvert/
  2. Postgis extension provides in-database conversion function.

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