L.LatLng.UTM.js
/*
        * UTMXYToLatLon
        *
        * Converts x and y coordinates in the Universal Transverse Mercator
        * projection to a latitude/longitude pair.
        *
        * Inputs:
        *   x - The easting of the point, in meters.
        *   y - The northing of the point, in meters.
        *   zone - The UTM zone in which the point lies.
        *   southhemi - True if the point is in the southern hemisphere;
        *               false otherwise.
        *
        * Outputs:
        *   latlon - A 2-element array containing the latitude and
        *            longitude of the point, in radians.
        *
        * Returns:
        *   The function does not return a value.
        *
        */
UTMXYToLatLon
Converts x and y coordinates in the Universal Transverse Mercator
projection to a latitude/longitude pair.

The easting of the point, in meters.
y - The northing of the point, in meters.
zone - The UTM zone in which the point lies.
southhemi - True if the point is in the southern hemisphere;
false otherwise.

A 2-element array containing the latitude and
longitude of the point, in radians.

The function does not return a value.
UTMXYToLatLon Converts x and y coordinates in the Universal Transverse Mercator projection to a latitude / longitude pair . The easting of the point in meters . y - The northing of the point in meters . zone - The UTM zone in which the point lies . southhemi - True if the point is in the southern hemisphere ; false otherwise . A 2 - element array containing the latitude and longitude of the point in radians . The function does not return a value .
function UTMXYToLatLon(x, y, zone, southhemi, latlon) {
            var cmeridian;
            x -= 500000.0;
            x /= UTMScaleFactor;
            if (southhemi) y -= 10000000.0;
            y /= UTMScaleFactor;
            cmeridian = UTMCentralMeridian(zone);
            MapXYToLatLon(x, y, cmeridian, latlon);
            return;
        }
function UTMXYToLatLon ( x , y , zone , southhemi , latlon ) { var cmeridian ; x -= 500000.0 ; x /= UTMScaleFactor ; if ( southhemi ) y -= 10000000.0 ; y /= UTMScaleFactor ; cmeridian = UTMCentralMeridian ( zone ) ; MapXYToLatLon ( x , y , cmeridian , latlon ) ; return ; }
UTMXYToLatLon
 Converts x and y coordinates in the Universal Transverse Mercator
 projection to a latitude/longitude pair.
UTMXYToLatLon Converts x and y coordinates in the Universal Transverse Mercator projection to a latitude / longitude pair .
/* If in southern hemisphere, adjust y accordingly. */