<?php
	/**
	  * Helpers to process geo coordinates
	  */
	class GeoUtils {

		/**
		  * Convert latitude into Degrees, Minutes, Seconds
		  * @param $i Latitude
		  */
		public function getDMSLatitude($i) {
			$d = ($i>0) ? 'N' : 'S';
			return $this->gpsconv_dec_dms($i) . ' ' . $d;		
		}

		/**
		  * Convert longitude into Degrees, Minutes, Seconds
		  * @param $i Longitude
		  */
		public function getDMSLongitude($i) {
			$d = ($i>0) ? 'E' : 'W';
			return $this->gpsconv_dec_dms($i) . ' ' . $d;		
		}

		/**
		  * Convert from decimal to Degrees, Minutes, Seconds
		  */
		private function gpsconv_dec_dms( $fl_deg ) {
			// assume input is in the form "123.45678"
			$fl_deg = abs( $fl_deg );
			while ( $fl_deg > 360.0 ) { 
				$fl_deg -= 360.0; 
			}
			$deg = intval( $fl_deg );
			$fl_secs = 3600.0 * ( $fl_deg - floatval( $deg ) );
			$min = intval( $fl_secs / 60.0 );
			$fl_fract = ( $fl_secs / 60.0 ) - floatval( $min );
			$sec = round( 60.0 * $fl_fract );		
			if ( $sec < 10 ) { 
				$sec = '0' . $sec; 
			}
			return( "$deg&deg; $min' $sec\"" );
		}	
	}
?>