function GpsInterface(map) {
	this.map = map; // map interface object
		
	this.elGpsInput = null;

	this._create = function() {
		this.elGpsInput = document.getElementById('actualgpsinput');
		
		if (this.elGpsInput) this.elGpsInput.value = '';
		
		this.attachEvents();
	}
	
	this.updateGPS = function(latlng) {
		if (this.elGpsInput) {
			var df = latlng.lat;
			var c = 'N';
			if (df < 0) {
				c = 'S';
				df*= -1;
			}
			var d = Math.floor(df);
			var m = ((df - d) * 60).toFixed(3);
			if (m < 10) m = '0' + m;
			if (d < 10) d = '0' + d;
			var lat = c + d + '°' + m + '\'';
			
			df = latlng.lng;
			c = 'E';
			if (df < 0) {
				c = 'W';
				df*= -1;
			}
			d = Math.floor(df);
			m = ((df - d) * 60).toFixed(3);
			if (m < 10) m = '0' + m;
			if (d < 10) d = '0' + d;
			var lng = c + d + '°' + m + '\'';
			
			this.elGpsInput.value = lat + ' ' + lng;
		}
	}
	
	this.onClickMap = function(e) {
		this.updateGPS(this.map.getLatLngFromPixel(e.xy));
	}
	
	this.attachEvents = function() {
		this.map.map.events.register('click', this, this.onClickMap);
	}
	
	this._create();
}