Google Map Drawing freehand

Question

LATEST CODE - http://jsfiddle.net/YsQdh/88/ -

THIS VERSION USES gDouglasPe

Answer 1

function drawFreeHand()
{

    //the polygon
    poly=new google.maps.Polyline({map:map,clickable:false});
    
    //move-listener
    var move=google.maps.event.addListener(map,'mousemove',function(e){
        poly.getPath().push(e.latLng);
    });
    
    //mouseup-listener
    google.maps.event.addListenerOnce(map,'mouseup',function(e){
        google.maps.event.removeListener(move);
        var path=poly.getPath();
        poly.setMap(null);
        poly=new google.maps.Polygon({map:map,path:path});
        
        
        google.maps.event.clearListeners(map.getDiv(), 'mousedown');
        
        enable()
    });
}

function disable(){
  map.setOptions({
    draggable: false, 
    zoomControl: false, 
    scrollwheel: false, 
    disableDoubleClickZoom: false
  });
}

function enable(){
  map.setOptions({
    draggable: true, 
    zoomControl: true, 
    scrollwheel: true, 
    disableDoubleClickZoom: true
  });
}


function initialize() 
{
  var mapOptions = {
    zoom: 14,
    center: new google.maps.LatLng(52.5498783, 13.425209099999961),
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };
  map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
       
  //draw
  $("#drawpoly a").click(function(e) {
    e.preventDefault();

    disable()

    google.maps.event.addDomListener(map.getDiv(),'mousedown',function(e){
      drawFreeHand()
    });

  });

}

google.maps.event.addDomListener(window, 'load', initialize);

html,body{height:100%;margin:0}
#map_canvas{height:500px; width:100%;}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<script src="https://maps.googleapis.com/maps/api/js?sensor=false&libraries=geometry,places&ext=.js"></script>

<div id="drawpoly"><a href="#">Click Here To Draw On Map</a></div>

<div id="map_canvas"></div>

Answer 2

The latest answer - http://jsfiddle.net/YsQdh/94/

This contains the gDouglasPeuker algorithm

var theArrayofLatLng = path.j;
var ArrayforPolygontoUse= GDouglasPeucker(theArrayofLatLng,50); 
console.log("ArrayforPolygontoUse", ArrayforPolygontoUse);        


var polyOptions = {
    map: map,
    fillColor: '#0099FF',
    fillOpacity: 0.7,
    strokeColor: '#AA2143',
    strokeWeight: 2,
    clickable: false,
    zIndex: 1,
    path:ArrayforPolygontoUse,
    editable: false
}