Answer by geocodezip for Parse coordinates out of XML feed

1. Get the content of that XML element into a string. Note that with the "cap" namespace you will have to write browser independent code (different browsers treat that differently).

2. split the string on spaces (""):

   var coordinates = polygonElemStr.split("");

3. split each set of coordinates on the comma (","), create a google.maps.LatLng from the two numbers and push it onto an array:

   var path = [];for (var i=0; i<coordinates.length; i++) {  var coord = coordinates[i].split(",");  path.push(new google.maps.LatLng(parseFloat(coord[0]),                                   parseFloat(coord[1])));}

4. use that array of coordinates to create your polygon.

example