ERP.Web/res/assets/plugins/gmaps/lib/gmaps.native_extensions.js

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//==========================
// Polygon containsLatLng
// https://github.com/tparkin/Google-Maps-Point-in-Polygon
// Poygon getBounds extension - google-maps-extensions
// http://code.google.com/p/google-maps-extensions/source/browse/google.maps.Polygon.getBounds.js
if (!google.maps.Polygon.prototype.getBounds) {
  google.maps.Polygon.prototype.getBounds = function(latLng) {
    var bounds = new google.maps.LatLngBounds();
    var paths = this.getPaths();
    var path;

    for (var p = 0; p < paths.getLength(); p++) {
      path = paths.getAt(p);
      for (var i = 0; i < path.getLength(); i++) {
        bounds.extend(path.getAt(i));
      }
    }

    return bounds;
  };
}

if (!google.maps.Polygon.prototype.containsLatLng) {
  // Polygon containsLatLng - method to determine if a latLng is within a polygon
  google.maps.Polygon.prototype.containsLatLng = function(latLng) {
    // Exclude points outside of bounds as there is no way they are in the poly
    var bounds = this.getBounds();

    if (bounds !== null && !bounds.contains(latLng)) {
      return false;
    }

    // Raycast point in polygon method
    var inPoly = false;

    var numPaths = this.getPaths().getLength();
    for (var p = 0; p < numPaths; p++) {
      var path = this.getPaths().getAt(p);
      var numPoints = path.getLength();
      var j = numPoints - 1;

      for (var i = 0; i < numPoints; i++) {
        var vertex1 = path.getAt(i);
        var vertex2 = path.getAt(j);

        if (vertex1.lng() < latLng.lng() && vertex2.lng() >= latLng.lng() || vertex2.lng() < latLng.lng() && vertex1.lng() >= latLng.lng()) {
          if (vertex1.lat() + (latLng.lng() - vertex1.lng()) / (vertex2.lng() - vertex1.lng()) * (vertex2.lat() - vertex1.lat()) < latLng.lat()) {
            inPoly = !inPoly;
          }
        }

        j = i;
      }
    }

    return inPoly;
  };
}

if (!google.maps.Circle.prototype.containsLatLng) {