ngmap
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The Simplest AngularJS Google Maps V3 Directive
92 lines (81 loc) • 3.13 kB
HTML
<html ng-app="myApp">
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<script src="script-tags-for-development.js"></script>
<script>
var app = angular.module('myApp', ['ngMap']);
app.controller('BasicCtrl1', function(NgMap) {
var TILE_SIZE = 256;
function bound(value, opt_min, opt_max) {
if (opt_min != null) value = Math.max(value, opt_min);
if (opt_max != null) value = Math.min(value, opt_max);
return value;
}
function degreesToRadians(deg) {
return deg * (Math.PI / 180);
}
function radiansToDegrees(rad) {
return rad / (Math.PI / 180);
}
function MercatorProjection() {
this.pixelOrigin_ = new google.maps.Point(TILE_SIZE / 2, TILE_SIZE / 2);
this.pixelsPerLonDegree_ = TILE_SIZE / 360;
this.pixelsPerLonRadian_ = TILE_SIZE / (2 * Math.PI);
}
MercatorProjection.prototype.fromLatLngToPoint = function(latLng,
opt_point) {
var me = this;
var point = opt_point || new google.maps.Point(0, 0);
var origin = me.pixelOrigin_;
point.x = origin.x + latLng.lng() * me.pixelsPerLonDegree_;
// Truncating to 0.9999 effectively limits latitude to 89.189. This is
// about a third of a tile past the edge of the world tile.
var siny = bound(Math.sin(degreesToRadians(latLng.lat())), -0.9999,
0.9999);
point.y = origin.y + 0.5 * Math.log((1 + siny) / (1 - siny)) *
-me.pixelsPerLonRadian_;
return point;
};
MercatorProjection.prototype.fromPointToLatLng = function(point) {
var me = this;
var origin = me.pixelOrigin_;
var lng = (point.x - origin.x) / me.pixelsPerLonDegree_;
var latRadians = (point.y - origin.y) / -me.pixelsPerLonRadian_;
var lat = radiansToDegrees(2 * Math.atan(Math.exp(latRadians)) -
Math.PI / 2);
return new google.maps.LatLng(lat, lng);
};
var vm = this;
NgMap.getMap().then(function(map) {
var numTiles = 1 << map.getZoom();
var projection = new MercatorProjection();
vm.chicago = map.getCenter();
vm.map = map;
vm.worldCoordinate = projection.fromLatLngToPoint(vm.chicago);
vm.pixelCoordinate = new google.maps.Point(
vm.worldCoordinate.x * numTiles,
vm.worldCoordinate.y * numTiles);
vm.tileCoordinate = new google.maps.Point(
Math.floor(vm.pixelCoordinate.x / TILE_SIZE),
Math.floor(vm.pixelCoordinate.y / TILE_SIZE));
});
});
</script>
</head>
<body ng-controller="BasicCtrl1 as vm">
Showing static coordinates of Chicago
<br/>
<ng-map default-style="true" center="41.850033,-87.6500523" zoom="3">
<info-window id="1" position="41.850033,-87.6500523" visible="true">
<div ng-non-bindable>
Chicago, IL<br/>
LatLng: {{vm.chicago.lat()}}, {{vm.chicago.lng()}}, <br/>
World Coordinate: {{vm.worldCoordinate.x}}, {{vm.worldCoordinate.y}}, <br/>
Pixel Coordinate: {{vm.pixelCoordinate.x}}, {{vm.pixelCoordinate.y}}, <br/>
Tile Coordinate: {{vm.tileCoordinate.x}}, {{vm.tileCoordinate.y}} at Zoom Level {{vm.map.getZoom()}}
</div>
</info-window>
</ng-map>
</body>
</html>