I am trying to display and center a map for the users current location. Everything works fine if I manually enter a hard coded latitude and longitude, but these needs to be dynamic as one user often changes location.
I suspect I am making a basic mistake, but my logic seems like it is correct to me. Please check my work and let me know what I am doing wrong? The line that is remarked out with Latitude and Longitude is the line I want to use instead of the previous line with the hard coded values.
<!DOCTYPE html>
<html>
<head>
<title>W123</title>
<meta http-equiv='Content-Type' content='text/html; charset=utf-8'/>
</head>
<body>
<div id='printoutPanel'></div>
<div id='myMap' style='width: 100vw; height: 100vh;'></div>
<script type='text/javascript'>
function showlocation() {
navigator.geolocation.getCurrentPosition(getLocation);
}
function getLocation(position) {
var latitude = position.coords.latitude;
var longitude = position.coords.longitude;
}
function loadMapScenario() {
var mapOptions = {
credentials: 'My API key code goes here',
center: new Microsoft.Maps.Location(39.1887643719098, -92.8261546188403),
//center: new Microsoft.Maps.Location(latitude, longitude),
mapTypeId: Microsoft.Maps.MapTypeId.road,
zoom: 8
};
var map = new Microsoft.Maps.Map(document.getElementById('myMap'), mapOptions);
var urlTemplate = 'http://mesonet.agron.iastate.edu/cache/tile.py/1.0.0/nexrad-n0q-{timestamp}/{zoom}/{x}/{y}.png';
var timestamps = ['900913-m50m', '900913-m45m', '900913-m40m', '900913-m35m', '900913-m30m', '900913-m25m', '900913-m20m', '900913-m15m', '900913-m10m', '900913-m05m', '900913'];
var tileSources = [];
for (var i = 0; i < timestamps.length; i++) {
var tileSource = new Microsoft.Maps.TileSource({
uriConstructor: urlTemplate.replace('{timestamp}', timestamps[i])
});
tileSources.push(tileSource);
}
var animatedLayer = new Microsoft.Maps.AnimatedTileLayer({ mercator: tileSources, frameRate: 500 });
map.layers.insert(animatedLayer);
}
</script>
<script type='text/javascript' src='http://www.bing.com/api/maps/mapcontrol?branch=experimental&callback=loadMapScenario' async defer></script>
</body>
</html>
You want to pass in the latitude and longitude into your loadMapScenario
function as seen below
function loadMapScenario(latitude,longitude) {
....your code here....
}
Change your callback in the bing map include to a new function like "mapUserLocation" then have mapUserLocation perform the following tasks
function mapUserLocation() {
// code here to get the latitude and longitude from users position
loadMapScenario(latitude,longitude);
}