I copy source code of an example of an overlayed polyline from Google Maps API and it doesn't show anything when I execute that code from an .htm file.
I've been learning about html, javascript and CSS but I can't solve this answer by myself.
Here's the code I have so far:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Google Maps JavaScript API v3 Example: Polyline Simple</title>
<link href="/maps/documentation/javascript/examples/default.css" rel="stylesheet">
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<script>
function initialize() {
var myLatLng = new google.maps.LatLng(0, -180);
var mapOptions = {
zoom: 3,
center: myLatLng,
mapTypeId: google.maps.MapTypeId.TERRAIN
};
var map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
var flightPlanCoordinates = [
new google.maps.LatLng(37.772323, -122.214897),
new google.maps.LatLng(21.291982, -157.821856),
new google.maps.LatLng(-18.142599, 178.431),
new google.maps.LatLng(-27.46758, 153.027892)
];
var flightPath = new google.maps.Polyline({
path: flightPlanCoordinates,
strokeColor: '#FF0000',
strokeOpacity: 1.0,
strokeWeight: 2
});
flightPath.setMap(map);
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas"></div>
</body>
</html>
Its working you just can't see it. Add the following style to it:
#map_canvas{
height:500px;
}
Fiddle: http://jsfiddle.net/ax6wg/
Related
I am trying to create a map with markers.
But in the below code I can't see the markers.
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps - pygmaps </title>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?libraries=visualization&sensor=true_or_false"></script>
<script type="text/javascript">
function initialize() {
var centerlatlng = new google.maps.LatLng(37.427000, -122.145000);
var myOptions = {
zoom: 16,
center: centerlatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
var latlng = new google.maps.LatLng(37.427000, -122.145000);
var img = new google.maps.MarkerImage('C:\Python27\lib\site-packages\gmplot\markers\D8BFD8.png');
var marker = new google.maps.Marker({
title: "no implementation",
icon: img,
position: latlng
});
marker.setMap(map);
var latlng = new google.maps.LatLng(37.428000, -122.146000);
var img = new google.maps.MarkerImage('C:\Python27\lib\site-packages\gmplot\markers\6495ED.png');
var marker = new google.maps.Marker({
title: "no implementation",
icon: img,
position: latlng
});
marker.setMap(map);
var latlng = new google.maps.LatLng(37.429000, -122.144000);
var img = new google.maps.MarkerImage('C:\Python27\lib\site-packages\gmplot\markers\000000.png');
var marker = new google.maps.Marker({
title: "no implementation",
icon: img,
position: latlng
});
marker.setMap(map);
}
</script>
</head>
<body style="margin:0px; padding:0px;" onload="initialize()">
<div id="map_canvas" style="width: 100%; height: 100%;"></div>
</body>
</html>
For example: C:\Python27\lib\site-packages\gmplot\markers\6495ED.png exists by the way. I can see that there are images but images dont appear on the map. Can anyone say how can I fix this situation?
Your path is incorrect. Change it with for example this URL.
https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png
and you will see markers.
You can find more about marker icons here
https://developers.google.com/maps/documentation/javascript/examples/icon-complex?hl=ru
I had an issue with something similar recently and just using forward slashes instead of back slashes fixed it
I want to create a map with circle overlay using Google Maps API which is similar to the below site:
[link]https://whypoll.crowdmap.com/
I am able to add circle layer to the Google Map API. Could anyone tell me how to get the count inside the circle. For example here it should print 1 inside the circle.
Thanks in Advance.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>Circle Overlay</title>
<style type="text/css">
#map {
width: 1200px;
height: 775px;
}
</style>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBdTuWJjEUMvQZ6VVPGksE12XNgQgs__Qk&sensor=false&libraries=visualization"></script>
<script type="text/javascript">
/**
* Called on the initial page load.
*/
function init() {
var mapCenter = new google.maps.LatLng(23.30, 80.00);
var map = new google.maps.Map(document.getElementById('map'), {
'zoom': 5,
'center': mapCenter,
draggable: false,
disableDefaultUI: true,
'mapTypeId': google.maps.MapTypeId.ROADMAP
});
var marker = new google.maps.Marker({
// map: map,
position: new google.maps.LatLng(18.7000, 79.1833),
draggable: false
});
var circle = new google.maps.Circle({
map: map,
radius: 100000,
strokeColor: "#FF0000",
fillColor: "#FF0000",
fillOpacity: 0.35,
strokeWeight: 2,
strokeOpacity: 0.8
});
// Since Circle and Marker both extend MVCObject, you can bind them
// together using MVCObject's bindTo() method. Here, we're binding
// the Circle's center to the Marker's position.
// http://code.google.com/apis/maps/documentation/v3/reference.html#MVCObject
circle.bindTo('center', marker, 'position');
}
// Register an event listener to fire when the page finishes loading.
google.maps.event.addDomListener(window, 'load', init);
</script>
</head>
<body>
<div id="map"></div>
</body>
</html>
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How to highlight a user's current location in google maps?
Is there any method to get blue circle marker in current location using javascript google maps api?
You can use the GeolocationMarker library. It is part of the Google Maps API Utility Library.
Use the navigator.geolocation approach, and use a custom icon for your blue circle
https://developer.mozilla.org/en-US/docs/Using_geolocation
https://developers.google.com/maps/documentation/javascript/overlays#Icons
EDIT:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Google Maps User Location</title>
<script src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>
<style>
html, body, #map_canvas{width:100%;height:100%;}
</style>
</head>
<body onload="locate()">
<div id="map_canvas"></div>
</body>
<script>
var im = 'http://www.robotwoods.com/dev/misc/bluecircle.png';
function locate(){
navigator.geolocation.getCurrentPosition(initialize,fail);
}
function initialize(position) {
var myLatLng = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
var mapOptions = {
zoom: 4,
center: myLatLng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById('map_canvas'),
mapOptions);
var userMarker = new google.maps.Marker({
position: myLatLng,
map: map,
icon: im
});
}
function fail(){
alert('navigator.geolocation failed, may not be supported');
}
</script>
</html>
The map displays 2 markers, one with geolocation coordinates and the other one with some random coordinates. I can't extend the bounds to fit both markers in the map. What's wrong? thank you in advance.
<!DOCTYPE html>
<html>
<head>
<title>Google Maps JavaScript API v3 Example: Map Geolocation</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=yes">
<meta charset="UTF-8">
<link href="https://google-developers.appspot.com/maps/documentation/javascript/examples/default.css"
rel="stylesheet" type="text/css">
<script type="text/javascript"
src="https://maps.googleapis.com/maps/api/js?sensor=true"></script>
<script type="text/javascript">
var map;
function initialize() {
var myOptions = {
zoom: 18,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_canvas'),
myOptions);
// Try HTML5 geolocation
if(navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
var geolocation = new google.maps.Marker({position: pos, map: map, title: 'Your geolocation', });
var latitude=47.03249;
var longitude=28.833747;
var pos2=new google.maps.LatLng(latitude,longitude);
var geolocation2 = new google.maps.Marker({position: pos2,map: map,title: 'Your geolocation',});
var pos3=new google.maps.LatLng((position.coords.latitude+latitude)/2,(position.coords.longitude+longitude)/2);
map.setCenter(pos3);
bounds.extend(geolocation.getPosition());
bounds.extend(geolocation2.getPosition());
map.fitBounds(bounds);
},
function() {handleNoGeolocation(true);});
}
else {handleNoGeolocation(false);
}
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="map_canvas" style='width:400px; height:400px;'></div>
</body>
</html>
your bounds needs to be a google.maps.LatLngBounds object.
You don't ever construct it.
Add (somewhere before you call extend on it):
var bounds = new google.maps.LatLngBounds();
BTW - you should be getting javascript errors that make this really clear.
Using the Google Maps API v3: How do I change the mouse cursor when I mouseover on a particular area?
Yes, this is possible by setting draggableCursor in MapOptions, as in the following example:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps v3 Change Cursor Demo</title>
<script src="http://maps.google.com/maps/api/js?sensor=false"
type="text/javascript"></script>
</head>
<body>
<div id="map" style="width: 500px; height: 350px"></div>
<script type="text/javascript">
var map = new google.maps.Map(document.getElementById("map"), {
mapTypeId: google.maps.MapTypeId.ROADMAP,
zoom: 8,
center: new google.maps.LatLng(-34.3, 150.6)
});
var ne = new google.maps.LatLng(-34.00, 150.00);
var nw = new google.maps.LatLng(-34.00, 150.50);
var sw = new google.maps.LatLng(-35.00, 150.50);
var se = new google.maps.LatLng(-35.00, 150.00);
var boundingBox = new google.maps.Polyline({
path: [ne, nw, sw, se, ne],
strokeColor: '#FF0000'
});
boundingBox.setMap(map);
google.maps.event.addListener(map, 'mousemove', function(event) {
if ((event.latLng.lat() > se.lat()) && (event.latLng.lat() < ne.lat()) &&
(event.latLng.lng() > ne.lng()) && (event.latLng.lng() < sw.lng())) {
map.setOptions({ draggableCursor: 'crosshair' });
}
else {
map.setOptions({ draggableCursor: 'url(http://maps.google.com/mapfiles/openhand.cur), move' });
}
});
</script>
</body>
</html>
If you run the above example, the cursor would change to a cross hair once the mouse is moved inside the red rectangle.
Other answers advising to to put 'mousemove' listeners on the whole map object will work but are wrong. This is 'heavy handed' and a bad idea as listeners like these can add up in a real application and when combined with other things happening on your map, can cause serious performance problems and possibly unforeseen race conditions!
The BEST way to do this is to use the google.maps.Polygon class. This allows you to pass a series of LatLng objects to create a Polygon. This polygon is rendered on the map and has a default mouseover attribute of 'pointer', you can add a 'mouseover' listener to the object returned from the new google.maps.Polygon class call.
The source below is from this example
http://code.google.com/apis/maps/documentation/javascript/examples/polygon-simple.html
var myLatLng = new google.maps.LatLng(24.886436490787712, -70.2685546875);
var myOptions = {
zoom: 5,
center: myLatLng,
mapTypeId: google.maps.MapTypeId.TERRAIN
};
var bermudaTriangle;
map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
var triangleCoords = [
new google.maps.LatLng(25.774252, -80.190262),
new google.maps.LatLng(18.466465, -66.118292),
new google.maps.LatLng(32.321384, -64.75737)
];
bermudaTriangle = new google.maps.Polygon({
paths: triangleCoords,
strokeColor: "#FF0000",
strokeOpacity: 0.8,
strokeWeight: 3,
fillColor: "#FF0000",
fillOpacity: 0.35
});
bermudaTriangle.setMap(map);
Then I can add the listener like this
google.maps.event.addListener(bermudaTriangle, 'mouseover', function() {
map.setZoom(8);
});
//now if you mouse over the Polygon area, your map will zoom to 8