Develop Reference

Cant get my marker's latLng to use in L.Routing.control

guys
I been trying to get my markers latlon when user double click on it but still don't get any results. Been trying other methods but i think this is the most accurate since i dont get any error when executing js
Any recommendation pls
var places = [
["LOCATION_1", 8.9856146341374, -79.51102268985925],
["LOCATION_2", 8.984640842221594, -79.51383510471848],
["LOCATION_3", 8.972080043026754, -79.5529245611453],
["LOCATION_4", 9.052896045979661, -79.4515923525883],
["LOCATION_5", 9.053366385577624, -79.50832832626823]
];
var map = L.map('map', {
center: [9.352867999999996, -79.689331],//[35.791188, -78.636755],
zoom: 9,
layers:L.tileLayer('http://{s}.google.com/vt/lyrs=m&x={x}&y={y}&z={z}',{
maxZoom: 20,
subdomains:['mt0','mt1','mt2','mt3']
})
});
for (var i = 0; i < places.length; i++) {
marker = new L.marker([places[i][1], places[i][2]])
.bindPopup(places[i][0])
.addTo(map);
}
function getdest(){
L.marker.on('dblclick',function(e){
var latlng_dest=e.latlng() });
console.log(latlng_dest)
return latlng_dest
}
navigator.geolocation.getCurrentPosition(function(location) {
var latlng_orig = new L.LatLng(location.coords.latitude, location.coords.longitude);
L.Routing.control({
waypoints: [
//L.latLng(9.10607301250145, -79.34754531445351),
L.latLng(latlng_orig)
//,L.latLng(latlng_dest)
//,L.latLng(9.100769244670843, -79.35099352767948)
,L.latLng(getdest())
]
}).addTo(map)
});

You have many common things wrong:
e.latlng() is not a function it is a property e.latlng
L.marker.on('dblclick',function(e){ this makes no sense. You creating a new instance of a Marker without coords and then adding a listener to it.
You can't return a value in a function from a listener. The listener is not called at the moment you return the value L.marker.on('dblclick',function(e){ var latlng_dest=e.latlng() }); return latlng_dest
Your code should look like that:
for (var i = 0; i < places.length; i++) {
marker = new L.marker([places[i][1], places[i][2]])
.bindPopup(places[i][0])
.addTo(map)
.on('dblclick', function(e) {
waypoints.push(e.latlng);
routeControl.setWaypoints(waypoints);
});
}
var routeControl = L.Routing.control({
waypoints: [],
}).addTo(map);
var waypoints = [];
navigator.geolocation.getCurrentPosition(function(location) {
var latlng_orig = new L.LatLng(location.coords.latitude, location.coords.longitude);
waypoints.push(latlng_orig);
});

IE Issue of Google Maps Marker Animation

I am using google maps api v3.
The Below code i am trying to run , It is working on all Browsers except IE.
Can u please suggest any changes needed to work in IE.
Fiddle Link
My Code is :
var map;
var mapOptions = { center: new google.maps.LatLng(0.0, 0.0), zoom: 2,
mapTypeId: google.maps.MapTypeId.ROADMAP };
var markers = [];
function initialize() {
map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
from1 = new google.maps.LatLng(0,0);
to1 = new google.maps.LatLng(30,12);
from2 = new google.maps.LatLng(-30,15);
to2 = new google.maps.LatLng(10,-100);
from3 = new google.maps.LatLng(0,-50);
to3 = new google.maps.LatLng(0,50);
addMarker(from1,to1);
addMarker(from2,to2);
addMarker(from3,to3);
}
function addMarker(pos, dest) {
var marker = new google.maps.Marker({
map: map,
position: pos,
destination: dest
});
google.maps.event.addListener(marker, 'click', function(event) {
fromLat = this.position.lat();
fromLng = this.position.lng();
toLat = this.destination.lat();
toLng = this.destination.lng();
// store a LatLng for each step of the animation
frames = [];
for (var percent = 0; percent < 1; percent += 0.01) {
curLat = fromLat + percent * (toLat - fromLat);
curLng = fromLng + percent * (toLng - fromLng);
frames.push(new google.maps.LatLng(curLat, curLng));
}
move = function(marker, latlngs, index, wait, newDestination) {
marker.setPosition(latlngs[index]);
if(index != latlngs.length-1) {
// call the next "frame" of the animation
setTimeout(function() {
move(marker, latlngs, index+1, wait, newDestination);
}, wait);
}
else {
// assign new route
marker.position = marker.destination;
marker.destination = newDestination;
}
}
// begin animation, send back to origin after completion
move(marker, frames, 0, 20, marker.position);
});
markers.push(marker);
}
google.maps.event.addDomListener(window, 'load', initialize);

After some fiddling it looks like a typing issue. Because you haven't implicitly declared the variable frames as a var ie is unsure that it is an array, thus the error "Object does not support method push".
You simply need to change:
frames = [];
to:
var frames = [];
Tested in ie 8- 10.

Remove markers out of viewport

I have to manage a map of about 80.000 markers concentrated in France.
To do that, I decided to get the bounds of the viewport and call a dynamic-JSON (with PHP) which contains the markers inside the viewport. And this on the "idle" event.
I faced a problem with this solution. Indeed, the markers which already exist was re-plotted (at the same position), which consequently weigh the map for nothing...
To solve it, the markers list before and after the JSON query are compared (thanks to jQuery), in order to plot only the new markers. And it works!
Now, I would want to remove the markers which are not currently shown on the map. Or a list of markers (I get it thanks to jQuery) designated by an ID which is also the title of the marker. So, how can a delete markers like that ? I specify that I am using MarkerManager.
Otherwise, you guess that if I do not remove these markers, they will be re-plotted in some cases... For example, you are viewing the city A, you move the map to view the city B, and you get back to the city A...
Here is the code:
var map;
var mgr;
var markers = [];
function initialize(){
var mapOptions = {
zoom: 6,
center: new google.maps.LatLng(46.679594, 2.109375)
};
map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
var mgrOptions = { borderPadding: 50, maxZoom: 15, trackMarkers: false };
mgr = new MarkerManager(map, mgrOptions);
google.maps.event.addListener(map, 'idle', function() {
mapEvent();
});
}
function mapEvent(){
if( map.getZoom() >= 8 ){
var bounds = map.getBounds();
getSupports(bounds.getNorthEast(), bounds.getSouthWest());
} else {
// Todo
}
}
var markerslistID = new Array();
var markerslistData = {};
function getSupports(ne, sw){
newMarkerslistID = new Array();
newMarkerslistData = {};
// Getting the markers of the current view
$.getJSON('./markerslist.php?nelat='+ne.lat()+'&nelng='+ne.lng()+'&swlat='+sw.lat()+'&swlng='+sw.lng(), function(data) {
for (var i = 0; i < data.points.length; i++) {
var val = data.points[i];
newMarkerslistID.push(val.id);
newMarkerslistData[val.id] = new Array(val.lat, val.lng, val.icon);
}
// List of New Markers TO PLOT
var diffNewMarkers = $(newMarkerslistID).not(markerslistID).get();
// List of Old markers TO REMOVE
var diffOldMarkers = $(markerslistID).not(newMarkerslistID).get();
// Plotting the NEW MARKERS
for( var i = 0; i < diffNewMarkers.length; i++ ){
var marker = new google.maps.Marker({
position: new google.maps.LatLng(newMarkerslistData[diffNewMarkers[i]][0], newMarkerslistData[diffNewMarkers[i]][1]),
title : diffNewMarkers[i],
icon : './images/'+newMarkerslistData[diffNewMarkers[i]][2]+'.png'
});
mgr.addMarker(marker, 0);
}
/*****************************************
HERE WE HAVE TO REMOVE
THE MARKERS CONTAINED IN diffOldMarkers
*****************************************/
mgr.refresh();
// Switching the new list to the old, for the next event
markerslistID = newMarkerslistID;
markerslistData = newMarkerslistData;
});
}
Thank you for your help.

A one-liner to hide all markers that ar not in the current viewport.
!map.getBounds().contains(marker.getPosition()) && marker.setVisible(false);
Or,
if (map.getBounds().contains(marker.getPosition()) && !marker.getVisible()) {
marker.setVisible(true);
}
else if (!map.getBounds().contains(marker.getPosition()) && marker.getVisible()) {
marker.setVisible(false);
}

Show a moving marker on the map

I am trying to make a marker move(not disappear and appear again) on the map as a vehicle moves on the road.
I have two values of latLng and I want to move the marker between the two till the next point is sent by the vehicle. And then repeat the process again.
What I tried:[This is not a very efficient way, I know]
My thought was to implement the above using the technique in points below:
1) Draw a line between the two.
2) Get the latLng of each point on 1/10th fraction of the polyline.
3) Mark the 10 points on the map along with the polyline.
Here is my Code:
var isOpen = false;
var deviceID;
var accountID;
var displayNameOfVehicle;
var maps = {};
var lt_markers = {};
var lt_polyLine = {};
function drawMap(jsonData, mapObj, device, deleteMarker) {
var oldposition = null;
var oldimage = null;
var arrayOflatLng = [];
var lat = jsonData[0].latitude;
var lng = jsonData[0].longitude;
//alert(jsonData[0].imagePath);
var myLatLng = new google.maps.LatLng(lat, lng);
if (deleteMarker == true) {
if (lt_markers["marker" + device] != null) {
oldimage = lt_markers["marker" + device].getIcon().url;
oldposition = lt_markers["marker" + device].getPosition();
lt_markers["marker" + device].setMap(null);
lt_markers["marker" + device] = null;
}
else {
console.log('marker is null');
oldimage = new google.maps.MarkerImage(jsonData[0].imagePath,
null,
null,
new google.maps.Point(5, 17), //(15,27),
new google.maps.Size(30, 30));
oldposition = myLatLng;
}
}
var image = new google.maps.MarkerImage(jsonData[0].imagePath,
null,
null,
new google.maps.Point(5, 17), //(15,27),
new google.maps.Size(30, 30));
lt_markers["marker" + device] = new google.maps.Marker({
position: myLatLng,
icon: image,
title: jsonData[0].address
});
if (oldposition == myLatLng) {
alert('it is same');
lt_markers["marker" + device].setMap(mapObj);
mapObj.panTo(myLatLng);
}
else {
alert('it is not same');
var markMarker = null;
var i = 10;
for (i = 10; i <= 100; i + 10) {
//-------
// setTimeout(function() {
if (markMarker != null) {
markMarker.setMap(null);
markMarker = null;
}
alert('inside the loop');
var intermediatelatlng = mercatorInterpolate(mapObj, oldposition, myLatLng, i / 100);
alert('Intermediate Latlng is :' + intermediatelatlng);
arrayOflatLng.push(intermediatelatlng);
var flightPath = new google.maps.Polyline({
path: arrayOflatLng,
strokeColor: "#FFFFFF",
strokeOpacity: 1.0,
strokeWeight: 1
});
flightPath.setMap(mapObj);
if (i != 100) {
markMarker = new google.maps.Marker({
position: intermediatelatlng,
icon: image,
title: jsonData[0].address,
map: mapObj
});
}
else {
markMarker = new google.maps.Marker({
position: intermediatelatlng,
icon: oldimage,
title: jsonData[0].address,
map: mapObj
});
}
mapObj.panTo(intermediatelatlng);
//--------
// }, 1000);
}
}
}
function mercatorInterpolate(map, latLngFrom, latLngTo, fraction) {
// Get projected points
var projection = map.getProjection();
var pointFrom = projection.fromLatLngToPoint(latLngFrom);
var pointTo = projection.fromLatLngToPoint(latLngTo);
// Adjust for lines that cross the 180 meridian
if (Math.abs(pointTo.x - pointFrom.x) > 128) {
if (pointTo.x > pointFrom.x)
pointTo.x -= 256;
else
pointTo.x += 256;
}
// Calculate point between
var x = pointFrom.x + (pointTo.x - pointFrom.x) * fraction;
var y = pointFrom.y + (pointTo.y - pointFrom.y) * fraction;
var pointBetween = new google.maps.Point(x, y);
// Project back to lat/lng
var latLngBetween = projection.fromPointToLatLng(pointBetween);
return latLngBetween;
}
Problems Faced:
1) The marker is not showing up on the map because the process of plotting and removal of marker is so fast that the marker is not visisble on screen. I've tried setTimeOut, and It does not help at all.
2) if I alow the browser to run this code for more than 5 minutes, the browser crashes.
Note: The Above function is called every 10 seconds using setInterval.
What Can be a better solution? Please Help..

For the marker to move relatively smoothly, you need to
Update more than every 1/10 fraction of the polyline (at least every few pixels)
Call the update method more frequently
Don't delete and re-add the marker
For example, something like:
var counter = 0;
interval = window.setInterval(function() {
counter++;
// just pretend you were doing a real calculation of
// new position along the complex path
var pos = new google.maps.LatLng(35, -110 + counter / 100);
marker.setPosition(pos);
if (counter >= 1000) {
window.clearInterval(interval);
}
}, 10);
I made a simple example at http://jsfiddle.net/bmSbU/2/ which shows a marker moving along a straight path. If this is what you want, most of your code above regarding where along the line you are can be reused (or check out http://broady.github.io/maps-examples/points-along-line/along-directions.html )

You can use marker-animate-unobtrusive library to make markers
smoothly transition from one location to another (instead of reappearing).
You could initialize your marker like that:
var marker = new SlidingMarker({
//your original marker options
});
Just call marker.setPosition() each time new vehicle's coordinate arrive.
P.S. I'm the author of the library.

Why not keep the existing Marker/ MarkerImage and call setPosition() to move it, either on a timer or as the position changes?
Deleting it & recreating it is what causes it to flash/ flicker and eventually crash. If you keep the same instance but just move it, you should do much better.
See: Marker.setPosition()
https://developers.google.com/maps/documentation/javascript/reference#Marker

Extend Google Maps marker to animate smoothly on update?

Using the Google Maps API v3 I've been able to update multiple positions of markers via an AJAX call. However, it lacks any transition. Code below:
if ( !latlong.equals( point.latlong ) ) {
point.latlong = latlong;
point.marker.setPosition(latlong);
}
The drawback is that setPosition has no native animation method. Does anyone know any methods for extending setPosition so the marker can fluently "move" from it's old to new position? Or any methods available? I have not been able to find any documentation. Thanks!

I did not find any native way to create this animation. You can create your own animation by stepping the position from the current point to the final point using the setPosition. Here is a code snippet to give you an idea:
var map = undefined;
var marker = undefined;
var position = [43, -89];
function initialize() {
var latlng = new google.maps.LatLng(position[0], position[1]);
var myOptions = {
zoom: 8,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
marker = new google.maps.Marker({
position: latlng,
map: map,
title: "Your current location!"
});
google.maps.event.addListener(map, 'click', function(me) {
var result = [me.latLng.lat(), me.latLng.lng()];
transition(result);
});
}
var numDeltas = 100;
var delay = 10; //milliseconds
var i = 0;
var deltaLat;
var deltaLng;
function transition(result){
i = 0;
deltaLat = (result[0] - position[0])/numDeltas;
deltaLng = (result[1] - position[1])/numDeltas;
moveMarker();
}
function moveMarker(){
position[0] += deltaLat;
position[1] += deltaLng;
var latlng = new google.maps.LatLng(position[0], position[1]);
marker.setPosition(latlng);
if(i!=numDeltas){
i++;
setTimeout(moveMarker, delay);
}
}
This can probably be cleaned up a bit, but will give you a good start. I am using JavaScript's setTimeout method to create the animation. The initial call to 'transition' gets the animation started. The parameter to 'transition' is a two element array [lat, lng]. The 'transition' function calculates the step sizes for lat and lng based upon a couple of animation parametes (numDeltas, delay). It then calls 'moveMarker'. The function 'moveMarker' keeps a simple counter to indicate when the marker has reached the final destination. If not there, it calls itself again.
Here is a jsFiddle of the code working: https://jsfiddle.net/rcravens/RFHKd/2363/
Hope this helps.
Bob

In case you want smooth animations (with easing), these libraries should help:
https://github.com/terikon/marker-animate-unobtrusive
http://terikon.github.io/marker-animate-unobtrusive/demo/unobtrusive/markermove-sliding.html

I know its late but it might help the future SO wanderers.
Problem Statement: write a function(and not a library due to specific use-case) to animate a google maps marker to a new location.
Solution is based on this awesome library marker-animate-unobtrusive
function animateMarkerTo(marker, newPosition) {
var options = {
duration: 1000,
easing: function (x, t, b, c, d) { // jquery animation: swing (easeOutQuad)
return -c *(t/=d)*(t-2) + b;
}
};
window.requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
window.cancelAnimationFrame = window.cancelAnimationFrame || window.mozCancelAnimationFrame;
// save current position. prefixed to avoid name collisions. separate for lat/lng to avoid calling lat()/lng() in every frame
marker.AT_startPosition_lat = marker.getPosition().lat();
marker.AT_startPosition_lng = marker.getPosition().lng();
var newPosition_lat = newPosition.lat();
var newPosition_lng = newPosition.lng();
// crossing the 180° meridian and going the long way around the earth?
if (Math.abs(newPosition_lng - marker.AT_startPosition_lng) > 180) {
if (newPosition_lng > marker.AT_startPosition_lng) {
newPosition_lng -= 360;
} else {
newPosition_lng += 360;
}
}
var animateStep = function(marker, startTime) {
var ellapsedTime = (new Date()).getTime() - startTime;
var durationRatio = ellapsedTime / options.duration; // 0 - 1
var easingDurationRatio = options.easing(durationRatio, ellapsedTime, 0, 1, options.duration);
if (durationRatio < 1) {
marker.setPosition({
lat: (
marker.AT_startPosition_lat +
(newPosition_lat - marker.AT_startPosition_lat)*easingDurationRatio
),
lng: (
marker.AT_startPosition_lng +
(newPosition_lng - marker.AT_startPosition_lng)*easingDurationRatio
)
});
// use requestAnimationFrame if it exists on this browser. If not, use setTimeout with ~60 fps
if (window.requestAnimationFrame) {
marker.AT_animationHandler = window.requestAnimationFrame(function() {animateStep(marker, startTime)});
} else {
marker.AT_animationHandler = setTimeout(function() {animateStep(marker, startTime)}, 17);
}
} else {
marker.setPosition(newPosition);
}
}
// stop possibly running animation
if (window.cancelAnimationFrame) {
window.cancelAnimationFrame(marker.AT_animationHandler);
} else {
clearTimeout(marker.AT_animationHandler);
}
animateStep(marker, (new Date()).getTime());
}