$('<div/>').addClass('centerMarker').appendTo(map.getDiv())
var mp = $('.centerMarker');
google.maps.event.addListener(mp.data('win'), 'position_changed', function(){
var locations = mp.data('win').getPosition();
});
Above code is working fine, but getPosition() retirning data is changing frequently from {H:'latdat',L:'Logdat'}, to {G:'latdat',K:'Logdat'}
And today it is not returning the latitude and longitude. Is it a mistake from google side or from my side.
I called it Incorrectly.
Below one is correct implementation
var lat = myMarker.getPosition().lat();
var lng = myMarker.getPosition().lng();
Previously if I do getPosition() i'm getting latitude and longitude. But it is not the correct way
Related
I am trying to update the coordinates of a folium map rendered by a Dash App on a callback (which is running inside a Flask App). The callback selectively renders different layers on a map - the issue is that the zoom and center coordinates are not persisted when the map is updated. The map is rendered as html and injected as in iframe into the app.
Addendum: Not a professional programmer, have only been trying my hand at this for the past six months.
I have tried three approaches:
JS API call client-side to flask route. I ended up realizing this had too much overhead (plus couldn't identify user to update the proper coordinates).
Encoding the coordinates and zoom in the URL. The URL changes as expected from this js snippet:
map_layer.on("mouseup zoomend", function(){
var coordinates = map_layer.getCenter();
var lat = coordinates.lat
var lon = coordinates.lng
var zoom = map_layer.getZoom();
parent.history.replaceState({}, '', `/app/layer?&lat=${lat}&lon=${lon}&zoom=${zoom}`);
// const ON_CHANGE = '_dashprivate_historychange';
// window.dispatchEvent(new CustomEvent(ON_CHANGE));
// parent.window.dispatchEvent(new CustomEvent(ON_CHANGE));
console.log("success");
The commented-out code also tries to dispatch a CustomEvent to dash to try and update it's history - not really clear what's happening there - just tried to emulate this approach.
The right URL is not passed on to the callback however. So despite the url changing on the browser, it's not being sent back with the updated query variables. If I refresh the page and actively send the URL, than the right URL is passed on, but that's not the kind of behavior I'm looking for - I would like for it to change with no active reloading of the page:
#layer.callback(
Output("map", "srcDoc"),
-- other inputs --,
Input('url', 'href') #tried State as well
)
def update_output_src(href):
print(href)
-- other code --
return map.get_root().render()
Using a hidden DIV to store the coordinates. The div content changes as expected from this js snippet:
map_layer.on("mouseup zoomend", function(){
var coordinates = map_layer.getCenter();
var lat = coordinates.lat
var lon = coordinates.lng
var zoom = map_layer.getZoom();
var latstore = parent.document.getElementById('latstore');
latstore.textContent = lat; #trying different approaches in what's changed to see if dash callback captures it.
var lonstore = parent.document.getElementById('lonstore');
lonstore.innerText = lon;
var zoomstore = parent.document.getElementById('zoomstore');
zoomstore.innerHTML = zoom;
console.log("success");
But again I am not able to capture the stored coordinates when the input is triggered.
#layer.callback(
Output("map", "srcDoc"),
-- other inputs --,
State('latstore', 'children'),
State('lonstore', 'children'),
State('zoomstore', 'children'),
)
def update_output_src(latstore, lonstore, zoomstore):
print(latstore, lonstore, zoomstor)
-- other code --
return map.get_root().render()
Any help or pointer in the right direction for approaches 2 or 3 would be super useful. I have been struggling with this for 3-4 days now and I'm out of ideas.
I am trying to add a new band to an image in Earth Engine APP but it doesn't appear to be working. I can get it to work for an image collection but not a single image.
Here is my code:
var test = ee.Image.expression(('VV')/('VH')).rename('test');
ee.initialize();
image = ee.Image('COPERNICUS/S1_GRD/S1A_IW_GRDH_1SDV_20170415T062305_20170415T062330_016151_01AAE9_5D0F');
var combined = image.addBands(test);
var visParams = {"opacity":1,"bands":["VV"],"min":-30,"max":10,"gamma":1};
var eeMapConfig = combined.getMap(visParams);
Does anyone have any ideas why this isn't working?
I am passing proper latitude and longitude to the map but it shows old map, having old lat lng. I know I am doing something wrong in this, but I can't figure out it. My project in ionic framework and for map I am using this plugin map plugin
This my html code
<div style="width:100%;height:200px" id="mapDisplay"></div>
This my angularJS code
var getLat = $scope.dealer.lat;
var getLng = $scope.dealer.lng;
var address = $scope.dealer.address;
var mapDiv = document.getElementById("mapDisplay");
const myGeoLocation = new plugin.google.maps.LatLng(getLat,getLng);
var map = plugin.google.maps.Map.getMap(mapDiv, {
'camera': {
'latLng': myGeoLocation,
'zoom': 15
}
});
map.addEventListener(plugin.google.maps.event.MAP_READY, function() {
map.addMarker({
'position': myGeoLocation,
'title': address
}, function(marker) {
marker.showInfoWindow();
});
});
From the docs of the map plugin you are using
This plugin generates only one map instance using the Map.getMap()
method. In general, you may want to create multiple maps, but this
plugin doesn't allow it.
So your plugin.google.maps.Map.getMap is only grabbing the existing instance, not creating a new one and the plugin.google.maps.event.MAP_READY is only fired once, the first time. However looking at the source code it looks like the instance exposes a remove method which you can use to destroy the existing instance and create a new one with the new sets of coordinates when the callback is called, e.g: map.remove(function() { /** reset map coordinates **/ }
** Extra **
If you just need to display a map with a set of coordinates you can do it using the native app by passing lat/lon to the $cordovaInAppBrowser plugin. As an example for iOS and Android you'd have the following:
iOS
$cordovaInAppBrowser.open('maps://?q=<latitude>,<longitude>', '_system');
Android
$cordovaInAppBrowser.open('geo:0,0?q=<latitude>,<longitude>', '_system');
And finally you need to enable the geo uri in your config.xml like so:
<allow-intent href="geo:*" />
The plugin doesn't allow to create multiple maps instance More detail.
But you can achieve this by using this code
var map = plugin.google.maps.Map.getMap(div);
map.clear();
map.off();
map.trigger("test");
map.addEventListener(plugin.google.maps.event.MAP_READY);
Anybody know how to show driving directions between two points using ArcGis javascript api with location co ordinates only (not with place name or address)
I need to implement driving directions to a particular point(point B) from current user location(point A, I have the user location from browser) where the destination Point B's latitude and longitude is stored in my database,,,
pls help '
You can use RouteTask to get the result.
var routeParams = new RouteParameters();
routeParams.stops = new FeatureSet();
routeParams.returnRoutes = false;
routeParams.returnDirections = true;
routeParams.directionsLengthUnits = Units.MILES;
routeParams.outSpatialReference = new SpatialReference({ wkid:102100 });
if the locations are in lat long, convert it to WebMercator using webMercatorUtils
routeParams.stops.features.add(new Graphic(pointA));
routeParams.stops.features.add(new Graphic(pointB));
You can use your own service url here if you have one.
var routeTask = new RouteTask("http://route.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World");
routeTask .solve(routeParams, function(result){
//handle route result.
}, function(err){
//handle error
});
If you are using Directions dijit, it already has methods to add Point geometry. https://developers.arcgis.com/javascript/3/jsapi/directions-amd.html#addstop
Hope this was helpful.
UPDATE : find my answer here
A little clarity on getting key values using AngularFire v2?
I looked for many sources before asking a simple question but Im just sarting with firebase and I can't manage to use the data the way I want. What I need, is to retrieve two int in my controller (how much "yes" and how much "no" linked to a question.
the data model is the following
question/id/(text, yes, no)
I have a service where I call my data using an id
app.service('QuestionService', function($firebase,$q) {
var _this = this;
//initialize Firebase
var ref = new Firebase('https://basename.firebaseio.com/question');
this.get = function(nb){
var QuestionObject = ref.child(nb);
return $firebase(QuestionObject);
};
return this;
});
I have a controller function where I call some data using a random id
$scope.pickQuestion = function(){
var randomnumber = Math.ceil(Math.random() * 3);
$scope.message = QuestionService.get(randomnumber);
};
and then it works great so I can have something like
{{message.yes}} or {{message.no}} and get the corresponding integer.
My issue, what I want to do, is to pass this "message.no" value to my controller. I don't know what to do. I can't manage to get the value directly inside the controller (it works only inside the view) and I can't manage to pass the value to my controller from the view. I tried a
ng-init="functionName({{message.yes}}, {{message.no}})"
but it return an error into the console. (however the source a displayed correctly)
Does someone could guide me into the right direction?
Thanks