If I have a object containing lats and longs how can i plot them in Leaflet using the marker constructor I tried looping through them

for(key in obj){
            var val = obj[key];
            var markers = new L.Marker([val.lat, val.long]);

but its not showing up in the map

var obj ={
 0 : {
        lat: 15.606562000000000
        long: 32.513681000000000
1 : {
        lat: -12.09137
        long: 34.7182

2 Answers 2


No, you're not using the L.Marker constructor.

Constructor: L.Marker( <LatLng> latlng, <Marker options> options? )

And a L.LatLng is:

Constructor: L.LatLng( <Number> latitude, <Number> longitude)


var markers = new L.Marker(new L.LatLng(val.lat, val.long));

Additional JS tips:

  1. markers should be marker, as it is a reference to a single marker.
  2. If your indices are incremental numbers, you should consider making obj an array, and use a for loop instead of a for-in. If not, use hasOwnProperty to avoid nasty surprises.
  • And an additional tip: Don't use the global variable var for a variable that is only being used inside the loop. Better use let (for a variable that is reassigned inside the block scope) or const (for a constant that is not reassigned - like val or marker). Commented Dec 28, 2018 at 10:42
var locations = [
       ["Locations 1", 6.625117, 39.145004],
       ["Locations 2", -6.5767859, 39.1304557],
       ["Locations 3", -6.8667841, 39.2530337],
       ["Locations 4", -6.7787336, 39.2273218],
       ["Locations 5", -6.7576158, 39.2768276],

for (var i = 0; i < locations.length; i++) {
    marker = new L.marker([locations[i][1], locations[i][2]])
  • 1
    I did just like Shedrack showed, the only difference is I have my map in script tag in HTML and array is made in JavaScript. How can I display the points on map using that array? Commented Sep 15, 2021 at 13:37
  • @HalfSparrow, you will need to reference the array from the JavaScript file into the HTML file. Then you should be able to use it as seen above.
    – Umar Yusuf
    Commented Oct 18, 2021 at 7:08

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