Marker radius search

Use the .distanceTo function to only show markers within a range

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Marker radius search</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.mapbox.com/mapbox.js/v3.1.0/mapbox.js'></script>
<link href='https://api.mapbox.com/mapbox.js/v3.1.0/mapbox.css' rel='stylesheet' />
<style>
  body { margin:0; padding:0; }
  #map { position:absolute; top:0; bottom:0; width:100%; }
</style>
</head>
<body>
<script src='https://api.mapbox.com/mapbox.js/plugins/leaflet-omnivore/v0.2.0/leaflet-omnivore.min.js'></script>
<div id='map'></div>

<script>
L.mapbox.accessToken = '<your access token here>';
var map = L.mapbox.map('map', 'mapbox.emerald')
    .setView([40, -95], 4);

var RADIUS = 500000;
var filterCircle = L.circle(L.latLng(40, -75), RADIUS, {
    opacity: 1,
    weight: 1,
    fillOpacity: 0.4
}).addTo(map);

var csvLayer = omnivore.csv('/mapbox.js/assets/data/airports.csv', null, L.mapbox.featureLayer())
    .addTo(map);

map.on('mousemove', function(e) {
    filterCircle.setLatLng(e.latlng);
    csvLayer.setFilter(function showAirport(feature) {
        return e.latlng.distanceTo(L.latLng(
                feature.geometry.coordinates[1],
                feature.geometry.coordinates[0])) < RADIUS;
    });
});
</script>
to create your own custom map and use it in this example.
Use this example by copying its source into your own HTML page and replacing the Map ID with one of your own from your projects. Having trouble with JavaScript? Try out Codecademy or contact our support team.
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