Custom marker styles for imported data

Customize colors and icons of markers based on attributes in imported data.

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Custom marker styles for imported data</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.mapbox.com/mapbox.js/v3.0.1/mapbox.js'></script>
<link href='https://api.mapbox.com/mapbox.js/v3.0.1/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.streets')
  .setView([38, -95], 4);

// Omnivore will AJAX-request this file behind the scenes and parse it:
// note that there are considerations:
// - The CSV file must contain latitude and longitude values, in column
//   named roughly latitude and longitude
// - The file must either be on the same domain as the page that requests it,
//   or both the server it is requested from and the user's browser must
//   support CORS.
omnivore.csv('/mapbox.js/assets/data/airports.csv')
    .on('ready', function(layer) {
        // An example of customizing marker styles based on an attribute.
        // In this case, the data, a CSV file, has a column called 'state'
        // with values referring to states. Your data might have different
        // values, so adjust to fit.
        this.eachLayer(function(marker) {
            if (marker.toGeoJSON().properties.state === 'CA') {
                // The argument to L.mapbox.marker.icon is based on the
                // simplestyle-spec: see that specification for a full
                // description of options.
                marker.setIcon(L.mapbox.marker.icon({
                    'marker-color': '#ff8888',
                    'marker-size': 'large'
                }));
            } else {
                marker.setIcon(L.mapbox.marker.icon({}));
            }
            // Bind a popup to each icon based on the same properties
            marker.bindPopup(marker.toGeoJSON().properties.city + ', ' +
                marker.toGeoJSON().properties.state);
        });
    })
    .addTo(map);
</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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