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openlayers

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Build tools and sources for developing OpenLayers based mapping applications

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goog.require('ol.Map'); goog.require('ol.Overlay'); goog.require('ol.View'); goog.require('ol.layer.Tile'); goog.require('ol.source.TileJSON'); goog.require('ol.source.TileUTFGrid'); var key = 'pk.eyJ1IjoiYWhvY2V2YXIiLCJhIjoiRk1kMWZaSSJ9.E5BkluenyWQMsBLsuByrmg'; var mapLayer = new ol.layer.Tile({ source: new ol.source.TileJSON({ url: 'https://api.tiles.mapbox.com/v4/mapbox.geography-class.json?secure&access_token=' + key }) }); var gridSource = new ol.source.TileUTFGrid({ url: 'https://api.tiles.mapbox.com/v4/mapbox.geography-class.json?secure&access_token=' + key }); var gridLayer = new ol.layer.Tile({source: gridSource}); var view = new ol.View({ center: [0, 0], zoom: 1 }); var mapElement = document.getElementById('map'); var map = new ol.Map({ layers: [mapLayer, gridLayer], target: mapElement, view: view }); var infoElement = document.getElementById('country-info'); var flagElement = document.getElementById('country-flag'); var nameElement = document.getElementById('country-name'); var infoOverlay = new ol.Overlay({ element: infoElement, offset: [15, 15], stopEvent: false }); map.addOverlay(infoOverlay); var displayCountryInfo = function(coordinate) { var viewResolution = /** @type {number} */ (view.getResolution()); gridSource.forDataAtCoordinateAndResolution(coordinate, viewResolution, function(data) { // If you want to use the template from the TileJSON, // load the mustache.js library separately and call // info.innerHTML = Mustache.render(gridSource.getTemplate(), data); mapElement.style.cursor = data ? 'pointer' : ''; if (data) { flagElement.src = 'data:image/png;base64,' + data['flag_png']; nameElement.innerHTML = data['admin']; } infoOverlay.setPosition(data ? coordinate : undefined); }); }; map.on('pointermove', function(evt) { if (evt.dragging) { return; } var coordinate = map.getEventCoordinate(evt.originalEvent); displayCountryInfo(coordinate); }); map.on('click', function(evt) { displayCountryInfo(evt.coordinate); });