AzureMapsCodeSamples/Samples/Geospatial Files/Drag and Drop Shapefiles onto the Map/Drag and Drop Shapefiles onto the Map.html at main · Azure-Samples/AzureMapsCodeSamples · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <title>Drag and Drop Shapefiles onto the Map - Azure Maps Web SDK Samples</title>

    <meta charset="utf-8" />
	<link rel="shortcut icon" href="/favicon.ico"/>

    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
    <meta name="description" content="This sample shows how to load zipped shapefile (.shp, .dbf, .prj) files onto the map by  dragging and dropping from a local file." />
    <meta name="keywords" content="Microsoft maps, map, gis, API, SDK, ESRI Shapefiles, shapefiles, shp, dbf, OGC, web worker, drag, drop, dropover, FileReader" />
    <meta name="author" content="Microsoft Azure Maps" /><meta name="version" content="1.0" />
    <meta name="screenshot" content="screenshot.gif" />

    <!-- Add references to the Azure Maps Map control JavaScript and CSS files. -->
    <link href="https://atlas.microsoft.com/sdk/javascript/mapcontrol/3/atlas.min.css" rel="stylesheet" />
    <script src="https://atlas.microsoft.com/sdk/javascript/mapcontrol/3/atlas.min.js"></script>

    <!-- Load in Catiline.js library which makes it easier to work with web workers. -->
    <script src="/lib/catiline/dist/catiline.min.js"></script>

    <script>
        var map, datasource, popup, shpWorker;

        function getMap() {
            //Initialize a map instance.
            map = new atlas.Map('myMap', {
                view: 'Auto',
                language: 'Auto',

                //Add authentication details for connecting to Azure Maps.
                authOptions: {
                    // Use SAS token for authentication
                    authType: 'sas',
                    getToken: function (resolve, reject, map) {
                        // URL to your authentication service that retrieves a SAS Token
                        var tokenServiceUrl = 'https://samples.azuremaps.com/api/GetAzureMapsSasToken';

                        fetch(tokenServiceUrl).then(r => r.text()).then(token => resolve(token));
                    }

                    //Alternatively, use an Azure Maps key. Get an Azure Maps key at https://azure.com/maps. NOTE: The primary key should be used as the key.
                    //authType: 'subscriptionKey',
                    //subscriptionKey: '[YOUR_AZURE_MAPS_KEY]'
                }
            });

            //Wait until the map resources are ready.
            map.events.add('ready', function () {
                //Create a style control and add it to the map.
                map.controls.add(new atlas.control.StyleControl(), {
                    position: 'top-right'
                });

                //Setup the drag & drop listeners on the map.
                var dropZone = document.getElementById('myMap');
                dropZone.addEventListener('dragover', handleDragOver, false);
                dropZone.addEventListener('drop', handleFileSelect, false);

                //Create a data source to add your data to.
                datasource = new atlas.source.DataSource();
                map.sources.add(datasource);

                //Create a popup.
                popup = new atlas.Popup();

                //Add a layers for rendering the data.
                var layers = [
                    new atlas.layer.PolygonLayer(datasource, null, {
                        filter: ['any', ['==', ['geometry-type'], 'Polygon'], ['==', ['geometry-type'], 'MultiPolygon']]	//Only render Polygon or MultiPolygon in this layer.
                    }),
                    new atlas.layer.LineLayer(datasource, null, {
                        strokeColor: 'white',
                        strokeWidth: 2,
                        filter: ['any', ['==', ['geometry-type'], 'Polygon'], ['==', ['geometry-type'], 'MultiPolygon']]	//Only render Polygon or MultiPolygon in this layer.
                    }),
                    new atlas.layer.LineLayer(datasource, null, {
                        strokeColor: 'red',
                        filter: ['any', ['==', ['geometry-type'], 'LineString'], ['==', ['geometry-type'], 'MultiLineString']]	//Only render LineString or MultiLineString in this layer.
                    }),
                    new atlas.layer.BubbleLayer(datasource, null, {
                        createIndicators: true, // to enable bubble layer a11y feature
                        filter: ['any', ['==', ['geometry-type'], 'Point'], ['==', ['geometry-type'], 'MultiPoint']] //Only render Point or MultiPoints in this layer.
                    })
                ];

                map.layers.add(layers, 'labels');

                //Add a click event to the layers to show a popup of what the user clicked on.
                map.events.add('click', layers, featureClicked);

                //Create a web worker that uses the shapefile-js library.
                var wfunc = function (base, cb) {
                    importScripts('/lib/shp.min.js');
                    shp(base).then(cb);
                };

                shpWorker = cw({ data: wfunc }, 2);
            });
        }

        function handleDragOver(evt) {
            //Stop the browser from performing its default behavior when a file is dragged and dropped.
            evt.stopPropagation();
            evt.preventDefault();

            evt.dataTransfer.dropEffect = 'copy';
        }

        function handleFileSelect(evt) {
            //Stop the browser from performing its default behavior when a file is dragged and dropped.
            evt.stopPropagation();
            evt.preventDefault();

            //Remove any existing data from the map.
            datasource.clear();

            //The list of files that have been dragged and dropped onto the map.
            var files = evt.dataTransfer.files;

            //Keep track of the bounding box of all the data from all files dropped into the map.
            var dataBounds = null;

            //Loop through and attempt to read each file.
            for (var i = 0; i < files.length; i++) {
                var reader = new FileReader();

                reader.onload = function (e) {
                    shpWorker.data(e.target.result).then(function (data) {
                        //Add the GeoJSON data to the data source.
                        datasource.add(data);

                        //Calculate the bounding box of the GeoJSON data.
                        var bounds = atlas.data.BoundingBox.fromData(data);

                        //If data is already loaded from another GeoJSON file, merge the bounding boxes together.
                        if (dataBounds) {
                            dataBounds = atlas.data.BoundingBox.merge(dataBounds, bounds);
                        } else {
                            dataBounds = bounds;
                        }

                        //Update the map view to show the data.
                        map.setCamera({
                            bounds: dataBounds,
                            padding: 50
                            });
                    });
                };

                //Read the file as text.
                reader.readAsArrayBuffer(files[i]);
            }
        }

        function featureClicked(e) {
            //Make sure the event occurred on a shape feature.
            if (e.shapes && e.shapes.length > 0) {
                var properties = e.shapes[0].getProperties();

                //By default, show the popup where the mouse event occurred.
                var pos = e.position;

                //If the shape is a point feature, show the popup at the points coordinate.
                if (e.shapes[0].getType() === 'Point') {
                    pos = e.shapes[0].getCoordinates();
                }

                //Update the content and position of the popup.
                popup.setOptions({
                    //Create a table from the properties in the feature.
                    content: atlas.PopupTemplate.applyTemplate(properties),
                    position: pos,
                    pixelOffset: [0, 0]
                });

                //Open the popup.
                popup.open(map);
            }
        }
    </script>
</head>
<body onload="getMap()">
    <div id="myMap" style="position:relative;width:100%;min-width:290px;height:600px;"></div>

    <fieldset style="width:calc(100% - 30px);min-width:290px;margin-top:10px;">
        <legend>Drag and Drop Shapefiles onto the Map</legend>
        This sample shows how to load zipped shapefile (.shp, .dbf, .prj) files onto the map by  dragging and dropping from a local file.
        This sample uses the open source <a href="https://github.com/calvinmetcalf/shapefile-js" target="_blank">Shapefile.js</a> library which converts Shapefiles into GeoJSON which can easily be consumed by the map control.
        It also makes use of the open source <a href="http://catilinejs.com/">Catiline.js</a> library which makes working with web workers easier.
    </fieldset>
</body>
</html>