Created
August 14, 2018 13:41
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Download OSM Data from rectangle draw with different baselayers.
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Download OSM File from rectangle drag</title> | |
| <meta charset="utf-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <link rel="shortcut icon" type="image/x-icon" href="docs/images/favicon.ico" /> | |
| <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.3.3/leaflet.css" crossorigin=""/> | |
| <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous"> | |
| </head> | |
| <body> | |
| <div id="mapid" style="width:100%;bottom:0;top:0;position:absolute;"> | |
| <button type="button" class="btn btn-primary" style="z-index:1000;position:relative;margin-left: 50px;" onclick="enableDraw()">Draw Rectangle</button> | |
| <button type="button" class="btn btn-danger" style="z-index:1000;position:relative;margin-left: 5px;" onclick="removeLayer()">Remove Rectangle</button> | |
| <button type="button" class="btn btn-success" style="z-index:1000;position:relative;margin-left: 500px;" onclick="getOSM()">Get OSM Data</button> | |
| </div> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.3.3/leaflet.js" crossorigin=""></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet.draw/1.0.2/leaflet.draw.js" crossorigin=""></script> | |
| <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.bundle.min.js" integrity="sha384-pjaaA8dDz/5BgdFUPX6M/9SUZv4d12SUPF0axWc+VRZkx5xU3daN+lYb49+Ax+Tl" crossorigin="anonymous"></script> | |
| <script src="https://cdn.rawgit.com/eligrey/FileSaver.js/5ed507ef8aa53d8ecfea96d96bc7214cd2476fd2/FileSaver.min.js"></script> | |
| <script> | |
| var map = L.map('mapid').setView([49.415121, 8.673310], 13); | |
| // Add Basemaps ************ | |
| var mbAttr = 'Map data © <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, ' + | |
| '<a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' + | |
| 'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>', | |
| mbUrl = 'https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw'; | |
| var satellite = L.tileLayer(mbUrl, {id: 'mapbox.satellite', maxZoom: 22, attribution: mbAttr}).addTo(map), | |
| streetsSat = L.tileLayer(mbUrl, {id: 'mapbox.streets-satellite', maxZoom: 22, attribution: mbAttr}), | |
| streetsBasic = L.tileLayer(mbUrl, {id: 'mapbox.streets-basic', maxZoom: 22, attribution: mbAttr}), | |
| outdoors = L.tileLayer(mbUrl, {id: 'mapbox.outdoors', maxZoom: 22, attribution: mbAttr}); | |
| var baseLayers = { | |
| "Satellite": satellite, | |
| "Streets-Satellite": streetsSat, | |
| "Streets-Basic": streetsBasic, | |
| "Outdoors": outdoors | |
| }; | |
| L.control.layers(baseLayers).addTo(map); | |
| var drawnItems = new L.FeatureGroup(); | |
| map.addLayer(drawnItems); | |
| var polygonDrawer = new L.Draw.Rectangle(map); | |
| function enableDraw(){ | |
| // Draw Rectangle ************ | |
| polygonDrawer.enable(); | |
| }; | |
| // Get Extent ************ | |
| var minx, miny, maxx, maxy; | |
| map.on('draw:created', function (e) { | |
| var layer = e.layer; | |
| drawnItems.addLayer(layer); | |
| minx = layer.getBounds().getWest(); | |
| miny = layer.getBounds().getSouth(); | |
| maxx = layer.getBounds().getEast(); | |
| maxy = layer.getBounds().getNorth(); | |
| layer.editing.enable(); | |
| map.on('draw:editresize', function (e) { | |
| minx = layer.getBounds().getWest(); | |
| miny = layer.getBounds().getSouth(); | |
| maxx = layer.getBounds().getEast(); | |
| maxy = layer.getBounds().getNorth(); | |
| }) | |
| }); | |
| function removeLayer(){ | |
| // Remove Layers ************ | |
| drawnItems.clearLayers(); | |
| } | |
| function getOSM(){ | |
| // Download OSM ************ | |
| const Http = new XMLHttpRequest(); // https://medium.freecodecamp.org/here-is-the-most-popular-ways-to-make-an-http-request-in-javascript-954ce8c95aaa | |
| var baseurl = "https://api.openstreetmap.org/api/0.6/map?bbox=" | |
| var url = baseurl.concat(minx.toString(), ",", miny.toString(), ",", maxx.toString(), ",", maxy.toString()) | |
| Http.open("GET", url); | |
| Http.send(); | |
| Http.onreadystatechange=function(){ | |
| if(this.readyState==4 && this.status==200){ | |
| var filename = prompt("Enter Filename without extension", "eg. Heidelberg"); | |
| var blob = new Blob([Http.responseText], { | |
| type: "text/plain;charset=utf-8" | |
| }); | |
| saveAs(blob, filename.concat(".osm")); | |
| } | |
| } | |
| } | |
| </script> | |
| </body> | |
| </html> |
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