3 <title>Find Census Tract Map</title>
4 <link rel="stylesheet" href="elements/leaflet/leaflet.css"/>
5 <script src="elements/leaflet/leaflet.js"></script>
8 <h1>Please select your location on the map</h1>
12 <input type="button" value="Use below census track" onclick="changeMainDiv()">
14 Census Tract: <div id="mycensustract"></div>
15 <input type=hidden id="censustract" value="">
18 <div id="mapid" style="width: 600px; height: 600px;"></div>
24 var mymap = L.map('mapid').setView(getLatLong('<%$loc%>'), 15);
25 var popup = L.popup();
26 var mainLayer = L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
28 attribution: '© <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
30 var markersLayer = new L.LayerGroup();
31 mymap.addLayer(markersLayer);
33 function onMapClick(e) {
34 markersLayer.clearLayers();
35 var marker = L.marker([e.latlng.lat, e.latlng.lng]);
36 marker.bindPopup("You selected (" + e.latlng.lat + " , " + e.latlng.lng + ")").openPopup();
37 markersLayer.addLayer(marker);
38 getCensusTract(e.latlng.lat, e.latlng.lng);
41 mymap.on('click', onMapClick);
43 function Get(yourUrl){
44 var Httpreq = new XMLHttpRequest(); // a new request
45 Httpreq.open("GET",yourUrl,false);
47 return Httpreq.responseText;
50 function getLatLong(loc) {
51 var url = 'http://nominatim.openstreetmap.org/search?format=json&limit=1&q=' + loc;
52 var json_obj = JSON.parse(Get(url));
53 return [json_obj[0].lat, json_obj[0].lon];
56 function getCensusTract(lat, lon) {
57 var url = 'xmlhttp-censustract.html?lat=' + lat + '&lon=' + lon + '&census_year=<%$census_year%>';
58 var json_obj = JSON.parse(Get(url));
59 var tract = (json_obj.Block.FIPS.substr(0, 11) / 100).toFixed(2);
60 document.getElementById("mycensustract").innerHTML = tract;
63 function changeMainDiv(lat,lng) {
64 window.opener.document.getElementById("newcensustract").innerHTML = document.getElementById("mycensustract").innerHTML;
65 window.opener.document.getElementById("new_tract").value = document.getElementById("mycensustract").innerHTML;
66 window.opener.document.getElementById("setnewtractdiv").style.display = "block";
67 window.opener.document.getElementById("cancelsubmissiontop").style.display = "none";
68 window.opener.document.getElementById("cancelsubmissionbottom").style.display = "block";
78 local $SIG{__DIE__}; #disable Mason error trap
82 my $census_year = $cgi->param('census_year');
83 my $pre = $cgi->param('pre');
84 my $zip_code = $cgi->param('zip_code');
85 my $address = $cgi->param('address');
86 my $loc = $zip_code ? $zip_code : $address;