javascript - Heatmap not generating as expected -
at present have #759 of lat long value in database. have data @ run time database , create heatmap it. when execute code getting following output
my code is
<!doctype html> <html> <head> <meta charset="utf-8"> <title>heatmaps</title> <style> html, body, #map-canvas { height: 100%; margin: 0px; padding: 0px } #panel { position: absolute; top: 5px; left: 50%; margin-left: -180px; z-index: 5; background-color: #fff; padding: 5px; border: 1px solid #999; } </style> <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&signed_in=true&libraries=visualization"></script> <script src="https://code.jquery.com/jquery-1.11.3.min.js"></script> <script type="text/javascript"> // adding 500 data points var map, pointarray, heatmap; var latlng = jquery.parsejson('{"22.396428,114.109497": "1","37.368595,-121.92018": "1","37.369366,-121.92077": "1","37.626827,-79.58193": "1","37.61383,-79.59316": "1","37.61173,-79.59856": "1","37.61153,-79.601425": "1","37.6039,-79.62361": "1","37.610302,-79.61913": "1","37.5623,-79.68936": "1","37.51617,-79.67629": "1","37.147198,-80.342834": "1","37.146343,-80.34469": "1","12.996512,77.542616": 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"1","18.6233113,73.82959509": "1","37.2001179,-121.8377322": "1","14.6577046,-17.39784838": "1","18.5668687,73.80705834": "1","37.2059413,-121.8473756": "1","37.201664,-121.844086": "1","50.8726847,-3.287866074": "1","18.5252139,73.87670475": "1","18.9511017,72.81657542": "1","28.478056,-81.50611": "1","7.76548512,80.1661539": "1","6.88860942,79.8585522": "1","37.368683,-121.9201": "1","37.38952,-122.074135": "1","37.390427,-122.075165": "1","37.36876,-121.92016": "1","7.84697579,80.20515646": "1","13.0079671,77.55948676": "1","6.91782695,79.86301619": "1","19.0080561,72.83544961": "1","19.1038034,72.89614366": "1","19.1152771,72.8951763": "1","19.0162238,72.82775443": "1","37.368614,-121.920044": "1","19.0162055,72.83052145": "1"}'); var taxidata = []; var locwgt = {loc:[]}; var value = "1"; var latlng3 = ""; var jsondata = {}; var sptlatlng; $.each(latlng, function(idx, value) { sptlatlng = idx.split(","); jsondata['location']=new google.maps.latlng(sptlatlng[0],sptlatlng[1]); jsondata['weight']=value; locwgt.loc.push(jsondata); }); taxidata = [locwgt['loc']]; function initialize() { var mapoptions = { zoom: 6, center: new google.maps.latlng(sptlatlng[0],sptlatlng[1]), maptypeid: google.maps.maptypeid.hybrid }; map = new google.maps.map(document.getelementbyid('map-canvas'), mapoptions); var pointarray = new google.maps.mvcarray(taxidata[0]); heatmap = new google.maps.visualization.heatmaplayer({ data: pointarray, radius: 30 }); heatmap.setmap(map); } google.maps.event.adddomlistener(window, 'load', initialize); </script> </head> <body> <div id="panel"> <button onclick="toggleheatmap()">toggle heatmap</button> <button onclick="changegradient()">change gradient</button> <button onclick="changeradius()">change radius</button> <button onclick="changeopacity()">change opacity</button> </div> <!--<div id="map-canvas"></div>//--> <div id="map-canvas" style="position:absolute; left:100px; top:60px; width:80%; height:80%"></div> </body> </html> but when create heatmap data using {location: new google.maps.latlng(19.0162055,72.83052145), weight: 1} output proper
what wrong code. getting error set of data rest code working fine.
update 1
after adding parsefloat while creating latlong , adding parsefloat while adding weight getting heatmap in circular pattern on india. see below image.
but rest of data missing in heatmap. why so?
this works me. change loop:
$.each(latlng, function(idx, value) { sptlatlng = idx.split(","); jsondata['location']=new google.maps.latlng(sptlatlng[0],sptlatlng[1]); jsondata['weight']=value; locwgt.loc.push(jsondata); }); to use both parsefloat around data, , anonymous variable instead of 1 keep updating:
$.each(latlng, function(idx, value) { sptlatlng = idx.split(","); locwgt.loc.push({ location: new google.maps.latlng(parsefloat(sptlatlng[0]), parsefloat(sptlatlng[1])), weight: parsefloat(value) }); });
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