Question

目前我在数据库中拥有lat长值的＃759。我必须在运行时从数据库中获取这些数据并从中创建热图。当我执行此代码时，我得到以下输出

我的代码是

<!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": "1","37.3931158,-121.9105196": "1","19.1199982,72.88999557": "1","15.526964,73.832266": "1","19.068611,73.000275": "1","19.068611,72.99917": "1","28.534723,77.179348": "1","28.543463,77.14846": "1","28.6139391,77.2090212": "1","37.3729489,-121.92731119999999": "1","37.368694,-121.92026": "1","37.368057,-121.91978": "1","40.001724,-75.26075": "1","37.201504,-121.844444": "1","18.5204303,73.8567437": "1","28.581147,77.37131": "1","34.162033,-118.46924": "1","34.17249,-118.46296": "1","28.599445,77.31944": "1","34.086544,-118.376837": "1","37.369095,-121.92056": "1","28.6,77.31778": 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"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>

但是当我使用{location: new google.maps.LatLng(19.0162055,72.83052145), weight: 1}创建热图数据时，输出是正确的

我的代码出了什么问题。我收到这组数据的错误只是为了休息所有代码都正常工作。

Update 1

在创建latlong时添加parseFloat并在添加重量时添加parseFloat我现在在印度上以圆形模式获取热图。见下图。

但热图中缺少所有数据的其余部分。为什么会这样？

Answer 1

这对我有用。改变你的循环：

$.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)
  });
});

在所有数据周围使用parseFloat，也使用匿名变量而不是您不断更新的变量：

GetComponent.<Rigidbody>()

热图不会按预期生成

1 个答案: