openlayers3 ol3热力图 json
最近分配一个 gis地图的 任务，要我弄个热力图巨坑啊，当时就是没啥想，后来想想。
后面弄完 确实发现简单，为了方便广大网友 也方便自己写在博客
<body>
<div class=”container-fluid”>
<div class=”row-fluid”>
<div class=”span12″>
<div id=”map” class=”map”></div>
</div>
<div class=”span4″>
<form>
<label>radius size</label>
<input id=”radius” type=”range” min=”1″ max=”50″ step=”1″ value=”5″/>
<label>blur size</label>
<input id=”blur” type=”range” min=”1″ max=”50″ step=”1″ value=”15″/>
</form>
</div>
</div>
</div>
<script>
//底图
var raster = new ol.layer.Tile({
source: new ol.source.Stamen({
layer: ‘toner’
})
});
var map = new ol.Map({
layers: [raster],
target: ‘map’,
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
var blur = document.getElementById(‘blur’);
var radius = document.getElementById(‘radius’);
//矢量图层 获取gejson数据
var vectorSource = new ol.source.Vector({
features: (new ol.format.GeoJSON()).readFeatures(heatData,{
dataProjection : ‘EPSG:4326’,
featureProjection : ‘EPSG:3857’
})
});
// Heatmap热力图
var vector = new ol.layer.Heatmap({
source: vectorSource,
blur: parseInt(blur.value, 10),
radius: parseInt(radius.value, 10),
});
map.addLayer(vector);
</script>
效果图
数据量太大目前丢在资源里 地址：
http://download.csdn.net/detail/u012374381/9885617
转载自：https://blog.csdn.net/u012374381/article/details/74012187
