index.html
<!DOCTYPE html>
<html>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>图层 - VectorLayer: 根据属性条件筛选图形</title>
<style type="text/css">
html,body{margin:0px;height:100%;width:100%}
.container{width:100%;height:100%}
.pane{background:#34495e;line-height:28px;color:#fff;z-index:10;position:absolute;top:20px;right:20px}
.pane a{display:block;color:#fff;text-align:left;padding:0 10px;min-width:28px;min-height:28px;float:left}
</style>
<link rel="stylesheet" href="https://unpkg.com/maptalks/dist/maptalks.css">
<script type="text/javascript" src="https://unpkg.com/maptalks/dist/maptalks.min.js"></script>
<body>
<div id="map" class="container"></div>
<div class="pane"><a href="javascript:filter();">Select >= 200</a></div>
<script>
var map = new maptalks.Map('map', {
center: [-0.113049,51.498568],
zoom: 14,
baseLayer: new maptalks.TileLayer('base', {
urlTemplate: 'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
subdomains: ['a','b','c','d'],
attribution: '© <a href="http://osm.org">OpenStreetMap</a> contributors, © <a href="https://carto.com/">CARTO</a>'
}),
layers : [
new maptalks.VectorLayer('v')
]
});
var layer = map.getLayer('v');
// select features and update symbol
function filter() {
layer.filter(['>=', 'count', 200])
.forEach(function (feature) {
feature.updateSymbol([
{
'polygonFill': 'rgb(216,115,149)'
}
]);
});
}
//prepare data
for (var i = 0; i < 3; i++) {
new maptalks.Polygon([
[-0.123049 + 0.02 * i, 51.503568],
[-0.136049 + 0.02 * i, 51.503568],
[-0.136049 + 0.02 * i, 51.488568],
[-0.123049 + 0.02 * i, 51.488568]
], {
'properties': {
'count': (i + 1) * 100
},
'symbol': [
{
'polygonFill': '#747474',
'polygonOpacity': 0.5,
'lineColor': '#000',
'lineWidth': 2
},
{
'textName' : '{count}',
'textSize' : 40,
'textFill' : '#fff'
}
]
}).addTo(layer);
}
</script>
</body>
</html>