OpenLayer4——面（多边形）

 单独介绍多边形，主要是因为存在多边形组合使用的情况。

DOCTYPE html>
<html lang="en">
<head>
   <meta charset="UTF-8">
   <title>Titletitle>
   
   <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL">script>
   <link href="ol/ol.css" rel="stylesheet" type="text/css"/>
   <script type="text/javascript" src="ol/ol.js" charset="utf-8">script>
head>
<body>
<div id="map" style="width: 100%;height: 100%">div>
<script>
   var layerVector = new ol.layer.Vector({
      source: new ol.source.Vector()
   });

   var map = new ol.Map({
      layers:[
         new ol.layer.Tile({
            source:new ol.source.OSM(),
         })
         ,layerVector
      ],
      target:'map',
      view:new ol.View({
         center: [12950000, 4860000],
         zoom:7
      })
   });

   var iconStyle = new ol.style.Style({
      stroke: new ol.style.Stroke({
         color: '#666666',
         width: 1
      })
   });

   var pointFeature2 = new ol.Feature({
      geometry: new ol.geom.Polygon([[[12950000, 4860000],[12950000, 4760000],[12850000, 4760000],[12950000, 4860000]]])
   });
   pointFeature2.setStyle(iconStyle);

   layerVector.getSource().addFeature(pointFeature2);
script>
body>
html>

 异或运算

//异或运算
var pointFeature = new ol.Feature({
  geometry: new ol.geom.MultiPolygon([
    [
      [
        [12950000, 4860000],[12950000, 4760000],[12850000, 4760000],[12950000, 4860000]
      ]
     , [
        [12900000, 4860000],[12900000, 4760000],[12850000, 4760000],[12900000, 4860000]
      ]
    ]
  ])
});

 与运算 

//与运算
var pointFeature = new ol.Feature({
  geometry: new ol.geom.MultiPolygon([
    [
      [
        [12950000, 4860000],[12950000, 4760000],[12850000, 4760000],[12950000, 4860000]
      ]
    ]
   ,[
       [
         [12900000, 4860000],[12900000, 4760000],[12850000, 4760000],[12900000, 4860000]
       ]
    ]
  ])
});

OpenLayer4入门

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