判斷地圖上的點是否在圓形,多邊形,區域內

時間 2019-11-06

標籤判斷地圖是否圓形多邊形區域简体版

原文原文鏈接

GeoUtils.js

這是官方提供的一個js
能夠從我gihub下載: https://github.com/liaotuo/BMapAPI/js
js行數過多就不展現了javascript

效果圖

源碼

github https://github.com/liaotuo/BMapAPI
Tips
- 要注意Point和Circle 都必須是:BMap.Point和BMap.Bounds對象
- 此案例只展現了多邊形和圓形 GeoUtils.js還提供了矩形等其餘判斷API
判斷在圓形內

<!-- 
    liaotuo 
    2016.09.25 
    判斷點是否在圓形區域內(用於電子圍欄)
-->
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微軟雅黑";}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=百度地圖API開發者密鑰AK"></script>
<script type="text/javascript" src="js/GeoUtils.js"></script>


<title>圓形區域判斷</title>
</head>
<body>
<div id="allmap"></div>
</body>
</html>
<script type="text/javascript">
//建立地圖
var map = new BMap.Map("allmap");  
//建立一個圓
var circle = new BMap.Circle(new BMap.Point(112.595384,26.904631),1000,{fillColor:"blue", strokeWeight: 1 ,fillOpacity: 0.3, strokeOpacity: 0.3});

 var point2s = [  
      new BMap.Point(112.586149,26.913201),  
      new BMap.Point(112.58464,26.909432),  
      new BMap.Point(112.585143,26.899219),  
      new BMap.Point(112.600953,26.898832),  
      new BMap.Point(112.607421,26.900572),  
      new BMap.Point(112.606631,26.904825),  
      new BMap.Point(112.606523,26.909142),  
      new BMap.Point(112.59772,26.909399),
      ];
//建立標註點並添加到地圖中
function addMarker(points) {
    //循環創建標註點
    for(var i=0, pointsLen = points.length; i<pointsLen; i++) {
        var marker = new BMap.Marker(points[i]); //將點轉化成標註點
        map.addOverlay(marker);  //將標註點添加到地圖上
        //添加監聽事件
        (function() {
            var thePoint = points[i];
            marker.addEventListener("click",
                function() {
                showInfo(this,thePoint);
            });
         })();  
    }
}

function showInfo(thisMarker,point) {

    //判斷點是否在
    if(BMapLib.GeoUtils.isPointInCircle(point,circle)){
      var infoWindow = new BMap.InfoWindow("在圓形區域內");
      thisMarker.openInfoWindow(infoWindow); //圖片加載完後重繪infoWindow
  }else
  {
     var infoWindow = new BMap.InfoWindow("不在圓形區域內");
      thisMarker.openInfoWindow(infoWindow); //圖片加載完後重繪infoWindow
  }
}


function initialize() {  
    alert("點擊標註點能夠顯示是否在區域內");
  // 百度地圖API功能  
  map.addControl(new BMap.NavigationControl());               // 添加平移縮放控件  
  map.addControl(new BMap.ScaleControl());                    // 添加比例尺控件  
  map.addControl(new BMap.OverviewMapControl());              //添加縮略地圖控件  
  map.enableScrollWheelZoom();                            //啓用滾輪放大縮小  
  map.addControl(new BMap.MapTypeControl());          //添加地圖類型控件  

    var point = new BMap.Point(112.595384,26.904631);    // 建立點座標  
        map.centerAndZoom(point,15);                      // 初始化地圖,設置中心點座標和地圖級別。  
        addMarker(point2s); 
  map.addOverlay(circle);
}  

initialize();

</script>

判斷在多邊形內

<!-- 
    liaotuo 
    2016.09.11 
    判斷點在多邊形內
-->
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微軟雅黑";}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=百度地圖API開發者密鑰AK"></script>
<script type="text/javascript" src="js/GeoUtils.js"></script>


<title>圓形區域判斷</title>
</head>
<body>
<div id="allmap"></div>
</body>
</html>
<script type="text/javascript">
//建立地圖
var map = new BMap.Map("allmap");  
//建立一個多邊形

//建立多邊形  
var polygon2 = new BMap.Polygon([  
      new BMap.Point(112.579325,26.915291),  
      new BMap.Point(112.584967,26.899086),  
      new BMap.Point(112.608287,26.898023),  
      new BMap.Point(112.605035,26.90764),  
      new BMap.Point(112.602825,26.914356),  
      new BMap.Point(112.588254,26.909862),  
      ], {strokeColor:"#f50704",fillColor:"#cfcfcf", strokeWeight:5, strokeOpacity:0,fillOpacity:0,});  

 var point2s = [  
      new BMap.Point(112.586149,26.913201),  
      new BMap.Point(112.58464,26.909432),  
      new BMap.Point(112.585143,26.899219),  
      new BMap.Point(112.600953,26.898832),  
      new BMap.Point(112.607421,26.900572),  
      new BMap.Point(112.606631,26.904825),  
      new BMap.Point(112.606523,26.909142),  
      new BMap.Point(112.59772,26.909399),
      ];
//建立標註點並添加到地圖中
function addMarker(points) {
    //循環創建標註點
    for(var i=0, pointsLen = points.length; i<pointsLen; i++) {
        var marker = new BMap.Marker(points[i]); //將點轉化成標註點
        map.addOverlay(marker);  //將標註點添加到地圖上
        //添加監聽事件
        (function() {
            var thePoint = points[i];
            marker.addEventListener("click",
                function() {
                showInfo(this,thePoint);
            });
         })();  
    }
}

function showInfo(thisMarker,point) {

    //判斷點是否在
    if(BMapLib.GeoUtils.isPointInPolygon(point,polygon2)){
      var infoWindow = new BMap.InfoWindow("在區域內");
      thisMarker.openInfoWindow(infoWindow); //圖片加載完後重繪infoWindow
  }else
  {
     var infoWindow = new BMap.InfoWindow("不在區域內");
      thisMarker.openInfoWindow(infoWindow); //圖片加載完後重繪infoWindow
  }
}


function initialize() {  
    alert("點擊標註點能夠顯示是否在區域內");
  // 百度地圖API功能  
  map.addControl(new BMap.NavigationControl());               // 添加平移縮放控件  
  map.addControl(new BMap.ScaleControl());                    // 添加比例尺控件  
  map.addControl(new BMap.OverviewMapControl());              //添加縮略地圖控件  
  map.enableScrollWheelZoom();                            //啓用滾輪放大縮小  
  map.addControl(new BMap.MapTypeControl());          //添加地圖類型控件  

    var point = new BMap.Point(112.595384,26.904631);    // 建立點座標  
        map.centerAndZoom(point,15);                      // 初始化地圖,設置中心點座標和地圖級別。  
        addMarker(point2s); 
  map.addOverlay(polygon2);
}  

initialize();

</script>