百度地图画多边形代码

来源：互联网发布：敦煌博物馆淘宝编辑：程序博客网时间：2024/06/02 07:44

<!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{width: 100%;height: 100%;margin:0;font-family:"微软雅黑";}      #allmap {width: 100%; height:500px; overflow: hidden;}      #result {width:100%;font-size:12px;}      dl,dt,dd,ul,li{          margin:0;          padding:0;          list-style:none;      }      p{font-size:12px;}      dt{          font-size:14px;          font-family:"微软雅黑";          font-weight:bold;          border-bottom:1px dotted #000;          padding:5px 0 5px 5px;          margin:5px 0;      }      dd{          padding:5px 0 0 5px;      }      li{          line-height:28px;      }      </style>       <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=F0i6SrLmHquLVNLCqpExxPrj8mWVdFwx"></script>      <!--加载鼠标绘制工具-->      <script type="text/javascript" src="http://api.map.baidu.com/library/DrawingManager/1.4/src/DrawingManager_min.js"></script>      <link rel="stylesheet" href="http://api.map.baidu.com/library/DrawingManager/1.4/src/DrawingManager_min.css" />      <!--加载检索信息窗口-->      <script type="text/javascript" src="http://api.map.baidu.com/library/SearchInfoWindow/1.4/src/SearchInfoWindow_min.js"></script>      <link rel="stylesheet" href="http://api.map.baidu.com/library/SearchInfoWindow/1.4/src/SearchInfoWindow_min.css" />      <title>百度地图API功能演示</title>  </head>  <body>      <div id="allmap" style="overflow:hidden;zoom:1;position:relative;">             <div id="map" style="height:100%;-webkit-transition: all 0.5s ease-in-out;transition: all 0.5s ease-in-out;">         </div>      </div>      <div id="result">          <input type="button" value="获取绘制的覆盖物个数" onclick="alert(overlays.length)"/>          <input type="button" value="清除所有覆盖物" onclick="clearAll()"/>          <input type="button"  value="获取多边形的顶点" onclick="getPoint()"/><br/>          <input type="button"  value="开启线、面编辑功能" onclick="Editing('enable')"/>          <input type="button"  value="关闭线、面编辑功能" onclick="Editing('disable')"/>          <input type="button"  value="显示原有多边形" onclick="showPolygon(this)" /><br/>                    <input type="button"  value="画多边形" onclick="draw(BMAP_DRAWING_POLYGON)" />           <input type="button"  value="画矩形" onclick="draw(BMAP_DRAWING_RECTANGLE)" />            <input type="button"  value="画线" onclick="draw(BMAP_DRAWING_POLYLINE)" />             <!-- <input type="button"  value="画点" onclick="draw(BMAP_DRAWING_MARKER)" />-->            <span>右键获取任意点的经纬度</span>      </div>      <div id="resultShape"></div>       <div id="shape">坐标为</div>          <script type="text/javascript">      function $(id){      return document.getElementById(id);  }        // 百度地图API功能      var map = new BMap.Map('map');      var poi = new BMap.Point(113.948913,22.530844);      map.centerAndZoom(poi, 16);      map.enableScrollWheelZoom();        var overlays = [];      var overlaycomplete = function(e){          overlays.push(e.overlay);       };      var styleOptions = {          strokeColor:"red",    //边线颜色。          fillColor:"red",      //填充颜色。当参数为空时，圆形将没有填充效果。          strokeWeight: 3,       //边线的宽度，以像素为单位。          strokeOpacity: 0.8,    //边线透明度，取值范围0 - 1。          fillOpacity: 0.6,      //填充的透明度，取值范围0 - 1。          strokeStyle: 'solid' //边线的样式，solid或dashed。      }            //实例化鼠标绘制工具      var drawingManager = new BMapLib.DrawingManager(map, {          isOpen: false, //是否开启绘制模式          //enableDrawingTool: true, //是否显示工具栏          drawingToolOptions: {              anchor: BMAP_ANCHOR_TOP_RIGHT, //位置              offset: new BMap.Size(5, 5), //偏离值          },          circleOptions: styleOptions, //圆的样式          polylineOptions: styleOptions, //线的样式          polygonOptions: styleOptions, //多边形的样式          rectangleOptions: styleOptions //矩形的样式      });               //添加鼠标绘制工具监听事件，用于获取绘制结果      drawingManager.addEventListener('overlaycomplete', overlaycomplete);            map.addEventListener("rightclick",function(e){          if(confirm(e.point.lng + "," + e.point.lat)){              $("shape").innerHTML=$("shape").innerHTML+" <br/>("+e.point.lng+","+e.point.lat+")";              }          });      function draw(type){          drawingManager.open();           drawingManager.setDrawingMode(type);      }                   function clearAll() {          for(var i = 0; i < overlays.length; i++){              map.removeOverlay(overlays[i]);          }          overlays.length = 0         }      function getPoint(){          $("resultShape").innerHTML='';          for(var i = 0; i < overlays.length; i++){              var overlay=overlays[i].getPath();              $("resultShape").innerHTML=$("resultShape").innerHTML+overlay.length+'边形:<br/>';              for(var j = 0; j < overlay.length; j++){                  var grid =overlay[j];                  $("resultShape").innerHTML=$("resultShape").innerHTML+(j+1)+"个点:("+grid.lng+","+grid.lat+");<br/>";              }          }      }      function Editing(state){          for(var i = 0; i < overlays.length; i++){              state=='enable'?overlays[i].enableEditing():overlays[i].disableEditing();          }      }            function  showPolygon(btn){        var polygon = new BMap.Polygon([            new BMap.Point(113.941853,22.530777),            new BMap.Point(113.940487,22.527789),            new BMap.Point(113.94788,22.527597),            new BMap.Point(113.947925,22.530618)        ], styleOptions);  //创建多边形        map.addOverlay(polygon);   //增加多边形        // overlays.push(polygon); //是否把该图像加入到编辑和删除行列         btn.setAttribute('disabled','false');         showText();       }              function showText(){          var opts = {          position : new BMap.Point(113.941853,22.530777),    // 指定文本标注所在的地理位置          offset   : new BMap.Size(30, 30)    //设置文本偏移量         }       var label = new BMap.Label("不可编辑", opts);  // 创建文本标注对象          label.setStyle({          color : "black",           fontSize : "16px",          fillColor:"red",      //填充颜色。当参数为空时，圆形将没有填充效果。          });        map.addOverlay(label);         }  </script>  </body>  </html>

java判断点是否在多边形中

/** * 判断点是否在多边形内 * @param point 检测点 * @param pts   多边形的顶点 * @return      点在多边形内返回true,否则返回false */public static boolean IsPtInPoly(Point2D.Double point, List<Point2D.Double> pts){        int N = pts.size();    boolean boundOrVertex = true; //如果点位于多边形的顶点或边上，也算做点在多边形内，直接返回true    int intersectCount = 0;//cross points count of x     double precision = 2e-10; //浮点类型计算时候与0比较时候的容差    Point2D.Double p1, p2;//neighbour bound vertices    Point2D.Double p = point; //当前点        p1 = pts.get(0);//left vertex            for(int i = 1; i <= N; ++i){//check all rays                    if(p.equals(p1)){            return boundOrVertex;//p is an vertex        }                p2 = pts.get(i % N);//right vertex                    if(p.x < Math.min(p1.x, p2.x) || p.x > Math.max(p1.x, p2.x)){//ray is outside of our interests                            p1 = p2;             continue;//next ray left point        }                if(p.x > Math.min(p1.x, p2.x) && p.x < Math.max(p1.x, p2.x)){//ray is crossing over by the algorithm (common part of)            if(p.y <= Math.max(p1.y, p2.y)){//x is before of ray                                    if(p1.x == p2.x && p.y >= Math.min(p1.y, p2.y)){//overlies on a horizontal ray                    return boundOrVertex;                }                                if(p1.y == p2.y){//ray is vertical                                            if(p1.y == p.y){//overlies on a vertical ray                        return boundOrVertex;                    }else{//before ray                        ++intersectCount;                    }                 }else{//cross point on the left side                                            double xinters = (p.x - p1.x) * (p2.y - p1.y) / (p2.x - p1.x) + p1.y;//cross point of y                                            if(Math.abs(p.y - xinters) < precision){//overlies on a ray                        return boundOrVertex;                    }                                        if(p.y < xinters){//before ray                        ++intersectCount;                    }                 }            }        }else{//special case when ray is crossing through the vertex                            if(p.x == p2.x && p.y <= p2.y){//p crossing over p2                                    Point2D.Double p3 = pts.get((i+1) % N); //next vertex                                    if(p.x >= Math.min(p1.x, p3.x) && p.x <= Math.max(p1.x, p3.x)){//p.x lies between p1.x & p3.x                    ++intersectCount;                }else{                    intersectCount += 2;                }            }        }                    p1 = p2;//next ray left point    }        if(intersectCount % 2 == 0){//偶数在多边形外        return false;    } else { //奇数在多边形内        return true;    }    }

java测试

// 测试一个点是否在多边形内public static void main(String[] args) {        Point2D.Double point = new Point2D.Double(116.404072, 39.916605);        List<Point2D.Double> pts = new ArrayList<Point2D.Double>();    pts.add(new Point2D.Double(116.395, 39.910));    pts.add(new Point2D.Double(116.394, 39.914));    pts.add(new Point2D.Double(116.403, 39.920));    pts.add(new Point2D.Double(116.402, 39.914));    pts.add(new Point2D.Double(116.410, 39.913));        if(IsPtInPoly(point, pts)){        System.out.println("点在多边形内");    }else{        System.out.println("点在多边形外");    }}

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