PC端百度地理围栏、绘制工具以及判断当前坐标是否再围栏中

2023-09-24 26 0

一、导读

围栏:顾明思议就是利用地图的多个经纬度坐标点画出图形;
需求:在地图上画出多个不同的围栏,提交保存到围栏列表(坐标列表),获取用户的经纬度坐标判断是否在围栏中;
圆形围栏坐标示例:circle:100.228204_26.885269_100;
多边形围栏坐标示例:polygon:100.228204_26.885269;100.243726_26.885269;100.242648_26.87586;100.227916_26.876376;
百度地理围栏示例图

二、百度地理围栏绘制页面实现

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<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:550px; 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;}img {max-width: none !important;}</style><script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=DDeab79143f4badeab31428588d27aad"></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>鼠标绘制工具</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="提交所选区域" onclick="allGps()"/><input type="button" value="清除所有区域" onclick="clearAll()"/></div><script type="text/javascript">// 百度地图API功能var map = new BMap.Map('map',{enableMapClick:false});//定义地图中心点// var poi = new BMap.Point(116.392,39.918);//定义地图初始级别(数字越大越精细)// map.centerAndZoom(poi, 16);//定义中心城市map.centerAndZoom("济南",12);//启用滚轮缩放map.enableScrollWheelZoom(); map.enableInertialDragging();map.enableContinuousZoom();// 地图加载完成设置最终城市定位map.addEventListener("tilesloaded", finalCityHandler);function finalCityHandler() {map.removeEventListener("tilesloaded", finalCityHandler);//定义中心城市if ("济南" != "") {map.centerAndZoom("济南",13);}}var local = new BMap.LocalSearch(map, {renderOptions:{map: map}});// 定义一个控件类,即functionfunction ZoomControl(){// 默认停靠位置和偏移量this.defaultAnchor = BMAP_ANCHOR_TOP_LEFT;this.defaultOffset = new BMap.Size(80, 20);}// 通过JavaScript的prototype属性继承于BMap.ControlZoomControl.prototype = new BMap.Control();// 自定义控件必须实现自己的initialize方法,并且将控件的DOM元素返回// 在本方法中创建个div元素作为控件的容器,并将其添加到地图容器中ZoomControl.prototype.initialize = function(map){// 创建一个DOM元素var div = document.createElement("div");var d = document.createElement("input");d.type = "text";d.setAttribute("style","width:120px;height:25px;");var f = document.createElement("input");f.type = "button";f.value = "搜索";div.appendChild(d);div.appendChild(f);// 设置样式// 绑定事件,点击一次放大两级f.onclick = function(e){var val=d.value;if(val){local.search(val);}}// 添加DOM元素到地图中map.getContainer().appendChild(div);// 将DOM元素返回return div;}// 创建控件var myZoomCtrl = new ZoomControl();// 添加到地图当中map.addControl(myZoomCtrl);//     //版权控件var cr = new BMap.CopyrightControl({anchor: BMAP_ANCHOR_TOP_LEFT});   //设置版权控件位置
// 	map.addControl(cr); //添加版权控件
// 	var bs = map.getBounds();   //返回地图可视区域
// 	cr.addCopyright({id: 1, content: "<a href='http://www.vjifen.com/' target='_blank' style='font-size:15px'>技术支持:V积分</a>", bounds: bs});//搜索控件var size = new BMap.Size(10, 20);map.addControl(new BMap.CityListControl({anchor: BMAP_ANCHOR_TOP_LEFT,offset: size,}));//覆盖物列表var overlays = [];//--------------------------右键菜单方法---------------------------//删除动作方法var removeMarker = function(e,ee,marker){map.removeOverlay(marker);//地图删除覆盖物delPoint(overlays,marker);//覆盖物列表删除此覆盖物}//坐标检测方法var checkMarker = function(e,ee,marker){var lon=marker.getPosition().lng;var lat=marker.getPosition().lat;checkPointIn(lon,lat);}//开启多边形编辑var beginEdit = function(e,ee,marker){marker.enableEditing();}//关闭多边形编辑var endEdit = function(e,ee,marker){if(marker.point instanceof Object){var r = marker.getRadius(); if(r>1000*10){$.fn.alert("半径不能超过10千米");return;}}else{var tops=marker.getPath().length;if(tops>30){//多边形边数限制$.fn.alert("多边形最大不能超过30条边!");return;}}marker.disableEditing();}//todo--------添加标注var addLabel = function(e,ee,marker){}// 更改中心城市function changeCenterCity(cityName) {map.centerAndZoom(cityName,13);}//右键菜单function getMenu(rectangle){var markerMenu=new BMap.ContextMenu();markerMenu.addItem(new BMap.MenuItem('删除区域',removeMarker.bind(rectangle)));//为菜单绑定事件markerMenu.addItem(new BMap.MenuItem('开始编辑',beginEdit.bind(rectangle)));//为菜单绑定事件markerMenu.addItem(new BMap.MenuItem('结束编辑',endEdit.bind(rectangle)));//为菜单绑定事件return markerMenu;}//---------------------------覆盖物方法(覆盖物画完后调用)---------------------------//为覆盖物绑定方法var overlaycomplete = function(e){var p = e.drawingMode;//获取覆盖物的属性if(overlays.length==20){$.fn.alert("最多只能添加20个区域!");map.removeOverlay(e.overlay);return;}if(p =='marker'){//是否是点var markerMenu=new BMap.ContextMenu();//生成右键菜单markerMenu.addItem(new BMap.MenuItem('检测此点坐标',checkMarker.bind(e.overlay)));//为菜单绑定事件markerMenu.addItem(new BMap.MenuItem('删除',removeMarker.bind(e.overlay)));//为菜单绑定事件e.overlay.addContextMenu(markerMenu);//覆盖物绑定菜单}else if(p =='circle'){ // 圆var r = e.overlay.getRadius(); if(r>1000*10){$.fn.alert("半径不能超过10千米");map.removeOverlay(e.overlay);return;} else if(r<5){ // 半径小于5米认为图形无效map.removeOverlay(e.overlay);return;}overlays.push(e.overlay);//覆盖物列表添加覆盖物//添加右键菜单e.overlay.addContextMenu(getMenu(e.overlay));//覆盖物绑定菜单} else if (p == 'rectangle') { // 矩形// 如果两点重合则视为无效if (JSON.stringify(e.overlay.getPath()[0]) == JSON.stringify(e.overlay.getPath()[1])) {map.removeOverlay(e.overlay);return;}overlays.push(e.overlay);//覆盖物列表添加覆盖物//添加右键菜单e.overlay.addContextMenu(getMenu(e.overlay));//覆盖物绑定菜单} else { // 多边形if(e.overlay.getPath().length>30){//多边形边数限制$.fn.alert("多边形最大不能超过30条边!");map.removeOverlay(e.overlay);return;} else if (e.overlay.getPath().length<3) {map.removeOverlay(e.overlay);return;}overlays.push(e.overlay);//覆盖物列表添加覆盖物//添加右键菜单e.overlay.addContextMenu(getMenu(e.overlay));//覆盖物绑定菜单}};//图形样式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//显示哪些绘制工具(BMAP_DRAWING_MARKER:点,BMAP_DRAWING_CIRCLE:圆,BMAP_DRAWING_POLYLINE:折线,BMAP_DRAWING_POLYGON:多边形,BMAP_DRAWING_RECTANGLE:矩形)drawingModes:[BMAP_DRAWING_RECTANGLE,BMAP_DRAWING_POLYGON,BMAP_DRAWING_CIRCLE],drawingTypes:[BMAP_DRAWING_RECTANGLE,BMAP_DRAWING_POLYGON,BMAP_DRAWING_CIRCLE]}//,//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);//清除所有覆盖物function clearAll() {for(var i = 0; i < overlays.length; i++){map.removeOverlay(overlays[i]);//循环清除}overlays.length = 0;}//提交方法function allGps(){if(overlays.length==0){// alert("未选择任何区域");return;}var points=[];//区域数组for (var a = 0; a < overlays.length; a++) {//var type=overlays[a].wQ;//var type=Object.getPrototypeOf(overlays[a]).wQ;//if(type=='Circle'){if(overlays[a].point instanceof Object){var str="circle:"+overlays[a].getCenter().lng+"_"+overlays[a].getCenter().lat+"_"+overlays[a].getRadius();}else{var ov=overlays[a].getPath();//单个覆盖物var str="polygon:";for (var t = 0; t < ov.length; t++) {//循环添加各定点的横纵坐标if(t==(ov.length-1)){str+=ov[t].lng+"_"+ov[t].lat;}else{str+=ov[t].lng+"_"+ov[t].lat+";";}}}points.push(str);//将坐标系添加到区域数组}alert(points);// return points;// uploadPoint(points);//上传区域坐标系}//删除单个覆盖物function delPoint(arr, val){for(var i=0; i<arr.length; i++) {if(arr[i] == val) {arr.splice(i, 1);break;}}}//todo----------判断覆盖物是否有嵌套或重叠(如果有,则返回false)function checkGps(){for (var a = 0; a < overlays.length; a++) {var ov=overlays[a].getPath();str="横坐标:"+ov[0].lng+",横坐标:"+ov[2].lng+",纵坐标:"+ov[2].lat+",纵坐标:"+ov[0].lat;for(b = 0; b < overlays.length; b++){var ov1=overlays[b].getPath();}}}//上传区域坐标系function uploadPoint(points){var url_="<%=cpath%>/mapTest/uploadPoint.do?pointString="+points;$.ajax({type: "POST",url: url_,success:function(data){if(data=="success"){alert("提交成功");}	}});}//检测某个点是否在坐标系内function checkPointIn(lon,lat){var url_="<%=cpath%>/mapTest/checkPoint.do?lon="+lon+"&lat="+lat;$.ajax({type: "POST",url: url_,success:function(data){alert(data);}});}//接收后台传过来的区域列表,并画多边形var pointString='${hotAreaCog.coordinate}';if(pointString){//var pointList=eval("(" + pointString + ")");//转换var pointList=pointString.split(",");if(pointList.length>0){//列表不为空for (var a = 0; a < pointList.length; a++) {var points=pointList[a];//单个区域var rectangle;if(points.indexOf('circle')>-1){var circle=points.split(":")[1];var p=circle.split("_");var point=new BMap.Point(p[0], p[1]);rectangle=new BMap.Circle(point,p[2],styleOptions);}else{var point=points.split(":")[1].split(";");//坐标系var markers=[];for (var b = 0; b < point.length; b++) {var gps=point[b].split("_");//单个坐标markers.push(new BMap.Point(gps[0],gps[1]));//生成坐标点}rectangle = new BMap.Polygon(markers, styleOptions);  //创建矩形}//添加右键菜单rectangle.addContextMenu(getMenu(rectangle));	//地图添加矩形map.addOverlay(rectangle);//覆盖物列表添加此覆盖物overlays.push(rectangle);}}}    
</script>
</body>
</html>

三、判断是否再围栏中的方法实现

import java.awt.geom.Point2D;
import java.util.ArrayList;
import java.util.List;
/*** 区域坐标判断工具类*2017年8月24日*/
public class GeoCheckUtil {/*** 坐标是否在坐标系内* @param lon经度* @param lat纬度* @param pointList区域坐标系 格式(可自定义):(123.12_34.334;123.12_34.334)* @return*/public static boolean isPtIn(double baiduLng,double baiduLat,String pointList){Point2D.Double point = new Point2D.Double(baiduLng, baiduLat);//创建点List<Point2D.Double> pts = new ArrayList<Point2D.Double>();//创建多边形String[] points=pointList.split(";");//循环写入多边形for (int i = 0; i < points.length; i++) {String[] po=points[i].split("_");pts.add(new Point2D.Double(Double.valueOf(po[0]), Double.valueOf(po[1])));}//判断是否在多边形内return IsPtInPoly(point,pts);}/*** 判断坐标是否在圆形区域内* @param baiduLng* @param baiduLat* @param pointList* @return*/public static boolean isCircleIn(double baiduLng,double baiduLat,String pointList){String lonC=pointList.split("_")[0];String latC=pointList.split("_")[1];String cd=pointList.split("_")[2];double cdd=Double.valueOf(cd);//判断坐标到圆点的距离double length=GeoHashUtil.GetDistance(baiduLng, baiduLat, Double.valueOf(lonC), Double.valueOf(latC));if(length<=cdd){return true;}return false;}/*** 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*/private 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trueint 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 verticesPoint2D.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 rayreturn boundOrVertex;}if(p1.y == p2.y){//ray is vertical                        if(p1.y == p.y){//overlies on a vertical rayreturn 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 rayreturn 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;}}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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作者:hanshimeng
出处:https://blog.csdn.net/hanshimeng

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