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注意：
1.百度地图ak换成自己在百度地图官网申请
2.建议使用firefox浏览器，google被墙无法调用gps
3.发布到服务器必须使用https，对于localhost和本地测试不用
4.电脑开启位置服务，手机打开gps定位
5.百度地图坐标和gps坐标不一致，要在百度地图正确显示位置必须把gps坐标转为百度坐标
6.多边形范围绘制页面：https://www.idaobin.com/archives/2267.html
<!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: "微软雅黑";
}
</style>
<script type="text/javascript"
src="https://api.map.baidu.com/api?v=2.0&ak=自己申请"></script>
<script type="text/javascript" src="GeoUtils.js"></script>
<title>多边形区域判断</title>
</head>
<body>
<div>可以把地图缩小，看一下多边形范围画在哪</div>
<input type="button" name="" id="daka" value="判定">
<div id="allmap"></div>
</body>
</html>
<script type="text/javascript">
getMyLocation();
function getMyLocation() {
if (navigator.geolocation) {
//判断是否有这个对象
navigator.geolocation.getCurrentPosition(function (pos) {
var bd = GpsToBaiduPoint(pos.coords);
var list = new Array();
list.push(bd);
initialize(list);
var marker = new BMap.Marker(list[0]); //将点转化成标注点
map.addOverlay(marker); //将标注点添加到地图上
var infoWindow = new BMap.InfoWindow("当前位置");
marker.openInfoWindow(infoWindow); //图片加载完后重绘infoWindow
})
} else {
console.log("当前系统不支持GPS API")
}
}
//创建地图
var map = new BMap.Map("allmap");
//创建多边形
var polygonpoint = [{ "lng": 102.658456, "lat": 25.353849 }, { "lng": 103.435741, "lat": 25.27023 }, { "lng": 103.164381, "lat": 24.958241 }, { "lng": 102.587166, "lat": 24.993878 }];
var range = [];
for (var i = 0; i < polygonpoint.length; i++) {
range.push(new BMap.Point(polygonpoint[i].lng, polygonpoint[i].lat))
}
var polygon = new BMap.Polygon(range, { strokeColor: "#f50704", fillColor: "#cfcfcf", strokeWeight: 3, strokeOpacity: 0, fillOpacity: 0, });
function showInfo(thisMarker, point) {
//判断点是否在
if (BMapLib.GeoUtils.isPointInPolygon(point, polygon)) {
alert("在区域内");
} else {
alert("不在区域内");
}
}
function initialize(bdpoint) {
// 百度地图API功能
map.addControl(new BMap.NavigationControl()); // 添加平移缩放控件
map.addControl(new BMap.ScaleControl()); // 添加比例尺控件
map.addControl(new BMap.OverviewMapControl()); //添加缩略地图控件
map.enableScrollWheelZoom(); //启用滚轮放大缩小
map.addControl(new BMap.MapTypeControl()); //添加地图类型控件
var point = new BMap.Point(bdpoint[0].lng, bdpoint[0].lat); // 创建点坐标
map.centerAndZoom(point, 10); // 初始化地图,设置中心点坐标和地图级别。
map.addOverlay(polygon);
//点击事件
var btn = document.getElementById("daka");
btn.addEventListener("click",
function () {
showInfo(this, bdpoint[0]);
});
}
function GpsToBaiduPoint(point) {
var _t = wgs2bd(point.latitude, point.longitude);
var _BPoint = new BMap.Point(_t[1], _t[0]);
return _BPoint;
}
var pi = 3.14159265358979324;
var a = 6378245.0;
var ee = 0.00669342162296594323;
var x_pi = 3.14159265358979324 * 3000.0 / 180.0;
//世界大地坐标转为百度坐标
function wgs2bd(lat, lon) {
var wgs2gcjR = wgs2gcj(lat, lon);
var gcj2bdR = gcj2bd(wgs2gcjR[0], wgs2gcjR[1]);
return gcj2bdR;
}
function gcj2bd(lat, lon) {
var x = lon,
y = lat;
var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
var bd_lon = z * Math.cos(theta) + 0.0065;
var bd_lat = z * Math.sin(theta) + 0.006;
var result = [];
result.push(bd_lat);
result.push(bd_lon);
return result;
}
function bd2gcj(lat, lon) {
var x = lon - 0.0065,
y = lat - 0.006;
var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
var gg_lon = z * Math.cos(theta);
var gg_lat = z * Math.sin(theta);
var result = [];
result.push(gg_lat);
result.push(gg_lon);
return result;
}
function wgs2gcj(lat, lon) {
var dLat = transformLat(lon - 105.0, lat - 35.0);
var dLon = transformLon(lon - 105.0, lat - 35.0);
var radLat = lat / 180.0 * pi;
var magic = Math.sin(radLat);
magic = 1 - ee * magic * magic;
var sqrtMagic = Math.sqrt(magic);
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
var mgLat = lat + dLat;
var mgLon = lon + dLon;
var result = [];
result.push(mgLat);
result.push(mgLon);
return result;
}
function transformLat(lat, lon) {
var ret = -100.0 + 2.0 * lat + 3.0 * lon + 0.2 * lon * lon + 0.1 * lat * lon + 0.2 * Math.sqrt(Math.abs(lat));
ret += (20.0 * Math.sin(6.0 * lat * pi) + 20.0 * Math.sin(2.0 * lat * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(lon * pi) + 40.0 * Math.sin(lon / 3.0 * pi)) * 2.0 / 3.0;
ret += (160.0 * Math.sin(lon / 12.0 * pi) + 320 * Math.sin(lon * pi / 30.0)) * 2.0 / 3.0;
return ret;
}
function transformLon(lat, lon) {
var ret = 300.0 + lat + 2.0 * lon + 0.1 * lat * lat + 0.1 * lat * lon + 0.1 * Math.sqrt(Math.abs(lat));
ret += (20.0 * Math.sin(6.0 * lat * pi) + 20.0 * Math.sin(2.0 * lat * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(lat * pi) + 40.0 * Math.sin(lat / 3.0 * pi)) * 2.0 / 3.0;
ret += (150.0 * Math.sin(lat / 12.0 * pi) + 300.0 * Math.sin(lat / 30.0 * pi)) * 2.0 / 3.0;
return ret;
}
</script>
原文链接：https://www.idaobin.com/archives/2275.html
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