我尝试了很多,但无法弄清楚问题。我想在特定的lat,lng周围绘制一个多边形。多边形将由特定半径的13个坐标组成。
代码
function showAddress(address, miles) {
var geocoder = new google.maps.Geocoder();
geocoder.geocode({
address : address
}, function(results, status) {
if(status == google.maps.GeocoderStatus.OK) {
//searchLocationsNear(results[0].geometry.location);
var cordinate = results[0].geometry.location;
//alert(cordinate);
var mapOptions = {
center : cordinate,
zoom : 8,
mapTypeId : google.maps.MapTypeId.ROADMAP,
overviewMapControl : true,
overviewMapControlOptions : {
opened : true,
position : google.maps.ControlPosition.BOTTOM_LEFT
}
};
//
//var address = document.getElementById("address").value;
var radius = 1;
var latitude = 23.1793013;
var longitude = 75.78490970000007;
//Degrees to radians
var d2r = Math.PI / 180;
// Radians to degrees
var r2d = 180 / Math.PI;
// Earth radius is 3,963 miles
var cLat = (radius / 3963) * r2d;
var cLng = cLat / Math.cos(latitude * d2r);
//Store points in array
var points = [];
alert("declare array");
var bounds = new google.maps.LatLngBounds();
// Calculate the points
// Work around 360 points on circle
for(var i = 0; i < 13; i++) {
var theta = Math.PI * (i / 180);
// Calculate next X point
circleY = longitude + (cLng * Math.cos(theta));
//console.log("CircleY:"+circleY);
// Calculate next Y point
circleX = latitude + (cLat * Math.sin(theta));
//console.log("circleX:"+circleX);
// Add point to array
var aPoint = new google.maps.LatLng(circleX, circleY);
points.push(aPoint);
bounds.extend(aPoint);
}
points.push(points[0]);
//console.log(points);
//to complete circle
var colors = ["#CD0000", "#2E6444", "#003F87"];
var Polyline_Path = new google.maps.Polyline({
path : points,
strokeColor : colors[0],
// color of the outline of the polygon
strokeOpacity : 1,
// between 0.0 and 1.0
strokeWeight : 1,
// The stroke width in pixels
fillColor : colors[1],
fillOpacity : 0
});
var map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);
Polyline_Path.setMap(map);
} else {
alert(address + ' not found');
}
});
}
答案 0 :(得分:3)
用
替换i&lt; 13; i ++I&LT; 360; I + =十三分之三百六十零
这将起作用
感谢
编辑:不需要最后一点,因为gmap会自动关闭它
答案 1 :(得分:1)
我认为cLng应该更改为:
var cLng = cLat * Math.cos(latitude * d2r);
(要得到一个完美的圆)