【发布时间】:2015-03-19 08:44:47
【问题描述】:
我在其中检索该位置可用的纬度、经度和数量值的网络应用程序。我能够根据位置在地图上显示图钉,并能够在图钉周围画圈。如果圆圈很大,则表明在该位置或图钉位置有大量可用。我能够显示这些,但圆圈重叠,这很好,因为位置非常接近,但我的问题是有什么方法可以显示深色圆圈的交叉点,因为它显示白色或透明色。请看一下代码,帮助将不胜感激。我已经在后面的代码中检索到数据,并使用字符串生成器将其传递给 java 脚本。 lats[],longs[] 和 value[] 是纬度、经度和数量值。
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3_aspx"%>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Display on Map</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<script type="text/javascript" src="http://ecn.dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=7.0"></script>
<script type="text/javascript">
function GetMap() {
var map = new Microsoft.Maps.Map(document.getElementById("mapMap"),
{
credentials: "Bingo map key",
center: new Microsoft.Maps.Location(42.274260, -83.365717),
mapTypeId: Microsoft.Maps.MapTypeId.road,
zoom: 8
});
// var backgroundColor = new Microsoft.Maps.Color(10, 100, 0, 0);
var backgroundColor = new Microsoft.Maps.Color(10, 0, 0, 0)
var borderColor = new Microsoft.Maps.Color(150, 200, 0, 0);
//Earth's mean radius in KM is 6371km.
var R = 6371, lat1, long1, d, circlePoints = new Array();
// var location = new Microsoft.Maps.Location(43.3504, -84.5603);
var location = new Microsoft.Maps.Location(42.274260, -83.365717);
for (var i = 0; i < lats.length; i++) {
var loc = new Microsoft.Maps.Location(lats[i], longs[i]);
var pin = new Microsoft.Maps.Pushpin(loc, { text: FcN[i], typeName: 'PinColor', textOffset: new Microsoft.Maps.Point(-45, 0) });
//Display circle
lat1 = (lats[i] * Math.PI) / 180;
long1 = (longs[i] * Math.PI) / 180;
var d = parseFloat(Value[i]) / R;
for (x = 0; x <= 360; x += 5) {
var p2 = new Microsoft.Maps.Location(0, 0);
brng = x * Math.PI / 180;
p2.latitude = Math.asin(Math.sin(lat1) * Math.cos(d) + Math.cos(lat1) * Math.sin(d) * Math.cos(brng));
p2.longitude = ((long1 + Math.atan2(Math.sin(brng) * Math.sin(d) * Math.cos(lat1), Math.cos(d) - Math.sin(lat1) * Math.sin(p2.latitude))) * 180) / Math.PI;
p2.latitude = (p2.latitude * 180) / Math.PI;
circlePoints.push(p2);
}
var polygon = new Microsoft.Maps.Polygon(circlePoints, { fillColor: backgroundColor, strokeColor: borderColor, strokeThickness: 0 });
map.entities.push(polygon);
map.entities.push(pin);
}
map.setView({ center: location, zoom: 10 });
}
</script>
</head>
<body id="body" runat="server">
<form id="form1" runat="server">
<div id="mapMap" style="position:relative;width:600px; height:600px">
<script type="text/javascript">GetMap();
</script>
</div>
</form>
</body>
</html>
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