如何从谷歌地图API中的多边形区域除外 [英] How to except area from polygon in google maps api
问题描述
我有两个多边形(P1和P2)的坐标在Google地图上创建。当P2位于P1时如何从P1切断P2?
例如 http://quality.iro38.ru/CI/question_about_map.php
这是我的js:
var triangleCoords = [
new google.maps.LatLng(25.774252,-80.190262),
google.maps.LatLng(18.466465,-66.118292),
google.maps.LatLng(32.321384,-64.75737) ,
new google.maps.LatLng(25.774252,-80.190262)
];
var triangleCoords1 = [
new google.maps.LatLng(29,-69),
new google.maps.LatLng(23,-72),
new google.maps .LatLng(25,-70),
new google.maps.LatLng(29,-69)
];
bermudaTriangle = new google.maps.Polygon({
paths:[triangleCoords,triangleCoords1],
strokeColor:'#FF0000',
strokeOpacity:0.8,
strokeWeight :2,
fillColor:'#FF0000',
fillOpacity:0.35
});
bermudaTriangle.setMap(map);
您需要制作内部多边形的卷绕方向与外部多边形的缠绕方向相反。
a> 代码片段: I have coordinates of two polygons (P1 and P2) to create it on google maps. How cut P2 from P1 when P2 is located in P1?
For example http://quality.iro38.ru/CI/question_about_map.php This is my js:
You need to make the winding direction of the inner polygon opposite the winding direction of the outer polygon. code snippet:
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var map; function initialize(){map = new google.maps.Map(document.getElementById(map_canvas),{center:new google.maps.LatLng(37.4419,-122.1419),zoom:13,mapTypeId:google.maps.MapTypeId.ROADMAP}); var bounds = new google.maps.LatLngBounds(); var triangleCoords = [new google.maps.LatLng(25.774252,-80.190262),new google.maps.LatLng(18.466465,-66.118292),new google.maps.LatLng(32.321384,-64.75737),new google.maps.LatLng( 25.774252,-80.190262)]; var triangleCoords1 = [new google.maps.LatLng(29,-69),new google.maps.LatLng(25,-70),new google.maps.LatLng(23,-72),new google.maps.LatLng 29,-69)]; for(var i = 0; i< triangleCoords.length; i ++){bounds.extend(triangleCoords [i]); } for(var i = 0; i< triangleCoords1.length; i ++){bounds.extend(triangleCoords1 [i]); } map.fitBounds(bounds); bermudaTriangle = new google.maps.Polygon({paths:[triangleCoords,triangleCoords1],strokeColor:'#FF0000',strokeOpacity:0.8,strokeWeight:2,fillColor:'#FF0000',fillOpacity:0.35}); bermudaTriangle.setMap(map);} google.maps.event.addDomListener(window,load,initialize);
html,body,#map_canvas {height:100%;宽度:100%; margin:0px;
< script src =https:// //maps.googleapis.com/maps/api/js\"></script><div id =map_canvasstyle =border:2px solid#3872ac;>< / div>
var triangleCoords = [
new google.maps.LatLng(25.774252, -80.190262),
new google.maps.LatLng(18.466465, -66.118292),
new google.maps.LatLng(32.321384, -64.75737),
new google.maps.LatLng(25.774252, -80.190262)
];
var triangleCoords1 = [
new google.maps.LatLng(29,-69),
new google.maps.LatLng(23,-72),
new google.maps.LatLng(25,-70),
new google.maps.LatLng(29,-69)
];
bermudaTriangle = new google.maps.Polygon({
paths: [triangleCoords, triangleCoords1],
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35
});
bermudaTriangle.setMap(map);
var map;
function initialize() {
map = new google.maps.Map(
document.getElementById("map_canvas"), {
center: new google.maps.LatLng(37.4419, -122.1419),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var bounds = new google.maps.LatLngBounds();
var triangleCoords = [
new google.maps.LatLng(25.774252, -80.190262),
new google.maps.LatLng(18.466465, -66.118292),
new google.maps.LatLng(32.321384, -64.75737),
new google.maps.LatLng(25.774252, -80.190262)
];
var triangleCoords1 = [
new google.maps.LatLng(29, -69),
new google.maps.LatLng(25, -70),
new google.maps.LatLng(23, -72),
new google.maps.LatLng(29, -69)
];
for (var i = 0; i < triangleCoords.length; i++) {
bounds.extend(triangleCoords[i]);
}
for (var i = 0; i < triangleCoords1.length; i++) {
bounds.extend(triangleCoords1[i]);
}
map.fitBounds(bounds);
bermudaTriangle = new google.maps.Polygon({
paths: [triangleCoords, triangleCoords1],
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35
});
bermudaTriangle.setMap(map);
}
google.maps.event.addDomListener(window, "load", initialize);
html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}
<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map_canvas" style="border: 2px solid #3872ac;"></div>