如何在Google Maps API上的标记周围添加圆圈 [英] How to add circles around markers on Google Maps API
本文介绍了如何在Google Maps API上的标记周围添加圆圈的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
这是我用来在Google地图的多个位置上显示标记的代码. 我要添加一个标记,并在标记周围添加一个5公里的圆圈.
This is a code that I use to display markers on several places in google maps. I want to make an addition to this and add a 5km circle around the markers.
我尝试添加没有运气的这段代码:
I tried with adding this block of code without luck:
var circle = new google.maps.Circle({
center:position,
radius: radius,
fillColor: "#0000FF",
fillOpacity: 0.1,
map: map,
strokeColor: "#FFFFFF",
strokeOpacity: 0.1,
strokeWeight: 2
});
这是下面的完整代码,这是一个jsfiddle供参考
this is the full code below, and here is a jsfiddle for reference
var center = "Vilnius, Lithuania";
var locations = [
['Tuskulėnų g. 20, Vilnius 09211, Lithuania', "some info"],
['Stumbrų g. 21, Vilnius 08101, Lithuania', "more information"],
['Kalvarijų g. 55, Vilnius 09317, Lithuania', "blah, blah"],
['Birželio 23-iosios g. 6, Vilnius 03204, Lithuania', "other information"],
['Teatro g. 6, Vilnius 03107, Lithuania', "to be determined"]
];
var geocoder;
var map;
var infoWin = new google.maps.InfoWindow();
function initialize() {
geocoder = new google.maps.Geocoder();
map = new google.maps.Map(
document.getElementById("map_canvas"));
// center and zoom map on "center" address
geocoder.geocode({
address: center
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.fitBounds(results[0].geometry.bounds);
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
for (var i = 0; i < locations.length; i++) {
codeAddress(locations[i], i);
}
}
function codeAddress(location, i) {
geocoder.geocode({
'address': location[0]
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
var marker = new google.maps.Marker({
map: map,
title: "marker " + i,
position: results[0].geometry.location
});
google.maps.event.addListener(marker, 'click', function(evt) {
infoWin.setContent(location[0] + "<br>" + location[1]);
infoWin.open(map, this);
})
//i added this block
var circle = new google.maps.Circle({
center:position,
radius: radius,
fillColor: "#0000FF",
fillOpacity: 0.1,
map: map,
strokeColor: "#FFFFFF",
strokeOpacity: 0.1,
strokeWeight: 2
});
//end of block addition
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
google.maps.event.addDomListener(window, "load", initialize);
更新
这是我从控制台获得的
radius is not defined
推荐答案
您只需定义radius
和position
变量,例如:
You have just to define radius
and position
variable, e.g :
var radius = 1000;
var position = marker.getPosition();
要进行缩放,可以使用map.setZoom();
,例如在setCenter
之后添加它:
And for tha zoom you can use map.setZoom();
, add it after setCenter
for example :
map.setCenter(results[0].geometry.location);
map.setZoom(5);
工作中的小提琴 .
Working fiddle.
代码段:
var center = "Vilnius, Lithuania";
var locations = [
['Tuskulėnų g. 20, Vilnius 09211, Lithuania', "some info"],
['Stumbrų g. 21, Vilnius 08101, Lithuania', "more information"],
['Kalvarijų g. 55, Vilnius 09317, Lithuania', "blah, blah"],
['Birželio 23-iosios g. 6, Vilnius 03204, Lithuania', "other information"],
['Teatro g. 6, Vilnius 03107, Lithuania', "to be determined"]
];
var geocoder;
var map;
var infoWin = new google.maps.InfoWindow();
function codeAddress(location, i) {
geocoder.geocode({
'address': location[0]
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
map.setZoom(5);
var marker = new google.maps.Marker({
map: map,
title: "marker " + i,
position: results[0].geometry.location
});
google.maps.event.addListener(marker, 'click', function(evt) {
infoWin.setContent(location[0] + "<br>" + location[1]);
infoWin.open(map, this);
})
var radius = 1000;
var position = marker.getPosition();
var circle = new google.maps.Circle({
center: position,
radius: radius,
fillColor: "#0000FF",
fillOpacity: 0.1,
map: map,
strokeColor: "#FFFFFF",
strokeOpacity: 0.1,
strokeWeight: 2
});
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
google.maps.event.addDomListener(window, "load", function() {
geocoder = new google.maps.Geocoder();
map = new google.maps.Map(
document.getElementById("map_canvas"));
// center and zoom map on "center" address
geocoder.geocode({
address: center
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
google.maps.event.addListenerOnce(map, 'bounds_changed', function() {
map.setZoom(map.getZoom() + 3);
});
map.fitBounds(results[0].geometry.bounds);
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
for (var i = 0; i < locations.length; i++) {
codeAddress(locations[i], i);
}
});
html,
body,
#map_canvas {
height: 100%;
width: 100%;
}
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js"></script>
<div id="map_canvas"></div>
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