我想在 map 上添加一个圆圈，在我从谷歌地图获得的当前标记的位置可以吗？我对html和javascript的了解非常有限。 这是我的代码..
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Reverse Geocoding</title>
<style>
html, body, #map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}
</style>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp"></script>
<script>
var geocoder;
var map;
var marker;
var infowindow = new google.maps.InfoWindow();
function initializeMap() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
revereGeoCode(position.coords.latitude, position.coords.longitude);
});
} else {
console.log("er")
// make sure to handle the failure
}
var mapOptions = {
zoom: 20,
center: new google.maps.LatLng(38.078111, 23.734414),
mapTypeId: 'roadmap'
}
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
}
function revereGeoCode(lat, lng) {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(lat, lng);
geocoder.geocode({
'LatLng': LatLng
}, function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
if (results[1]) {
// place your marker coding
map.setZoom(20);
// Define circle options
var circleOptions = {
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35,
map: map,
center: latlng,
radius: 20
};
// Add the circle to the map.
var markerCircle = new google.maps.Circle(circleOptions);
marker = new google.maps.Marker({
position: latlng,
map: map
});
infowindow.setContent(results[0].formatted_address);
infowindow.open(map, marker);
} else {
alert('No results found');
}
} else {
alert('Geocoder failed due to: ' + status);
}
});
}
google.maps.event.addDomListener(window, 'load', initializeMap);
</script>
</head>
<body>
<div id="map-canvas"></div>
</body>
</html>
html 和 javascript 非常有限。这是我的代码..
最佳答案
只需创建圆圈并使用与标记相同的坐标定义其中心即可。
// Define circle options
var circleOptions = {
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35,
map: map,
center: latlng,
radius: 20
};
// Add the circle to the map.
var markerCircle = new google.maps.Circle(circleOptions);
就是这样。
关于javascript - 在标记中心添加圆圈，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25192737/