[英]Letting User Draw On a Google Map?
Does anyone know if it's possible to allow a user to draw a line from Point A to point B on a Google map? 有谁知道是否可以允许用户在谷歌地图上从A点到B点画一条线?
If so, how is this usually done? 如果是这样,通常如何做?
You can use the Polylines and specify two points or more using gooogle.maps.LatLng. 您可以使用折线,并使用gooogle.maps.LatLng指定两个或更多点。 Here is a JSFiddle Demo : 这是一个JSFiddle演示 :
//create points on the Polylines
var flightPlanCoordinates = [
new google.maps.LatLng(37.772323, -122.214897),
new google.maps.LatLng(-27.46758, 153.027892)
];
//create the Polyline and feed it points with stroke styling
var flightPath = new google.maps.Polyline({
path: flightPlanCoordinates,
strokeColor: "#FF0000",
strokeOpacity: 1.0,
strokeWeight: 2
});
//set the polylines on the map
flightPath.setMap(map);
To be much more detail as others suggests, the coodinates can be either entered by user either by a click event to place markers as points on the map and then supply the markers coodinates as points for the polylines or you can also create a form where the users can manually enter their address or their lat lng as points to draw the points, but the detail way of drawing the polylines is similar to the above example except Lat Lng are statically coded on the demo. 要像其他人所说的那样更加细节,可以通过点击事件将用户输入,将标记作为点放置在地图上,然后将标记坐标作为折线的点提供,或者您也可以创建一个表格。用户可以手动输入他们的地址或他们的lat lng作为绘制点的点,但绘制折线的详细方法与上面的示例相似,只是Lat Lng在演示中静态编码。
They have sample code which allows you to do this(to see the code simply click view source): 他们有示例代码,允许您执行此操作(只需单击查看源代码即可查看代码):
http://code.google.com/apis/maps/documentation/javascript/examples/polyline-complex.html http://code.google.com/apis/maps/documentation/javascript/examples/polyline-complex.html
event.LatLng
object to get the Latitude and Longitude. 通过查看event.LatLng
对象来获取纬度和经度,从而为折线(用户正在绘制的线)添加一个点。 I am going to be posting the solution on this test page: http://www.comehike.com/draggable_marker.php 我将在此测试页面上发布解决方案: http : //www.comehike.com/draggable_marker.php
At the time of this answer, the solution is not there, but hopefully very soon I will get this working. 在这个答案的时候,解决方案不存在,但希望很快我会得到这个工作。
Yes it is. 是的。 Check out MapMyRun.com for a great example of a use case. 查看MapMyRun.com以获取用例的一个很好的例子。
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