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2013-11-18T09:57:56.890
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tl;dr? <a href="http://jsfiddle.net/kaiser/Hhb5M/" rel="nofollow">jsFiddle here</a> - look at your console output. Basically there're two ways to do this: <ol> <li>Check if the (marker of) the user is inside the Circle Bounds</li> <li>Compute the distance between the user and the center of the Circle. Then check if it is equal or smaller than the Circle Radius. This solution needs the <code>spherical</code> library to work.</li> </ol> <h2>Circle Bounds</h2> Just add a circle: <pre><code>circle = new google.maps.Circle( { map : map, center : new google.maps.LatLng( 100, 20 ), radius : 2000, strokeColor : '#FF0099', strokeOpacity : 1, strokeWeight : 2, fillColor : '#009ee0', fillOpacity : 0.2 } ) </code></pre> and then check if the marker is inside: <pre><code>circle.getBounds().contains( new google.maps.LatLng( 101, 21 ) ); </code></pre> At a first glance you might think this works. But it doesn't. In the background google (still) uses a rectangle, so everything inside the rectangular bounding box, but outside the circle will be recognized as inside the latLng bounds. It's wrong and a known problem, but it seems Google doesn't care. If you now think that it would work with rectangular bounds, then you're wrong. Those don't work either. <h2>Spherical Distance</h2> The easiest and best way is to measure the distance. Include the spherical library by appending <code>&library=spherical</code> to your google maps script call. Then go with <pre><code>google.maps.geometry.spherical.computeDistanceBetween( new google.maps.LatLng( 100, 20 ), new google.maps.LatLng( 101, 21 ) ) <= 2000; </code></pre>
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1. POHow to check if user is inside a Circle Google maps v2
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1. COThis would be perfect but this is for javascript
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2. CO@MiguelRivera IIRC The underlying API should be the same. You'll have to find the appropriate equivalents, but aside from that ... :)
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