Re: [android-developers] Need some math assistance please

Thanks for your reply - I was not aware of the static method!

2011/9/3 Kostya Vasilyev <kmansoft@gmail.com>:
> Location (IIRC) has a static method to calculate distance.
>
> --
> Kostya Vasilyev
>
> 03.09.2011 16:08 пользователь "Fred Niggle" <fred.niggle@googlemail.com>
> написал:
>> Hello,
>>
>> I'm trying to work out the distance moved between 2 points with GPS
>> coordinates.
>>
>> I have found the haversine function, but I'm not sure how to convert
>> it to run within androids java.
>>
>> Can anyone help?
>>
>> JavaScript:
>>
>> var R = 6371; // km
>> var dLat = (lat2-lat1).toRad();
>> var dLon = (lon2-lon1).toRad();
>> var lat1 = lat1.toRad();
>> var lat2 = lat2.toRad();
>>
>> var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
>> Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2);
>> var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
>> var d = R * c;
>>
>> Regards,
>> Fred
>>
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