2016-10-05 19:00 GMT-03:00 Sven Van Caekenberghe <sven@stfx.eu>:

Hi Paul,

This is what we use (given WGS84 coordinates)

T3GeoTools class>>#distanceBetween: firstPosition and: secondPosition
�� "T3GeoTools distanceBetween: 5.33732@50.926 and: 5.49705@50.82733"

�� | c |
�� c := (firstPosition y degreeSin * secondPosition y degreeSin)
�� + (firstPosition y degreeCos * secondPosition y degreeCos
�� * (secondPosition x degreesToRadians - firstPosition x degreesToRadians) cos).
�� c := c >= 0 ifTrue: [ 1 min: c ] ifFalse: [ -1 max: c ].
�� ^ c arcCos * 6371000

Sven

> On 05 Oct 2016, at 23:28, Paul DeBruicker <pdebruic@gmail.com> wrote:
>
> umm ... here is a good place to start
>
> http://forum.world.st/Geo-coordinates-operations-td4732373.html#a4732441
>
>
>
> Paul DeBruicker wrote
>> I've got a few objects with latitude and longitude and want to be able to
>> find the nearest from a collection
>>
>>
>> Thanks
>>
>> Paul
>
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>
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>
> --
> View this message in context: http://forum.world.st/Is-there-any-library-to-calculate-the-geographic-distance-between-two-points-tp4918207p4918208.html
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>