Re: [Pharo-users] Is there any library to calculate the geographic distance between two points?

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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