Geo coordinates operations

> Esteban A. Maringolo
>
>
> 2013/12/25 Esteban A. Maringolo <[hidden email]>:
>> Has anybody implemented basic methods/classes to calculate distance
>> between two points (lat, long) and similar operations?
>>
>> Regards,
>>
>> Esteban A. Maringolo
>

> Hi Esteban,
>
> On 26 Dec 2013, at 02:23, Esteban A. Maringolo <[hidden email]> wrote:
>
>> Answering myself...
>>
>> I found a solution and transcribed it: http://pastebin.com/ThKDXCKK
>
> This is the formula that we have been using for years in Pharo, Java[Script], Common Lisp:
>
> 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
>
> This is between WGS84 coordinates. It seems simpler than yours. We have been using this page as reference:
>
>  http://www.movable-type.co.uk/scripts/latlong.html
>
> Regards,
>
> Sven
>
>> Esteban A. Maringolo
>>
>>
>> 2013/12/25 Esteban A. Maringolo <[hidden email]>:
>>> Has anybody implemented basic methods/classes to calculate distance
>>> between two points (lat, long) and similar operations?
>>>
>>> Regards,
>>>
>>> Esteban A. Maringolo
>>
>
>

> Uko
>
> On 26 Dec 2013, at 11:35, Sven Van Caekenberghe <[hidden email]> wrote:
>
>> Hi Esteban,
>>
>> On 26 Dec 2013, at 02:23, Esteban A. Maringolo <[hidden email]> wrote:
>>
>>> Answering myself...
>>>
>>> I found a solution and transcribed it: http://pastebin.com/ThKDXCKK
>>
>> This is the formula that we have been using for years in Pharo, Java[Script], Common Lisp:
>>
>> 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
>>
>> This is between WGS84 coordinates. It seems simpler than yours. We have been using this page as reference:
>>
>> http://www.movable-type.co.uk/scripts/latlong.html
>>
>> Regards,
>>
>> Sven
>>
>>> Esteban A. Maringolo
>>>
>>>
>>> 2013/12/25 Esteban A. Maringolo <[hidden email]>:
>>>> Has anybody implemented basic methods/classes to calculate distance
>>>> between two points (lat, long) and similar operations?
>>>>
>>>> Regards,
>>>>
>>>> Esteban A. Maringolo
>>>
>>
>>
>
>

> Hi Esteban,
> On 26 Dec 2013, at 02:23, Esteban A. Maringolo <[hidden email]> wrote:
>> Answering myself...
>>
>> I found a solution and transcribed it: http://pastebin.com/ThKDXCKK
>
> This is the formula that we have been using for years in Pharo, Java[Script], Common Lisp:
>
> distanceBetween: firstPosition and: secondPosition
>   "T3GeoTools distanceBetween: 5.33732@50.926 and: 5.49705@50.82733"