Re: [Pharo-users] GPS / Longitude / Latitude library

[Benoit St-Jean via Pharo-users]

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Perhaps porting the R package GeoSphere to Pharo/Squeak/Smalltalk would be an 
option?  It's rather complete and used a lot (at least in the R community) !
https://cran.r-project.org/web/packages/geosphere/geosphere.pdf
----------------- 
Benoît St-Jean 
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"A standpoint is an intellectual horizon of radius zero".  (A. Einstein) 

    On Wednesday, December 5, 2018, 2:24:07 a.m. EST, Alistair Grant 
<akgrant0...@gmail.com> wrote:  
 
 Hi Sven,

On Tue, 4 Dec 2018 at 11:04, Sven Van Caekenberghe <s...@stfx.eu> wrote:
>
> Hi Alistair,
>
> > On 4 Dec 2018, at 10:21, Alistair Grant <akgrant0...@gmail.com> wrote:
> >
> > Hi,
> >
> > Does anyone know of a library for processing GPS coordinates?
> >
> > What I'm looking for are things like:
> >
> > - Parsing from and printing to various string formats (HMS, NESW, decimal)
> > - Distance between two points
> > - etc.
> >
> > Thanks,
> > Alistair
>
> We've got some elementary stuff based on WGS84 coordinates as points. For 
> example,
>
> T3GeoTools distanceBetween: 5.33732@50.926 and: 5.49705@50.82733.
> T3GeoTools bearingFrom: 5.33732@50.926 to: 5.49705@50.82733.
> T3GeoTools destinationFrom: 5.33732@50.926 bearing: 45 distance: 2500.
> T3GeoTools centroidOf: { 5.48230@50.82249. 5.49523@50.81288. 
> 5.50138@50.82008. 5.50228@50.82595. 5.49265@50.82560. 5.48230@50.82249 }.
> T3GeoTools is: 5.33732@50.92601 inside: { 5.48230@50.82249. 5.49523@50.81288. 
> 5.50138@50.82008. 5.50228@50.82595. 5.49265@50.82560. 5.48230@50.82249 }.
>
> This is not open source, but it is not rocket science either (just 
> implementations of public algorithms).

Right, I'll probably have a go at this a put it up on github.

It looks like you've chosen to model the coordinates using the Point
class rather than creating a Coordinate class.  Can you explain why (I
don't have a strong preference either way, so am wondering what your
thinking is).

It also looks like it is longitude @ latitude.  Is that correct?  (I
guess it lines up with the point y value being vertical, which is
latitude.  But most written forms put latitude first).

Thanks!
Alistair

  

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