Getting started with geographical coordinates

hakan at hakan at
Fri Apr 3 16:30:45 EDT 2020

Most of the mobileSomething are wrappers around the system functions so you can learn a lot by reading the ios developer documentation as most of the functions started there.
And reading the docs I can see that you probably get a CLLocationCoordinate2D from the system and that is in turn two doubles in the WGS 84 system. I.e. you get a float for longitude and latitude.

I have code for distance calculation somewhere, that I built for a Quiz walk app, that I made for my sons birthday party several years ago. If you are interested I can dig it up.

I remember that the biggest problem was not calculating the distance it was translating lat long to some meaningful x,y coordinate.

On 3 Apr 2020, 21:50 +0200, Graham Samuel via use-livecode <use-livecode at>, wrote:
> This is cheeky but I can’t run up my mobile simulation today - can someone tell me the format of the geographical coordinates produced by mobileSensorReading et al. I mean, is say latitude just one integer showing seconds, or is it deg, min, sec - and are fractional seconds returned (so, floating point)? I shall find out for myself eventually but it would help a little to know now. AFAIKS there’s nothing in the LC documentation about it.
> Graham
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