[R] conversion of d m s (lat) d m s (long) coordinates into decimal coordinates

[Rui Barradas]

Hello,

See if this StackOverflow.com post [1] solves your problem.

Also, examples should be minimal, you don't need all those packages to 
solve this problem.


[1]  https://stackoverflow.com/a/69485865/8245406


Hope this helps,

Rui Barradas

Às 21:43 de 24/04/2022, Nicolas Degallier escreveu:
> Dear R Users,
> 
> I am using a 'simple' script to draw maps with points.
> It runs fine with the following libraries:
> library(sp)
> library(maptools)
> library(maps)
> library(mapdata)
> library(RColorBrewer)
> library(MASS)
> library(rgeos)
> library(GISTools)
> 
> Until now, to prepare the input data, I have used manually some free net converter because the number of points to plot was not too high.
> Now I have much more points coordinates to convert from a GPS ° ' " (d m s) format to a decimal format which will be accepted by the R script to build maps.
> 
> My initial data is of the form (tab delimited text file):
> 
> nom	lat	long
> "D. antoinei"	6°04' S	50°12'W
> "D. antoinei"	3°45'S	49°40'W
> "D. antoinei"	3°1'49"N	53°6'24"W
> "D. barberoi"	13°03.3’S	71°32.7’W
> "D. barberoi"	10°59.3’S	75°25.5’W"
> 
> and I need them in the format (tab delimited):
> 
> nom	lat	long
> "D. antoinei"	-11.944478527683975	-71.28298997950684
> "D. antoinei"	-12.833333	-69.333333
> "D. antoinei"	3.333333	-60.283333
> "D. barberoi"	-10.366667	-67.683333
> "D. barberoi"	-15.314500	-55.970300
> 
> Is there some 'simple' R script to do such a conversion?
> I am using R v. 3.2.1. on a iMac OS 10.6.8.
> 
> May be this topic had already been resolved but I was unable to find the result in the FAQs.
> Cheers
> Nicolas Degallier
> 
> 
> <nicolas.degallier using free.fr>
> <omalodes using yahoo.fr>
> 
> Publications :
> https://www.documentation.ird.fr/listes/parauteur/DEGALLIER/NICOLAS/tout/annee
> 
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