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

[Rui Barradas]

Hello,

You have a problem with the numbers format and with the smart single 
close quotes. Try to substitute single quotes for the problem characters.

Hope this helps,

Rui Barradas

Às 14:03 de 26/04/2022, Nicolas Degallier escreveu:
> Hi Rui,
> 
> I succeded to convert a coordinate from decimal to DMS formats but not the inverse!!!
> 
>   dd<- -52.55684
> c<-dd2dms(dd, NS = FALSE)
> c
> [1] 52d33'24.624"W
>>
> 
> The use of char2dms() function is not so easy because I cannot yet read() the text file with the DMS coordinates (one col. with the points names, lat col. and long. col.)!!
> 
> 
> 
> 
> Cheers
> Nicolas
> 
> 
> 
> 
> Hello,
> 
> Here is the link to the archived versions of package measurements [1].
> But the edit to that answer has another solution, with sp::char2dms and you are loading package sp.
> 
> 
> [1] https://cran.hafro.is/src/contrib/Archive/measurements/
> 
> Hope this helps,
> 
> Rui Barradas
> 
> Às 10:57 de 25/04/2022, Nicolas Degallier escreveu:
>> Hi Rui,
>> Thanks for the information.
>> Unfortunately, my versions of MacOS and of R are too old:
>>> install.packages("measurements")
>> Warning message:
>> package ‘measurements’ is not available (for R version 3.2.1)
>>> library(measurements)
>> Warning message:
>> le package ‘measurements’ a été compilé avec la version R 3.2.5
>> There is no older package to do the same?
>> Cheers
>> Nicolas
>> Le 25 avr. 2022 à 11:12, Rui Barradas a écrit :
>>> Hello,
>>>
>>> See if this StackOverflow.com <http://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 <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):
>>>> nomlatlong
>>>> "D. antoinei"6°04' S50°12'W
>>>> "D. antoinei"3°45'S49°40'W
>>>> "D. antoinei"3°1'49"N53°6'24"W
>>>> "D. barberoi"13°03.3’S71°32.7’W
>>>> "D. barberoi"10°59.3’S75°25.5’W"
>>>> and I need them in the format (tab delimited):
>>>> nomlatlong
>>>> "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 <mailto:nicolas.degallier using free.fr>>
>>>> <omalodes using yahoo.fr <mailto:omalodes using yahoo.fr>>
>>>> Publications :
>>>> https://www.documentation.ird.fr/listes/parauteur/DEGALLIER/NICOLAS/tout/annee <https://www.documentation.ird.fr/listes/parauteur/DEGALLIER/NICOLAS/tout/annee>
>>>> ______________________________________________
>>>> R-help using r-project.org <mailto:R-help using r-project.org> mailing list -- To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/r-help <https://stat.ethz.ch/mailman/listinfo/r-help>
>>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html <http://www.R-project.org/posting-guide.html>
>>>> and provide commented, minimal, self-contained, reproducible code.
>>>>
>>>> ______________________________________________
>>>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>>> and provide commented, minimal, self-contained, reproducible code.