Message-ID: <alpine.LRH.2.02.1112210759540.4337@aeolus.ecy.wa.gov>
Date: 2011-12-21T16:04:55Z
From: Clint Bowman
Subject: Gps fraction of degrees function
In-Reply-To: <1324475363.10631.YahooMailNeo@web120105.mail.ne1.yahoo.com>
The following (untested) should get you close:
deg<-as.integer(strsplit(coords, "?")[[1]][1])
min<-as.integer(strsplit(strsplit(coords, "?")[[1]][2],
"'")[[1]][1])
sec<-as.numeric(strsplit(strsplit(strsplit(coords, "?")[[1]][2],
"'")[[1]][2], "\"")[[1]][1])
nswe<-strsplit(strsplit(strsplit(coords, "?")[[1]][2],
"'")[[1]][2], "\"")[[1]][2]
deg.frac<-((sec/60+min)/60+deg
deg.frac<-ifelse(nswe=="S"|nswe=="E",-deg.frac,deg.frac)
Clint
--
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On Wed, 21 Dec 2011, Alaios wrote:
> Dear all,?? I have the following written example
>
>> coords <- "51?30'48.58\"N"
>>
>> as.integer(strsplit(coords, "?")[[1]][1])
> [1] 51
>> as.integer(strsplit(strsplit(coords, "?")[[1]][2], "'")[[1]][1])
> [1] 30
>> as.numeric(strsplit(strsplit(strsplit(coords, "?")[[1]][2], "'")[[1]][2], "\"")[[1]][1])
> [1] 48.58
>> strsplit(strsplit(strsplit(coords, "?")[[1]][2], "'")[[1]][2], "\"")[[1]][2]
> [1] "N"
>
>
> My code gets from the coords degrees , minutes, seconds and finally the N/S/W/E
>
> Could you please tell me if there is any function in R that can convert all the above into fractions of degrees (single numerical value).
>
> B.R
> Alex
>
> [[alternative HTML version deleted]]
>
>