From: Jean Louis <bugs@gnu.support>
To: arthur miller <arthur.miller@live.com>
Cc: Help GNU Emacs <help-gnu-emacs@gnu.org>
Subject: dms2dd Re: Expanding list into string within a command
Date: Sun, 6 Dec 2020 23:34:52 +0300 [thread overview]
Message-ID: <X81AbBRQCNLbdGO/@protected.rcdrun.com> (raw)
In-Reply-To: <AM0PR06MB65779109E8EB3527FACCED5E96CF0@AM0PR06MB6577.eurprd06.prod.outlook.com>
I have actually forgot that I have already transitioned Common Lisp to
Emacs Lisp to convert DMS to DD coordinates.
(defun geo/dms-parse (dms)
(let* ((cardinal (cond ((string-match "N" dms) "N")
((string-match "S" dms) "S")
((string-match "E" dms) "E")
((string-match "W" dms) "W")
(t (error "No cardinal direction found"))))
(parts (string-replace-non-digits-for-spaces dms))
(parts (string-trim parts))
(parts (string-replace-shorten-spaces parts))
(parts (split-string parts))
(degrees (string-to-number (car parts)))
(minutes (string-to-number (cadr parts)))
(seconds (string-to-number (caddr parts))))
(list degrees minutes seconds cardinal)))
(defun geo/dms2dd-degrees (d)
(truncate d))
(defun geo/dms2dd-minutes (m)
(float (/ m 60.0)))
(defun geo/dms2dd-seconds (s)
(float (/ s 3600.0)))
(defun geo/dms2dd (dms)
"Converts DMS value to DD geo value"
(let* ((dms (geo/dms-parse dms))
(degrees (car dms))
(minutes (cadr dms))
(seconds (caddr dms))
(cardinal (cadddr dms))
(dd (+ (geo/dms2dd-degrees degrees)
(geo/dms2dd-minutes minutes)
(geo/dms2dd-seconds seconds))))
(cond ((string= "S" cardinal) (- dd))
((string= "W" cardinal) (- dd))
(t dd))))
prev parent reply other threads:[~2020-12-06 20:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-06 19:46 Expanding list into string within a command Jean Louis
2020-12-06 19:57 ` arthur miller
2020-12-06 20:30 ` Jean Louis
2020-12-06 19:57 ` [solved] " Jean Louis
2020-12-06 20:07 ` arthur miller
2020-12-06 20:34 ` Jean Louis [this message]
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