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Subject:
Re: Algorithms for lat/long conversion to a mapping grid
From:
"Gerald I. Evenden" <[log in to unmask]>
Reply To:
Maps and Air Photo Systems Forum <[log in to unmask]>
Date:
Tue, 19 Jul 1994 10:31:37 EDT
Content-Type:
text/plain
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----------------------------Original message----------------------------
>Date:         Tue, 19 Jul 1994 09:01:35 EDT
>From: Roger Edgecombe <[log in to unmask]>
>Subject:      Algorithms for lat/long conversion to a mapping grid
>To: Multiple recipients of list MAPS-L <[log in to unmask]>
>
>----------------------------Original message----------------------------
>Anybody please:
>
>I'm interested in converting lat/long readings (from a GPS) on to a
>mapping grid. Could anyone point me at a source of  the necessary
>algorithms. Thanks in advance.
>
>Roger Edgecombe
 
I presume that lat/lon to mapping grid conversion is the request.
 
In terms of algorithms, the question is do you want mathematical
definitions, computer language source code or a program that will
perform the transformations?
 
For description of many projections, the best source is:
 
        "Map Projections---A Working Manual" by John P. Snyder
        USGS Prof. paper 1395
 
For C source code for over 100 projections as well as application
programs:
 
        ftp charon.er.usgs.gov (128.128.40.24) in directory pub/PROJ.4
        check README for details.
 
Gerald (Jerry) I. Evenden   Internet: [log in to unmask]
voice: (508)563-6766          Postal: P.O. Box 1027
  fax: (508)457-2310                  N.Falmouth, MA 02556-1027

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