Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: query
    From: Vic Fraenckel
    Date: 2002 Aug 21, 15:05 -0400

    If you need a great circle solution I cannot add to the advice to take a
    look at Mr. Williams Aviation formulary as mentioned in Dan Allen's
    response. However, if  you would like a ellipsoidal solution and want to
    roll your own in VB6 I can offer my Open Source software which contains,
    among other functions, Vincenty's Direct solution which i believe solves
    your problem.
    If you are interested in having a look at the code, please send me an e-mail
    with the word GEODESY in the subject line and I will return to you a 24kB
    zip file with every thing you need to build an app to solve your problem. I
    will put your name in my distribution list for updates if you wish. Let me
    know on this.
    Victor Fraenckel - The Windman                 vfraenc1@nycap.rr.com
    KC2GUI                                                      www.windsway.com
          Home of the WindReader Electronic Theodolite
                                   Read the WIND
    "Victory at all costs, victory in spite of all terror, victory however long
    and hard the road may be; for without victory there is no survival."
    - Winston [Leonard Spencer] Churchill (1874 - 1965)
    Dost thou not know, my son, with how little wisdom the world is governed?
    -Count Oxenstierna (ca 1620)
    ----- Original Message -----
    From: "Michael Wescott" 
    Sent: Wednesday, August 21, 2002 2:42 PM
    Subject: Re: query
    | Mitch B Burrill writes:
    | > If I am at lat1, long1,  and go XXX nm at TC YYY, What is the exact
    | > formula from spherical trigonometry to get lat2, long2 ?
    | I would argue that the problem is not sufficiently well specified.
    | Is TC=YYY merely the initial course for a Great Circle trip during
    | which the course will generally vary as the trip progresses. Or is TC
    | to remain constant for the whole trip, i.e. a rhumb line course? Or
    | something else altogether?
    | --
    |         Mike Wescott
    |         Wescott_Mike@EMC.COM

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site