Welcome to the NavList Message Boards.

NavList:

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

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Cosine vs haversine formulas
    From: Robert VanderPol II
    Date: 2017 Nov 18, 17:33 -0800
    What are the relative advantages of the cosine vs formulas?
    Cosine formula is computationally faster but requires more precision than the haversine formula. 

    As I understand it for manual computation haversines have significantly smaller tables, easier math steps but also more math steps. 

    For computer implementation Cosine is more accurate and takes about 2/3 the time to calc but requires that what ever language you are using be able to handle the acos function well which is not always the case. https://gis.stackexchange.com/questi...ing-distance-b
    __________________
       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    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