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
    or...
       
    Reply
    Re: Near-pole CN? Transverse Mercator?
    From: David Pike
    Date: 2019 Oct 4, 12:38 -0700

    Until  2000 NZ used the NZMG (NZ mapping grid) which was described as using a complex-number polynomial expansion. This had the advantage of exhibiting minimal scale distortion over New Zealand. However it was a projection unique to New Zealand and so could be difficult to use or program into computer software or positioning devices (eg, GPS receivers).

    In 2000  a change was made to the the New Zealand Transverse Mercator 2000 (NZTM2000) projection.  I understand that NZTM2000 is less accurate than the NZMG but the change was made for the reasons given above.

    David
    Why didn't they use an oblique Mercator running SW-NE like New Zealand?  Cartoon courtesy of   xkcd.com under Creative Commons Attribution-NonCommercial 2.5 License.  DaveP

    File:


       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting 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