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: On the integration of location and data
    From: Lu Abel
    Date: 2009 Nov 02, 22:26 -0800
    Peter Fogg wrote:

    Lu wrote:

    While a "traditional" GPS doesn't necessarily have or need a built-in
    compass, if one thinks about it for a moment one realizes that
    automotive navigational systems DO need a built-in compass.   Else if
    you punch in an address while parked, how would they know whether or not
    to make the first instruction "make a U-turn?"
    Isn't it via reference to the location of the place you want to get to, and the track between them?
    But think about it for a moment.   Supposed I simply specify an address a half mile down the street.   My auto navigation system certainly knows where I am (and therefore the track needed to get to my destination), but how does it know whether my car is pointed in the proper direction?   Is the command it will give "proceed 1/2 mile down the street to your destination" or "make a U-turn and then proceed 1/2 mile down the street to your destination?"

    I don't have a nav system in my car (I think they're only for boats :-P ), but when I've traveled in friends' cars that have one, I'm pretty sure it tells you what to do before you've even pulled out from the curb (and certainly before it can infer which way one is pointing by a chain of positions)

    --~--~---------~--~----~------------~-------~--~----~
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To unsubscribe, email NavList+unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---

       
    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