[Loadstone] Clock-face cardinal discrepancy in exploration mode

monty at loadstone-gps.com monty at loadstone-gps.com
Fri Oct 12 09:30:37 BST 2007


I concur Rob.  Clockface directions are relative and cardinal directions 
are absolute!

Monty

On Fri, 12 Oct 2007, Rob Melchers wrote:

> In Exploration mode the user decides in which direction he wants to 'look' by 
> pressing a rather intuitive key. As a confirmation the program states the 
> direction of the found point. Since the user is not moving there's no 
> direction in which he is moving and thus no relevance in the clockface way of 
> presenting that direction. Take out the clockface menu item and the whole 
> thing is resolved.
>
> Rob
>
> At 10/12/2007, you wrote:
>> Hi,
>> 
>> I understand what Dave is suggesting and yes Shawn you are correct with
>> your key-to-clockface assignments.
>> 
>> Sometimes when people are describing directions in terms of clockface
>> directions they will use terminology such as 6:30.  Which affectively
>> means right of 6:00 and left of 7:00.
>> 
>> I see how this method for some would be better than the current limited
>> clockface directions in Exploration mode since it would use all eight keys
>> but the :30 terminology may confuse some as indeed it has.
>> 
>> If we wanted to get right down to it the GPS/NMEA protocol measures
>> direction in degrees which means there are 360 potential directions.  This
>> means that any other form of reference (such as cardinal, clockface etc)
>> is only an aproximation anyway!
>> 
>> Monty
>> 
>> 
>> On Thu, 11 Oct 2007, Shawn Kirkpatrick wrote:
>> 
>> > I can usually follow things but I'm completely lost on this one. Adding 
>> the
>> > half hours would give 24 points with only 8 direction keys. This leaves 16
>> > directions you can't exactly hit. If I've got this right the pattern would
>> > be: 12:0 1:30 3:0 4:30 6:0 7:30 9:0 11:30. Not what I'd call an intuitive
>> > pattern.
>> >
>> > On Thu, 11 Oct 2007, Dave Mielke wrote:
>> >
>> >> [quoted lines by Shawn Kirkpatrick on 2007/10/11 at 17:04 -0700]
>> >>
>> >>> Wouldn't this make the problem worse?
>> >>
>> >> No, as it adds 12 more points for a total of 24.
>> >>
>> >>> The biggest problem is that there's 12 directions on the clock face but 
>> only 8
>> >>> direction keys.
>> >>
>> >> But if you add the half hours, thereby getting 24 points on the clock 
>> face, and
>> >> since 24 is divible by 8, the problem is resolved.
>> >>
>> >>> I'm also not sure what direction something like 4:30 would represent. 
>> It's
>> >>> been a long time since I've used an analog clock but wouldn't something 
>> like
>> >>> 4:30 represent two different directions?
>> >>
>> >> Don't worry about the minute hand. 4:30 would map to the 9 key, i.e. to 
>> 135
>> >> degrees, since the hour hand would be pointing exactly half way between 
>> 4:00
>> >> and 5:00.
>> >>
>> >> --
>> >> Dave Mielke           | 2213 Fox Crescent | I believe that the Bible is 
>> the
>> >> Phone: 1-613-726-0014 | Ottawa, Ontario   | Word of God. Please contact 
>> me
>> >> EMail: dave at mielke.cc | Canada  K2A 1H7   | if you're concerned about 
>> Hell.
>> >> http://FamilyRadio.com/                   | http://Mielke.cc/bible/
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