[Loadstone] Clock-face cardinal discrepancy in exploration mode
charlieofalbany at hotmail.com
Fri Oct 12 21:32:31 BST 2007
I'm getting a thought on this after reading this. Since 360 is divisible by
8 there would be 45 degrees per position. If up arrow is 0 degrees, the 45
degree sweep would go from 337.5 to 22.5 degrees. The northeast pointer
would be from 22.5 degrees to 67.5 and the right arrow would be 67.5 to
112.5 until coming right back around to the up arrow. But in clock terms
would this be 12 o'clock for the up arrow, 1:30 for the northeast point and
3 o'clock for the right arrow and so on?
This is logically confusing, so the average user might find this a bit
----- Original Message -----
From: <monty at loadstone-gps.com>
To: <loadstone at loadstone-gps.com>
Sent: Friday, October 12, 2007 1:54 AM
Subject: Re: [Loadstone] Clock-face cardinal discrepancy in exploration mode
> 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!
> On Thu, 11 Oct 2007, Shawn Kirkpatrick wrote:
>> I can usually follow things but I'm completely lost on this one. Adding
>> half hours would give 24 points with only 8 direction keys. This leaves
>> directions you can't exactly hit. If I've got this right the pattern
>> be: 12:0 1:30 3:0 4:30 6:0 7:30 9:0 11:30. Not what I'd call an intuitive
>> 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.
>>>> been a long time since I've used an analog clock but wouldn't something
>>>> 4:30 represent two different directions?
>>> Don't worry about the minute hand. 4:30 would map to the 9 key, i.e. to
>>> degrees, since the hour hand would be pointing exactly half way between
>>> and 5:00.
>>> Dave Mielke | 2213 Fox Crescent | I believe that the Bible is
>>> Phone: 1-613-726-0014 | Ottawa, Ontario | Word of God. Please contact
>>> EMail: dave at mielke.cc | Canada K2A 1H7 | if you're concerned about
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