[Loadstone] Clock-face cardinal discrepancy in exploration mode

Sandberg, Robert robert.sandberg at sap.com
Fri Oct 12 10:42:30 BST 2007


Oh please keep that setting option. take out the clock/face if you
please, but leave me the degrees. I have mine set to degrees and it's
the most accurate option. Some of us are hobby sailors and this option
is most useful when determining a heading.

Cheers,
Robbie Sandberg
-----Original Message-----
From: loadstone-bounces at loadstone-gps.com
[mailto:loadstone-bounces at loadstone-gps.com] On Behalf Of Shawn
Kirkpatrick
Sent: 12 October 2007 10:27
To: loadstone at loadstone-gps.com
Subject: Re: [Loadstone] Clock-face cardinal discrepancy in exploration
mode

I tend to really like this idea.
As I see it the simplified cardinal (8 directions) are standard on any 
compass dial and we didn't have to invent anything. A clock face has 
12 standard positions so fits badly in to an 8 key interface. It could
be 
made to fit by doing the every 90 minute thing but that's a rather 
non-standard way of doing things. If we left in all the other half hours
the 
question would come up as to which key to press to move in a given 
direction. This is kind of the problem now. This can also occure if the 
setting is set to just cardinal (all 32 compass points). The other
problem 
with clock face is that every point is reported as being at 12 o'clock
since 
it is in relation to the direction of travel.
All this being said, is the exploration point direction setting needed?
Does 
anyone have this set to anything other than the simplified (8
directions) 
cardinal? If we just remove this setting it might solve a lot of
problems.

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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