[Loadstone] Saving accurate point coordinates.

Len Burns len at gatamundo.com
Thu Jul 19 06:10:23 BST 2007


Nor have I in South San Francisco Bay area, California, Los Angeles,
Chicago nor New York City.

-Len
On Thu, 19 Jul 2007, Jim Ruby wrote:

> I have never seen waas enabled and I have traveled in Minnesota, south
> Dakota, Wisconsin, ilinois, Indiana and ohio. And I do have it set to on in
> the settings.
>
> I wonder where this is mainly used.
>
>
>
>
> -----Original Message-----
> From: loadstone-bounces at loadstone-gps.com
> [mailto:loadstone-bounces at loadstone-gps.com] On Behalf Of Shawn Kirkpatrick
> Sent: Wednesday, July 18, 2007 11:23 PM
> To: loadstone at loadstone-gps.com
> Subject: Re: [Loadstone] Saving accurate point coordinates.
>
> You may have waas enabled but might not be getting it anyway. On my royaltek
>
> I've never seen it get a waas signal. You can check this by checking the gps
>
> quality, if it says differencial fix then you have waas, if not then you
> have standard gps. The accuracy for standard gps is around 15 meters. If
> your points are within that then things are ok. You can make manual
> adjustments to the coordinates with the point update window. The problem
> there is you wouldn't know what the "accurate" value should be. Every time
> you were on the point the gps receiver could give different coordinates. So
> a correction that seemed to work one day could be completely inaccurate the
> next. No matter how accurate the point coordinates are you still have the
> gps drift to deal with. In the worst case those two inaccuracies add
> together to create a bad result but in practice this doesn't seem to happen
> too often.
> I guess the real solution to this is to wait for better quality consumer
> receivers to come out or get your hands on some military-grade hardware.
>
> On Wed, 18 Jul 2007, Dave Mielke wrote:
>
>> [quoted lines by Shawn Kirkpatrick on 2007/07/18 at 17:30 -0700]
>>
>>> What you're experiencing is gps drift and it's to be expected.
>>
>> Yes, I understand this.
>>
>>> If your is waas capable this drift can go down quite a bit when standing
> still
>>> but will still be there.
>>
>> It is, and I always leave it on.
>>
>>> We've considered putting in some sort of averaging
>>> but you'd have to be standing still for some period of time for it to
> work.
>>
>> Wel;l, in this case I was sitting, but I understand what you're saying.
>>
>>> Even then it would only be an average so still not quite accurate.
>>
>> However inaccurate it may remain, it'd surely be better than an
> instantaneous
>> single capture which just might be way off.
>>
>> Another approach mightr be for the user to be able to move a point by an
> amount
>> in a direction. That way, he could make an imperical judgement based on
> several
>> measurements and then make manual adjustments.
>>
>> --
>> 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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--

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and leave a trail."
~ Ralph Waldo Emerson ~


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