Re: 1,570 Voted!!!

["Robert Morris" <bobmorris@rmci.net>]

As for the  GPS measurement of trails. My experience using differential
corrections (not used by the general public) has shown repeatability in the
range of four to six feet over 25 to 30 miles of trail mapping.
Repeatability of two to four feet in the location of the plotted trail
alignment.

Be assured that the rides I measure will be fully documented and supported
by recorded data including maps plotted to accurate scale.

Remember, good GPS data is as accurate as a measuring wheel. Poor GPS data
is as poor as the map measurements some rides use.

Bob Morris
Morris Endurance Enterprises
Boise, ID
-----Original Message-----
From: Truman Prevatt <truman.prevatt@netsrq.com>
To: Randy H Eiland <renegade12@juno.com>
Cc: ridecamp@endurance.net <ridecamp@endurance.net>
Date: Friday, December 04, 1998 1:49 PM
Subject: Re: 1,570 Voted!!!


>If they want to dispute it they had better do a lot better than turn their
>GPS on at the start and trun it off at the end.  I don't know of many
trials
>where there will not be long stretches of trial where the signals from one
>or more of the space craft will be severely attenuated because of folage or
>obstruction will be corrupted by mutlipath interference.  In which case the
>data procossed during that period is suspect and the overal measurment made
>using those data will be unreliable.
>
>GPS is good but it depends on the collection of clear strong direct path
>signals from the space craft.  This would not be the case under the canopy
>folage, in canyons or deep valleys or on many mountain sides.
>
>Truman
>
>Randy H Eiland wrote:
>
>> points or regional-national mileage credit on a LD ride.  Already we see
>> many
>> riders carrying GPS units and I feel certain someone in the near future
>> will
>> dispute/protest the distance, especially if they have the wherewithal and
>> are
>> competing for National or Regional Mileage Awards.
>
>--
>Truman Prevatt
>Brooksville, FL
>
>Mystic "The Horse from Hell" Storm with one on the way
>Rocket a.k.a. Mr. Misty
>Jordy a.k.a. Bridger (when he is good)
>Danson Flame - Hot Dog I'm healed and ready to go.
>
>
>