DPRG mailing list archives: [DPRG] offroad robot exercises -- 11 Nov 06

Thu Nov 2 00:13:22 CST 2006

A rough estimate of degree directions based on GPS coordinates would be :
 252.12 degrees for 0.0003257 degree measure, ~100 feet? from point 1 to 
point 2
 159.68 degrees for 0.0002879   from 2 to 3
   71.57 degrees for 0.0003162   from 3 to 4
 161.57 degrees for 0.0002846   from 4 to 1

Given the variations from 0.0003257 to 0.0002846 in decimal minute or degree 
measure from GPS readings to estimate 100 feet, can there be any surety of 
degree direction?

This was basic rectangular to polar conversion, but I'm probably neglecting 
the changing measure of degree distance as latitude changes. And also did 
not consider the changes in magnetic North based on position, thinking it's 
about 11 degree difference.

I had hoped to navigate by magnitude and direction (magnetic compass) 
readings, though do not have it finished yet. The compass can be calibrated 
to whatever is defined as North though.

Perhaps there can be another definition of points to navigate, maybe ... 
traffic cones? : )

Dave

----- Original Message ----- 
From: "David P. Anderson" <dpa at io.isem.smu.edu>
To: <dprglist at dprg.org>
Sent: Wednesday, November 01, 2006 2:18 AM
Subject: [DPRG] offroad robot exercises -- 11 Nov 06

> Howdy
>
> For the upcoming DPRG meeting at The Science Place
> on 11 November 2006, I will be presenting a short
> program on the the Borenstein UMBMark test and
> how to use it to calibrate your robot.
>
> Thereafter we will take robots to one of two asphalt
> parking lots on the Fair grounds to run the offroad
> robot exercises for whomever may want test out their
> robots.
>
> Scot Sumner suggested a large parking lot on the north
> side of the Fairgrounds near the Railroad Museum, which
> looks ideal for us, and he says is usually empty.  Here
> are some satellite photographs and GPS coordinates for
> that parking lot.
>
> <http://geology.heroy.smu.edu/~dpa-www/robots/dprg/11nov06/>
>
> best
> dpa
>
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>
>
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