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[DPRG] Long Haul Way Points
Subject: [DPRG] Long Haul Way Points
From: David P. Anderson
dpa at io.isem.smu.edu
Date: Sun Sep 10 11:52:15 CDT 2006
Howdy,
I went by Fair Park yesterday to verify Martin's waypoints and got the
following. John, you might try these out with Google Earth:
start: N 32.77715
W 096.76190
waypt1 N 32.77753
W 096.76208
waypt2 N 32.77770
W 096.76266
waypt3 N 32.77790
W 096.76249
Note that these are specified in decimal degrees (hddd.ddddd) as are Martin's
rather than degrees-minutes-seconds.
The first waypoint is in the shadow of the Science Place building on two sides
and I was only able to get three satellites at that location, so it is not
a very accurate measurement. Likewise with waypt2, which is in the building
shadow and also under a large tree.
For those who might like to try another challenge while we are at FiarPark,
here are the 2 waypoints to go from the meadow next to the Science Place
to the meadow next to Texas Star Ferris wheel, which must circumnavigate the
Band Shell, as jBot demonstrated in a round trip a few months ago:
start: N 32.77634 // Water cover next to TSP
W 096.76179
end: N 32.77631 // In front of Ferris Wheel.
W 096.75965
A little more challenging is the route from the Science Place meadow,
across the entrances and parkinglots to the field behind the Natural
History Museum:
start: N 32.77636 // Water cover next to TSP
W 096.76179
end: N 32.77821 // Behind Nat'l Hist Museum
W 096.76369
For those without obstacle avoidance working, you might want to at least
run a demo course. Here is one laid out earlier this year. This was for
those who might have a navigating robot but don't have obstacle avoidance
working yet.
It begins in front of the Cotton Bowl and has a second
waypoint at a bend in the road, and a third point in
front of the Aquarium where the path is blocked.
Plaza in front of Cotton Bowl (intersection of brick paths):
start: N 32.77790 // Cotton Bowl Plaza
W 096.76112
waypt1 N 32.77707 // Corner of Band Shell:
W 096.76085
finish: N 32.77654 // In front of Aquarium
W 096.76042
Here is an ariel view with the route marked out in red, from
upper left to lower right:
<http://geology.heroy.smu.edu/~dpa-www/robo/jbot/jbot2/fairpark2_x.jpg>
best,
dpa
John wrote:
> I plotted the way points with Google Earth. I don't know what is ground
> truth, that is Google Earth also has errors. I was comparing them to
> the map posted on the web.
>
> Start: Was in the grass NNE of the round doom.
> WP1: Looked like it is on the edge of the sidewalk.
> WP2: Halfway between building and sidewalk, 8 meters from the corner of
> the building (to the southeast)
> Finish: Across 2d street in the parking lot 195 meters from WP2. This
> point was also located here by TopoUSA. Since TopoUSA doesn't show the
> building (all of Fair Park is just a green blob) I couldn't use it to
> verify the other points.
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