Descent: 10 feet (3 m)
Description:
Starting from Los Trancos, this road climbs up to Vista Verde.
The road is smooth and steady. A third of the way up, a guardrail
on the left side separates you from a steep forested ravine.
Altimeter altitude
(Altitude linearly interpolated from altimeter
samples, and smoothed with a 0.04mi gaussian.)
Each horizontal line is 100 feet. Each vertical
line is 0.2 miles. Gradiometer grade
(Grade linearly interpolated from gradiometer
samples, and smoothed with a 0.04mi gaussian.)
Each horizontal line is 2% grade. Each vertical
line is 0.2 miles. Altimeter grade
(Grade linearly interpolated from altimeter
samples, and smoothed with a 0.20mi gaussian.)
Each horizontal line is 2% grade. Each vertical
line is 0.2 miles. Comparison of grades
(Green grade is from the gradiometer, magenta grade
is from the altimeter, and white is where they
overlap.)
Each horizontal line is 2% grade. Each vertical
line is 0.2 miles.
Overall (averaging my first 20 hills),
the gradiometer grade averages 0.63 (% grade)
higher than the altimeter grade, with a standard
deviation of 4.5 (% grade per road).
This error may be due to:
-
Uneven sampling -- I take more samples when the
hill gets steep.
-
Calibration error (of the gradiometer or
altimeter).
In the end, though, I think that each individual
sample is accurate to within about 2% for that
instantaneous segment of road. My results may
not always agree with my altimeter, but they are
generally repeatable within 1%. I think that
I just need to take more samples to generate
more accurate graphs.
Raw Data:
Dist Grade Alti. Location
---- ----- ------ --------
0.00 0% 830 start - Los Trancos
0.01 -9% 820
0.04 -2% 820 115 Ramona
0.08 0% 820
0.10 12% 830
0.14 -1% 840
0.18 12% 850
0.20 14% 860
0.22 15% 870
0.25 15% 890 guardrail
0.30 15% 930 right zig
0.33 17% 950 left zag
0.37 15% 970 right zag
0.42 14% 1010
0.47 7% 1030
0.51 11% 1060
0.55 15% 1080
0.57 16% 1100
0.62 16% 1130
0.66 16% 1160
0.69 12% 1180
0.71 3% 1200 end - Vista Verde
Back to
Lucas's
cycling gradiometer page.
