Melendy Drive, San Carlos map

Statistics:

Max. grade: 17%
Main climb:
Avg. grade: 8.5% (elev. gain/dist)
Length: 1.36 miles (2.19 km)
Elev. gain: 610 feet (186 m)
Entire profile:
Avg. grade: 8.2%
Length: 1.45 miles (2.33 km)
Climb: 610 feet (186 m)
Descent: 20 feet (6 m)

Description:

Melendy Drive is yet another residential street that climbs from Alameda up to Hillcrest. The grade varies widely, from 17% sections to flat sections. It even ends with a downhill.

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:

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	 5%	210	start - Alameda
0.01	 3%	210	
0.03	 3%	210
0.05	11%	220
0.09	11%	240
0.12	13%	260
0.14	13%	280	2428 Melendy
0.17	12%	290
0.19	13%	300
0.22	15%	320	2452 Melendy
0.25	 8%	340	Heather Drive
0.26	14%	340	
0.30	15%	370	2504 Melendy
0.32	10%	380
0.34	 2%	380
0.38	 3%	390
0.40	 6%	400
0.42	14%	410
0.45	15%	430
0.47	 5%	430
0.49	 9%	440
0.53	 9%	460
0.56	11%	480
0.58	14%	490
0.61	15%	520
0.64	17%	540	right bend above 2780
0.65	13%	550
0.67	 8%	560	Portofino Road
0.68	14%	560
0.69	16%	570
0.71	 8%	580
0.73	 6%	590
0.77	 6%	590
0.80	 1%	600
0.85	 1%	600
0.91	 0%	610
0.93	 8%	610
0.94	15%	620
0.97	15%	640	before Peccadilly Court
1.00	14%	660
1.04	15%	690
1.06	16%	700	3730 Melendy
1.08	12%	710
1.10	 7%	720	Cabot Court
1.11	15%	730
1.13	16%	750	3308 Melendy
1.15	16%	760
1.19	16%	780
1.22	 0%	800
1.33	 1%	810
1.36	 5%	810
1.38	 4%	810
1.39	 0%	820	top
1.42	-10%	810
1.45	-11%	800	end - Crestview Drive


Back to Lucas's cycling gradiometer page.