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Tobler's hiking function – walking speed vs. slope angle chart. Tobler's hiking function is an exponential function determining the hiking speed, taking into account the slope angle. [1][2][3] It was formulated by Waldo Tobler. This function was estimated from empirical data of Eduard Imhof.
Pace [6] in minutes per kilometre or mile vs. slope angle resulting from Naismith's rule [7] for basal speeds of 5 and 4 km / h. [n 1] The original Naismith's rule from 1892 says that one should allow one hour per three miles on the map and an additional hour per 2000 feet of ascent. [1] [4] It is included in the last sentence of his report ...
The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line refers to the tangent of the angle of that surface to the horizontal. It is a special case of the slope, where zero indicates horizontality. A larger number indicates higher or steeper degree of "tilt ...
Tape correction (surveying) In surveying, tape correction (s) refer (s) to correcting measurements for the effect of slope angle, expansion or contraction due to temperature, and the tape's sag, which varies with the applied tension.
Strike and dip. In geology, strike and dip is a measurement convention used to describe the plane orientation or attitude of a planar geologic feature. A feature's strike is the azimuth of an imagined horizontal line across the plane, and its dip is the angle of inclination (or depression angle) measured downward from horizontal. [1]
A useful formula pilots use to calculate descent rates (for the standard 3° glide slope): Rate of descent = (ground speed ⁄ 2) × 10. or Rate of descent = ground speed × 5. For other glideslope angles: Rate of descent = glide slope angle × ground speed × 100 / 60, where rate of descent is in feet per minute, and ground speed is in knots.
An approach slope is the path that an aircraft follows on its final approach to land on a runway. It is ideally a gentle downward slope. A commonly used approach slope is 3° from the horizontal. However, some airports have a steeper approach slope because of topography, buildings, or other considerations.
Q-slope. The Q-slope method for rock slope engineering and rock mass classification is developed by Barton and Bar. [1][2][3] It expresses the quality of the rock mass for slope stability using the Q-slope value, from which long-term stable, reinforcement-free slope angles can be derived. The Q-slope value can be determined with:
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