and using the angle between the two objects to determine the length of the triangle's side that represents the distance to the unknown object. Historically, people would use sextants to measure distances between any two points on the Earth's surface. When dealing with objects ...
Clinometer: Allows you to measure the vertical angle (steepness) of a slope; helpful for assessing avalanche hazards and the heights of objects. Global needle: This feature compensates for magnetic-field variances and allows a compass to work smoothly and accurately worldwide. Otherwise, a compass...
The hillshade formula requires this angle to be in units of radians. First, change the azimuth angle from its geographic unit (compass direction) to a mathematic unit (right angle). Next, convert the azimuth angle to radians. Change azimuth angle measure: (4) Azimuth_math = 360.0 - ...
Measure the relevant horizontal angles. Typically, horizontal angles are measured in degrees, from 0 to 360. An angle of 90 degrees would be a right angle, which is formed by two perpendicular lines. If an individual took the horizontal angle of his line of sight when looking straight north ...
The Porsche Design IWC Compass Watch, 1980s, with integrated magnetic compass under the watch. Having a compass implies, of course, that you knew ahead of time that you'd need to navigate in the absence of a marked trail. Getting lost, however, is by definition not something you do on ...
Ants, for instance, compute the homing vector by constantly integrating the number of steps they make in a given direction relative to the polarization pattern in the sky 3, 4. Bees on their outbound flights are thought to measure the distance flown in each direction by integrating visually ...
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which could then be used to determine latitude. They came with two basic parts — a graduated circle and an alidade, a sighting device or pointer used to measure angles. Planispheric astrolabes were a bit more complicated. They were also more idiosyncratic because their operation depended on ...
We first computed the directional information in an ensemble of cells during each 133-ms interval using Idir, the directional equivalent of Ipos, which was used to measure frame-specific momentary positional information in the discharge of place cells during rotation (Kelemen and Fenton, 2010, O...
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