The length of a degree of arc of latitude is approximately 111 km (69 miles), varying, because of the nonuniformity of Earth's curvature, from 110.567 km (68.706 miles) at the Equator to 111.699 km (69.41 miles) at the poles.
A nautical mile was originally defined as the length on the Earth's surface of one minute (1/60 of a degree) of arc along a meridian (north-south line of longitude).
Mouton used Riccioli's estimate that one degree of arc was 321,185 Bolognese feet, and his own experiments showed that a pendulum of length one virgula would beat 3959.2 times in half an hour.
The catalogued units are ::minute, hour, day, degree of arc, minute of arc, second of arc, hectare, litre, tonne, and astronomical unit Non-SI units whose values in SI units must be obtained experimentally (Table 7).
Because these ratios are approximately the same, the Sun and the Moon as seen from Earth appear to be approximately the same size: about 0.5 degree of arc in angular measure.
The optical resolution was 3,900 × 3,072 pixels, resulting in ∼15 21 pixels per degree of arc.
The inclination, or tilt, of a planet's orbit is measured in degrees of arc from the plane of Earth's orbit, called the ecliptic.
Between one Hulcher frame and the next, Woods's driver travelled through roughly two hundred degrees of arc, which means that a ball sitting unthreatened on the tee in one frame would be long gone by the next.
The angle VSN, in degrees of arc, is the longitude of the ascending node, i.e., of the point where the moving planet passes north of the plane of Earth's orbit.
The visual angle is the angle a viewed object subtends at the eye, usually stated in degrees of arc [20].
