In compound time, the second number of the ratio will either be a three, a six or a nine. The first number of the ratio follows the same rules as in simple time. The only exception is the 2:3 ratio where two notes fall within the space of three. (Select Compound Time Tuplets.)
The Laplace azimuth (geodetic azimuth) of a point in space is equal to the dihedral angle between the plane of the geodetic meridian of the place of observation and the plane that passes through the normal to the surface of the reference ellipsoid at this place and the observed point.aplace Azimuth. the geodetic azimuth A of the direction to an observed point obtained from its astronomical azimuth a corrected by taking into account the effect of the deviation of the vertical at the place of observation.
The North American Datum of 1983 (NAD 83) is the horizontal control datum for the United States, Canada, Mexico, and Central America, based on a geocentric origin and the Geodetic Reference System 1980.This datum, NAD 83, is the current geodetic reference system.he North American Datum of 1927 (NAD 27) is The horizontal control datum for the United States that (was) defined by (a) location and azimuth on the Clarke spheroid of 1866, with origin at (the survey station) Meades Ranch. ... The geoidal height at Meades Ranch (was) assumed to be zero.