compass, prime meridian, meridian, sextant, ecliptic, deg, datum, sidereal, magnetic compass, ushant, celestial equator, centroid, geoid, azimuth, decimal, puppis, magnetic pole, equator, altimetry, radians, rhumb line, ephemeris, galactic equator, aphelion, global positioning system, capricornus, greenwich mean time, magnetic declination, bathymetry, lagrangian, phonetic alphabet, philae, abeam, geostationary orbit, celestial pole, achernar, parallax, ouessant, austral islands, maps, arafura sea, cartesian coordinates, geosynchronous, celestial sphere, equatorial, orbital, centerlines, geophone, syrtis major, theodolite, cape verde islands, odometry, synoptic, kilometers, horoscope, heliopause, algol, barometric pressure, constellations, kuroshio current, northing, geodetic, groundspeed, isobars, millibar, obliquity, celestial navigation, perihelion, charley, radiosonde, morse code, arcsecond, geomagnetism, hydrographic, kerguelen, cosine, umbra, dropsonde, hypotenuse, novaya zemlya, lesser antilles, moonrise, richter scale, moonset, sandwich islands, qibla, sunspot, protractor, hubble, ophiuchus, trig, monoceros, geosynchronous orbit, axis, proxima centauri, beaufort scale, makalu, isotherms, libration, geographic, geostationary, nautical mile, longitudes, latitude, declination, altitude, frequency, height, latitudes, width, coincide, direction, i.e., value, ap, elevation, pitch, thickness, azimuths, depth, number, equidistant, isometric, km, stereographic, corresponding, crosshatched, pixel, 4-2, contour, dotted, equipotential, latitudinal, overview, rotated, vertical, arrhenius, axial, azimuthal

dateline, date line, international date line, magnetic meridian, observer's meridian, prime meridian

geographical zone, global positioning system, gps, greenwich, longitudinal, longitudinally, map projection, meridian, prime meridian, time zone, zone

great circle

line of longitude, meridian