azimuthal
Around the compass
Azimuthal describes something relating to or measured by azimuth—the horizontal angle from a reference direction, usually north.
In navigation and astronomy, azimuthal readings help locate objects relative to the observer.
An azimuthal map projection preserves direction from a central point, making it useful for plotting shortest routes: The azimuthal projection centered on the North Pole shows why polar flights save time.
Device showing cardinal directions
- bearingPosture or orientation
- headingDirectional course traveled
- coursePlanned path forward
- sextantMaritime angular measurement device
quadrant · astrolabe · chart · waypoint · seafaring · pilotage · wayfinding · mariner
Cylindrical cartographic projection
- RobinsonCommon English surname
- stereographicAngle-preserving projection type
- LambertFranco-Germanic hereditary name
- conformalMaintains angles locally
equidistant · orthographic · polar · cylindrical · conic · planisphere · mapmaking · cartography
Point straight overhead
- horizonApparent earth-sky meeting
- celestialOf the sky above
- altitudeMeasured height above reference
- declinationAngular distance from equator
meridian · ecliptic · equator · sidereal · star chart · telescope · observatory · celestial sphere
compass
Device showing cardinal directions
sextant · quadrant · astrolabe · chart · waypoint · seafaring · pilotage · wayfinding · mariner · longitude
Mercator
Cylindrical cartographic projection
- RobinsonCommon English surname
- stereographicAngle-preserving projection type
- LambertFranco-Germanic hereditary name
conformal · equidistant · orthographic · polar · cylindrical · conic · planisphere · mapmaking · cartography · geodesy
zenith
Point straight overhead
declination · meridian · ecliptic · equator · sidereal · star chart · telescope · observatory · celestial sphere · zenithal
angle
Geometric measure of rotation
sweep · arc · circumference · tangential · sector · circular · radius · diameter · degree · coordinate
azimuthalzenithal
Relating to directly overhead
polar · vertical · radial · meridional · latitudinal