A to Z GIS | Explore this related guide, featuring updated terms and graphics and developed in coordination with Esri’s GIS Dictionary team.
Learn more about A to Z GIS
GIS Dictionary
Browse dictionary
arcsecond
URL copiedShare URL
[astronomy]
A unit of angular measurement that is 1/3600 of a degree. There are 60 arcminutes in a degree and 60 arcseconds in an arcminute. Arcseconds of latitude remain nearly constant, while arcseconds of longitude decrease mathematically as one moves toward the earth's poles.
[mathematics]
The distance traversed on the earth's surface when traveling 1/3600th of a degree of latitude or longitude.