GIS Dictionary

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Z- Ze Zi Zo

zenith

[astronomy] In astronomy, the point on the celestial sphere directly above an observer. Both the zenith and nadir lie on the observer’s meridian; the zenith lies 180 degrees from the … Read more

zenith angle

[ESRI software] In Survey Analyst for field measurements, a vertical angle that is formed by the intersection of two lines in a vertical plane. Zenith angles are observed on the … Read more

zero length line event

[linear referencing] In linear referencing, a line event whose from-measure is equal to its to-measure. A zero length line even may occur, for example, along routes, when a polygon touches … Read more