GIS Dictionary

z-axis

In a spherical coordinate system, the vertical line that runs parallel to the earth's rotation, passing through 90 ...

z-coordinate

The value for a given surface location that represents an attribute other than position. In an elevation or terrain model, ...

z-factor

A conversion factor used to adjust vertical and horizontal measurements into the same unit of measure. Specifically, the ...

z-score

A statistical measure of the spread of values from their mean, expressed in standard deviation units, where the z-score ...

z-tolerance

In raster-to-TIN conversion, the maximum allowed difference between the z-value of the input raster cell and the z-value ...

z-value

The value for a given surface location that represents an attribute other than position. In an elevation or ...

zenith

In astronomy, the point on the celestial sphere directly above an observer. Both the zenith and nadir lie on ...

ZIP Code

Acronym for zone improvement plan code. A five-digit code, developed by the U.S. Postal Service, that identifies the ...

zone

1 All cells in a raster with the same value, regardless of whether or not they are contiguous. 2 ...

zoning

The application of local government regulations that permit certain land uses within geographic areas under the governments jurisdiction. ...