GIS Dictionary

[geodesy] A geodetic datum for any extensive measurement system of heights on, above, or below the earth’s surface. Traditionally, a […]

[aerial photography] An aerial photograph taken with the camera lens pointed straight down.

[ESRI software] In ArcGIS, a parameter that offsets the z-origin from the surface of a vertical coordinate system. The vertical

1 [ESRI software] In ArcGIS, a way to see the contents of a selected item in the Catalog tree in

[software] In ArcGlobe and 3D Analyst, an additional window that allows a user to view 3D data in a scene

[3D analysis] The locations visible from one or more specified points or lines. Viewshed maps are useful for such applications

[Internet] A directory name, used in a URL, that corresponds to a real or actual directory on a Web server.

[ESRI software] The map page as seen in layout view in ArcMap.

[ESRI software] The current extent of a map document in ArcGIS. The virtual study area never has a boundary.

[computing] A logical table in a database that stores a pointer to the data rather than the data itself.

[ESRI software] A minimum and maximum value that a map scale must fall between in order for the map layers