GIS Dictionary

[ESRI software] In ArcMap, a user-created reference to a time and date stamp. Historical markers can be used to easily […]

[ESRI software] In ArcMap, a version that a user connects to by using a historical marker or indicating a particular

[ESRI software] A model created, dated, and saved when the application is closed to document the tools and parameter values

[non-ESRI software] HKEY_CLASSES_ROOT registry hive. A Windows registry root key that points to the HKEY_LOCAL_MACHINE\Software\Classes registry key. It displays essential

[data quality] A small gap in a raster line feature, usually considered to be an error caused by the poor

[network analysis] In network datasets, a type of junction connectivity policy in which junctions connect to other junctions based on

1 [navigation] The apparent or visible junction of land and sky. 2 [astronomy] The horizontal plane tangent to the earth’s

The circle containing all points equidistant from the center of an azimuthal projection.

[navigation] The angle formed by the intersection of two lines in a horizontal plane.

A network of known horizontal geographic positions, referenced to geographic parallels and meridians or to other lines of orientation such

[geodesy] A geodetic datum for any extensive measurement system of positions, usually expressed as latitude-longitude coordinates, on the earth’s surface.