2011

Table Of Contents
flood trace For a network topology (page 2069), a trace that begins at a specified
point and traces out in all directions for a specified distance or resistance.
forced-update field A type of auto-generated field (metadata) (page 2056) in the
Metadata feature, the value of which is required to be derived from the data
source within a GIS resource (metadata) (page 2072), according to the rules of
the
FGDC CSDGM Standard (page 2063). Forced-update fields are updated each
time metadata is updated.
generalization A method of reducing the number of vertices in the source
data by a specific percentage.
geodetic coordinate system A coordinate system that is referenced directly
to a datum. Compare with
cartographic coordinate system (page 2057).
geographic analysis Analytical techniques that identify existing conditions
of a geographic location, a spatial area, or a linear network, and predict the
effects of certain future events on these features.
geographic data Information about geographic features. See feature (page
2063).
geoid An ellipsoid with a highly irregular surface used to describe the shape
of the earth. See also
ellipsoid (page 2062).
geometry (Oracle Spatial database) The representation of a spatial
feature
(page 2063), modeled as an ordered set of primitive elements. See element (Oracle
Spatial database)
(page 2062).
geometry mapping The process of transforming the geometry elements of
AutoCAD Map 3D objects to Oracle Spatial geometry, and transforming the
geometry elements of the records back to AutoCAD Map 3D objects.
georeferenced DWF A DWF file published by AutoCAD Map 3D or AutoCAD
Civil 3D 2008 that contains a global coordinate system and defined latitude
and longitude coordinates based on the WGS84 datum. See also
DWF (page
2061),
Autodesk Design Review (page 2056).
georeferenced image An image that references real-world coordinates in its
correlation source. Example: Georeferenced images include GeoSPOT, GeoTIFF,
and images that use world files as their correlation source.
GeoTIFF A type of tagged image file format (TIFF) that supports georeferencing
information.
GIS (Geographic Information System) A computerized decision support
system that integrates geographic data, attribute data, and other spatially
2064 | Glossary