Listing of Glossary
The following is the listing of glossary which maybe useful to you. You may use our search form or click through the letters :
| National grid |
a spatial reference system usually adopted by legal or administrative procedures for use through a given country. Typically consists of a projection or a system of projection zones plus a geodetic datum and ellipsoid. |
| Network framework |
a measurement framework based on a set of distinct spatial objects (usually instances of linear objects like roads or rivers) that connect to form a network. |
| North American Datum |
an adjustment of geodetic measurements that provides the horizontal reference for North America. The 1927 Datum held Mead's Ranch, Kansas as a fixed point, while the 1983 Datum performed a simultaneous adjustment of all measurements. 1927 uses the Clarke's ellipsoid, while 1983 uses the 1980 Geodetic Reference System. The plural of a geodetic datum is 'datums', despite the Latin origins. |
| Node |
The point at which areas (lines, chains, strings) in a polygon network are joined. Nodes carry information about the topology of the polygons. |
| Normalization |
A conceptual database design task that involves applying data dependency to a data model to avoid data inconsistencies by prohibiting redundancy. |
