Geocode: Difference between revisions

Revision as of 09:26, 6 September 2023

Revision as of 00:20, 12 September 2023

Line 37:

The set of all geocodes used as unique identifiers of the cells of a [[Tessellation#Voronoi tilings|full-coverage]] of the [[Terrain|geographic surface]] (or any well-defined area like a country or the oceans), is a '''geocode system''' (also named ''geocode scheme''). The [[Syntax (programming languages)|syntax]] and [[Semantics (computer science)|semantic]] of the geocodes are also components of the system definition:

* geocode '''syntax''': the characters that can be used, blocks of characters and its size and order. Example: country codes use two letters of the alphabet (chacacter set A-Z). The most commomcommon way to describe formally is by [[regular expression]] (e.g. <code>/[A-Z]{2,2}/</code>).

* geocode '''semantic''': the meaning of the geocode, usually expressed by associating the code with a geographical entity type. Can be described formally is by an [[Ontology (information science)|ontology]], an [[UML class diagram]] or any [[Entity-relationship model]]. <br />In general the semantic can be deduced by its formation or encoding/decoding process. Example: each Geohash code can be expressed by a rectangular area in the map, and the rectangle coordinates is obtained by its decoding process.