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Geohash is a public domain geocode system invented in 2008 by Gustavo Niemeyer [2] which encodes a geographic location into a short string of letters and digits. Similar ideas were introduced by G.M. Morton in 1966. [3]
TIGER logo. Topologically Integrated Geographic Encoding and Referencing, or TIGER, or TIGER/Line is a format used by the United States Census Bureau to describe physical and cultural features such as roads, highways, city limits, rivers, and lakes, as well as areas such as census tracts.
See geocode system types below (of names and of grids). Hierarchy: geocode's syntax hierarchy corresponding to the spatial hierarchy of its represented entities. A geocode system can hierarchical (name or grid) or non-hierarchical. Covering: global or partial. The entities (represented by the geocodes) are in all globe (e. g. geographical ...
The column letters use a more restricted alphabet, going from A to Z but omitting D, E, I, M, N, O, V, W; the columns are arranged so that the rightmost column in grid zone A and Y has column letter Z, and the next column in grid zone B or Z starts over with column letter A. The row letters go from A to Z, omitting I and O.
Plus Codes logo. The Open Location Code (OLC) is a geocode based on a system of regular grids for identifying an area anywhere on the Earth. [1] It was developed at Google's Zürich engineering office, [2] and released late October 2014. [3]
Address geocoding, or simply geocoding, is the process of taking a text-based description of a location, such as an address or the name of a place, and returning geographic coordinates, frequently latitude/longitude pair, to identify a location on the Earth's surface. [1]
The chosen coding uses alternating pairs of letters and digits, like so: BL11BH16; In each pair, the first character encodes longitude and the second character encodes latitude. [5] These character pairs also have traditional names, and in the case of letters, the range of characters (or "encoding base number") used in each pair does vary.
Worldwide Geographic Location Codes (GLCs) list the number and letter codes federal agencies should use in designating geographic locations anywhere in the United States or abroad in computer programs.