In c-squares notation, each cell of the grid has a unique identifier, incorporating the identity of its parent (10×10 degree) cell, and further divisible into 1-degree, 0.5-degree, 0.1-degree cells, etc., as fine as may be desired. History The northern hemisphere covered by a 5×5 degree, equal angle, latitude-longitude grid. C-squares codes and associated published software are free to use and the software is released under version 2 of the GNU General Public License (GPL), a licence of the Free Software Foundation. Dataset extents expressed in c-squares notation can be visualised using a web-based utility, the c-squares mapper, an online instance of which is currently provided by CSIRO Oceans and Atmosphere in Australia. The system was initially designed to represent data "footprints" or spatial extents in a more flexible manner than a standard minimum bounding rectangle, and to support "lightweight", text-based spatial querying it can also provide a set of identifiers for grid cells used for assembly, storage and analysis of spatially organised data, in a unified notation that transcends national or jurisdictional boundaries. Individual cell identifiers incorporate literal values of latitude and longitude in an interleaved notation (producing grid resolutions of 10, 1, 0.1 degrees, etc.), together with additional digits that support intermediate grid resolutions of 5, 0.5, 0.05 degrees, etc. 14 (0.05 degree squares) (counts include separator character/s)Ĭ-squares (acronym for the Concise Spatial QUery And REpresentation System) is a system of spatially unique, location-based identifiers ( geocodes) for areas on the surface of the earth, represented as cells from a latitude- and longitude-based Discrete Global Grid at a hierarchical set of resolution steps, obtained by progressively subdividing 10×10 degree World Meteorological Organization squares the term "c-square" is also available for use to designate any component cell of the grid. Standard for representing locations on Earth's surface in databases C-squaresĬoncise spatial query and representation system
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