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Open AccessArticle

Categorization and Conversions for Indexing Methods of Discrete Global Grid Systems

Department of Computer Science, University of Calgary, 2500 University Drive N.W., Calgary, AB T2N 1N4, Canada
PYXIS Innovation Inc., 13, Windsor Street, Kingston, ON K7M 4K4, Canada
Author to whom correspondence should be addressed.
Academic Editors: Liang Steve and Kainz Wolfgang
ISPRS Int. J. Geo-Inf. 2015, 4(1), 320-336;
Received: 29 October 2014 / Revised: 29 December 2014 / Accepted: 4 February 2015 / Published: 25 February 2015
(This article belongs to the Special Issue 20 Years of OGC: Open Geo-Data, Software, and Standards)
PDF [1156 KB, uploaded 25 February 2015]


Digital Earth frameworks provide a tool to receive, send and interact with large location-based datasets, organized usually according to Discrete Global Grid Systems (DGGS). In DGGS, an indexing method is used to assign a unique index to each cell of a global grid, and the datasets corresponding to these cells are retrieved or allocated using this unique index. There exist many methods to index cells of DGGS. Toward facility, interoperability and also defining a “standard” for DGGS, a conversion is needed to translate a dataset from one DGGS to another. In this paper, we first propose a categorization of indexing methods of DGGS and then define a general conversion method from one indexing to another. Several examples are presented to describe the method. View Full-Text
Keywords: Digital Earth; indexing method; hierarchy; space filling curves Digital Earth; indexing method; hierarchy; space filling curves
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Amiri, A.M.; Samavati, F.; Peterson, P. Categorization and Conversions for Indexing Methods of Discrete Global Grid Systems. ISPRS Int. J. Geo-Inf. 2015, 4, 320-336.

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