Difference between revisions of "Centicule"
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| − | + | Within the same [[2008|year]] as the publication of the [[Algorithm]] and the elucidation of the concept of the [[graticule]], demand for a significantly smaller areal unit for various purposes arose. Eventually‡ it was decided that a subdivision of the graticule unit into 100 pieces, ten to the side of a graticule (a.k.a. six minutes of arc) -- hence called '''centicule''' or '''decicule''' to refer to these ratios using SI prefixes (this article will use 'centicule' since it is more common). Although the [[w:wikt:en:-cule|wikt:en:-cule]] suffix is inherited from 'graticule', one could also consider as a back-formation that since the entity is designed to be smaller that it receives a diminutive. | |
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| + | == measures and statistics == | ||
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| + | Centicules are as tall as the polar circumference of the Earth divided by 3600, and like graticules vary in width from top to bottom and depending on their position between equator and poles. Centicules can be used to describe a location within a graticule, for example in the [[User:Aperfectring/Notification|Notification]] program. Some people keep track of which centicules they have visited while hashing, either within a particular graticule or relative to the corner/edge of any/all graticules visited. | ||
You can use the following website to visualize centicules: | You can use the following website to visualize centicules: | ||
http://output.jsbin.com/equvix/latest?lat=39&lng=-77 | http://output.jsbin.com/equvix/latest?lat=39&lng=-77 | ||
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| + | ‡[[user:aperfectring|APR]] and [[user:Robyn|Robyn]] are responsible for developing the concept for the notify program; the first draft divided the graticule eight parts to an edge before settling on the decimalised version to better fit the format coordinates are often presented in. | ||
[[category:definitions]] | [[category:definitions]] | ||
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| + | <!--A decicule is approximately one hundredth the area of a graticule, or more precisely the set of coordinates that has a common integer part and tenths digit for both the latitude and longitude. This follows the proposal set forth by Pinecone. | ||
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| + | A decihash of a decicule is the same as the geohash of the graticule of which it is a part, except differing in the tenths digit where it takes the tenth digit of the decicule. This follows Pinecone's basic philosophy, but makes it simpler based on Rspeer's comments.--> | ||
Revision as of 18:23, 19 June 2021
Within the same year as the publication of the Algorithm and the elucidation of the concept of the graticule, demand for a significantly smaller areal unit for various purposes arose. Eventually‡ it was decided that a subdivision of the graticule unit into 100 pieces, ten to the side of a graticule (a.k.a. six minutes of arc) -- hence called centicule or decicule to refer to these ratios using SI prefixes (this article will use 'centicule' since it is more common). Although the wikt:en:-cule suffix is inherited from 'graticule', one could also consider as a back-formation that since the entity is designed to be smaller that it receives a diminutive.
measures and statistics
Centicules are as tall as the polar circumference of the Earth divided by 3600, and like graticules vary in width from top to bottom and depending on their position between equator and poles. Centicules can be used to describe a location within a graticule, for example in the Notification program. Some people keep track of which centicules they have visited while hashing, either within a particular graticule or relative to the corner/edge of any/all graticules visited.
You can use the following website to visualize centicules:
http://output.jsbin.com/equvix/latest?lat=39&lng=-77
‡APR and Robyn are responsible for developing the concept for the notify program; the first draft divided the graticule eight parts to an edge before settling on the decimalised version to better fit the format coordinates are often presented in.
