The Natural Area Code (or Universal Address) is a proprietary geocode system for identifying an area anywhere on the Earth, or a volume of space anywhere around the Earth. A Geocode ( G eospatial E ntity O bject Code) is representation format of a geospatial coordinate measurement used to provide a standard representation EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 The use of thirty alphanumeric characters instead of only ten digits makes a NAC shorter than its numerical latitude/longitude equivalent. Latitude, usually denoted symbolically by the Greek letter phi ( Φ) gives the location of a place on Earth (or other planetary body north or south of the Longitude (ˈlɒndʒɪˌtjuːd or ˈlɒŋgɪˌtjuːd symbolized by the Greek character Lambda (λ is the east-west Geographic coordinate measurement
Two-dimensional system
Instead of numerical longitudes and latitudes, a grid with 30 rows and 30 columns - each cell denoted by the numbers 0-9 and the twenty consonants of the Latin alphabet - is laid over the flattened globe. A NAC cell (or block) can be subdivided repeatedly into smaller NAC grids to yield an arbitrarily small area, subject to the ±1 m limitations of the World Geodetic System (WGS) data of 1984. The World Geodetic System defines a reference frame for the earth for use in Geodesy and Navigation.
A NAC represents an area on the earth -- the longer the NAC, the smaller the area (and thereby, location) represented. An eight or ten character NAC can uniquely specify every building, house, or fixed object in the world. In Architecture, Construction, Engineering and real estate development the word building may refer to one of the following Any man-made House generally refers to a Shelter or Building that is a Dwelling or place for Habitation by Human beings. An eight-character NAC specifies an area no larger than 25 metres by 50 metres, while a ten-character NAC cell is no larger than 0. 8 metres by 1. 6 metres.
Using a base 30 positional numeral system, NAC uses an alternate method which excludes vowels and avoids potential confusion between "0" (zero) and "O" (capital "o"), and "1" (one) and "I" (capital "i"):
| Decimal | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Base 30 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | B | C | D | F | G | |||
| Decimal | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | |||
| Base 30 | H | J | K | L | M | N | P | Q | R | S | T | V | W | X | Z | |||
For example, the ten-character NAC for the centre of the city of Brussels is HBV6R RG77T. Base 30 or trigesimal is a positional numeral system using 30 as the Radix. Brussels (Bruxelles pronounced; Brussel pronounced) officially the Brussels Capital-Region, is
Extension to three dimensions
The full NAC system provides a third coordinate: altitude. This coordinate is the arctangent of the altitude, relative to the Earth's radius, and scaled so that the zero point (000. . . ) is at the centre of the Earth, the midpoint (H00. . . ) is the local radius of the geoid, i. e. the Earth's surface, and the endpoint (ZZZ. . . ) is at infinity.
For example, the three-dimensional NAC for the centre of Brussels, at ground level, is HBV6R RG77T H0000.
External links
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