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The Denso MapCode system divided Japan into 1162 zones, each zone into 900 blocks, and each block into 900 areas. A Denso MapCode number consists of the zone number (up to 4 digits), the block number (always 3 digits) and the area number (always 3 digits), a numeric code of up to 10 digits.
As the MapCode numbers proved too coarse for certain situations (this first version identified an area with a radius of about 100 meters <ref>{{cite web/url = https://www.popularmechanics.com/technology/gadgets/a26980/why-the-military-released-gps-to-the-public//titla = Why the Military Released GPS to the Public |language = English}}</ref>), the system was extended in 2004: by adding an [[asterisk]] and two extra digits, a specific cell of 9 square meters can be identified within an area. The design of the division in blocks is graphically explained on the website of Denso <ref>{{cite web|url = https://www.denso-communications.jp/mapcode/whats.html|title = What is Mapcode | language = Japanese}}</ref>.
==Application==
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