Alphanumeric grid
| a | b | c | d | e | f | |
|---|---|---|---|---|---|---|
| 1 | a1 | b1 | c1 | d1 | e1 | f1 |
| 2 | a2 | b2 | c2 | d2 | e2 | f2 |
| 3 | a3 | b3 | c3 | d3 | e3 | f3 |
| 4 | a4 | b4 | c4 | d4 | e4 | f4 |
| 5 | a5 | b5 | c5 | d5 | e5 | f5 |
| 6 | a6 | b6 | c6 | d6 | e6 | f6 |
AnAlpha numeric grid(also known asatlas grid[1]) is a simplecoordinate systemon agridin which each cell is identified by a combination of a letter and a number.[2]
An advantage over numeric coordinates such aseasting and northing,which use two numbers instead of a number and a letter to refer to a grid cell, is that there can be no confusion over which coordinate refers to which direction. As an easy example, one could think aboutbattleship;simply match the number at the top to the number on the bottom, then follow the two lines until they meet in a spot.
Algebraic chess notationuses an Alpha numeric grid to refer to the squares of achessboard.[3]
Some kinds ofgeocodealso use letters and numbers, typically several of each in order to specify many more locations over much larger regions.
References
[edit]- ^"Atlas grid".encyclopedia2.thefreedictionary.Retrieved2010-03-22.
- ^"Archived copy".Archived fromthe originalon 2007-10-10.Retrieved2010-03-22.
{{cite web}}:CS1 maint: archived copy as title (link)Retrieved 2010-03-22. - ^http:// fide /fide/handbook?id=125&view=articleAppendicesinWorld Chess FederationHandbook: see partC.7of sectionC. Algebraic notation.Retrieved 2010-03-22.