On the Subject of Creating Coordinates
Coordinate creation causes confusion commonly.
Table 1: grid size formats
|Format||How to interpret|
|w×h||w is the width, h the height of the grid.|
|h by w||h is the height, w the width of the grid.|
|n*h||n is the total size of the grid, w = n ÷ h.|
|n : w||n is the total size of the grid, h = n ÷ w.|
Table 2: grid location formats
|[c,r]||Top-left is [0,0].||c r|
|Top-left is A1.|
|<r, c>||Top-left is <0, 0>.||r, c||Top-left is 1, 1.|
|(c,r)||Bottom-left is (0,0).||c-r|
|Bottom-left is A-1.|
|“r, c”||Bottom-left is “0, 0”.||r/c||Bottom-left is 1/1.|
|[x]||Traverse right then down; Top-left is .||xth||Traverse right then down; Top-left is 1st.|
|#x||Traverse right then up; Bottom-left is #1.||四十七||Traverse down then left; top-right is 一.|
Table 3: Chinese numerals
 Scanline order, also known as reading order, starts at the top-left, moves right across the row, and then continues likewise with each row from top to bottom.
 Cartesian order, also known as geometric order, starts at the bottom-left, moves right across the row, and then continues likewise with each row from bottom to top.
 Traditional Chinese reading order starts at the top-right, moves down the column, and then continues likewise with each column from right to left.