**Grid maps** are identified by eastings and southings using a partly alphabetic scale (to differentiate them from island references)

Each grid map is 11 island-units across by 11 island-units down.

- Grid 3x:4x, for example, contains islands in the square from 30:40 to 39:49, and the island at 05:50 would be on Grid map 0x:5x.

0x | 1x | 2x | 3x | 4x | 5x | 6x | 7x | 8x | 9x | 10x | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|

0x | 0x:0x | 1x:0x | 2x:0x | 3x:0x | 4x:0x | 5x:0x | 6x:0x | 7x:0x | 8x:0x | 9x:0x | 10x:0x | 0x |

1x | 0x:1x | 1x:1x | 2x:1x | 3x:1x | 4x:1x | 5x:1x | 6x:1x | 7x:1x | 8x:1x | 9x:1x | 10x:1x | 1x |

2x | 0x:2x | 1x:2x | 2x:2x | 3x:2x | 4x:2x | 5x:2x | 6x:2x | 7x:2x | 8x:2x | 9x:2x | 10x:2x | 2x |

3x | 0x:3x | 1x:3x | 2x:3x | 3x:3x | 4x:3x | 5x:3x | 6x:3x | 7x:3x | 8x:3x | 9x:3x | 10x:3x | 3x |

4x | 0x:4x | 1x:4x | 2x:4x | 3x:4x | 4x:4x | 5x:4x | 6x:4x | 7x:4x | 8x:4x | 9x:4x | 10x:4x | 4x |

5x | 0x:5x | 1x:5x | 2x:5x | 3x:5x | 4x:5x | 5x:5x | 6x:5x | 7x:5x | 8x:5x | 9x:5x | 10x:5x | 5x |

6x | 0x:6x | 1x:6x | 2x:6x | 3x:6x | 4x:6x | 5x:6x | 6x:6x | 7x:6x | 8x:6x | 9x:6x | 10x:6x | 6x |

7x | 0x:7x | 1x:7x | 2x:7x | 3x:7x | 4x:7x | 5x:7x | 6x:7x | 7x:7x | 8x:7x | 9x:7x | 10x:7x | 7x |

8x | 0x:8x | 1x:8x | 2x:8x | 3x:8x | 4x:8x | 5x:8x | 6x:8x | 7x:8x | 8x:8x | 9x:8x | 10x:8x | 8x |

9x | 0x:9x | 1x:9x | 2x:9x | 3x:9x | 4x:9x | 5x:9x | 6x:9x | 7x:9x | 8x:9x | 9x:9x | 10x:9x | 9x |

10x | 0x:10x | 1x:10x | 2x:10x | 3x:10x | 4x:10x | 5x:10x | 6x:10x | 7x:10x | 8x:10x | 9x:10x | 10x:10x | 10x |

0x | 1x | 2x | 3x | 4x | 5x | 6x | 7x | 8x | 9x | 10x |

It might be noted that this map is rotated 45 degrees counterclockwise from the Ikariam world map.