Sections
| Section | Abbreviation | Name |
| 0 | IS | INDICATOR SECTION |
| 1 | IDS | IDENTIFICATION SECTION |
| 2 | LOC | LOCAL USE SECTION |
| 3 | GDS | GRID DEFINITION SECTION |
| 4 | PDS | PRODUCT DEFINITION SECTION |
| 5 | DRS | DATA REPRESENTATION SECTION |
| 6 | BITMAP | BIT-MAP SECTION |
| 7 | DATA | DATA SECTION |
| 8 | END | END SECTION |