Pitch

The pitches in the games in the Kick Off Series were stored on the floppies using a technique called tiling. Two files are used for each pitch: A bitmap which contains a number of 16 x 16 pixel tiles and a tilemap which holds indices into the bitmap. The size of the maps are 80 x 96 tiles and consequently the size of a full pitch is 1280 x 1536 pixels.

In open kick off it is nearly the same except that bitmap has been converted from IFF amiga format to PNG and tilemap has been converted from binary to a TMX file, which is a XML description of the tilemap used by TilED map editor.

TilED is a generic tile map editor for Windows/Linux/macOS that allows you to create tile layers as well as object layers, containing arbitrary shapes for trigger areas and other purposes.

Libgdx features a generic maps API including tiled maps and supports loading TMX/Tiled maps.