porymap/resources/text/region_map_default_emerald.json

{
    "region_maps": [
        {
            "alias": "hoenn",
            "tilemap": {
                "width": 64,
                "height": 64,
                "format": "plain",
                "tileset_path": "graphics/pokenav/region_map/map.png",
                "tilemap_path": "graphics/pokenav/region_map/map.bin"
            },
            "layout": {
                "width": 28,
                "height": 15,
                "offset_left": 1,
                "offset_top": 2,
                "format": "C array",
                "path": "src/data/region_map/region_map_layout.h"
            }
        },
        {
            "alias": "pokedex area screen",
            "tilemap": {
                "width": 32,
                "height": 32,
                "format": "8bpp",
                "tileset_path": "graphics/pokedex/region_map.png",
                "tilemap_path": "graphics/pokedex/region_map.bin"
            },
            "layout": null
        }
    ]
}