qmk_firmware/keyboards/handwired/concertina/64key/info.json

{
    "keyboard_name": "Concertina",
    "url": "https://viktor.eikman.se/article/the-concertina/",
    "maintainer": "veikman",
    "width": 12,
    "height": 8,
    "layouts": {
        "LAYOUT_64key": {
            "key_count": 64,
            "layout": [
                {"x":2, "y":0.5}, {"x":3, "y":0}, {"x":4, "y":0.3},
                {"x":8, "y":0.7}, {"x":9, "y":0.3}, {"x":10, "y":0},

                {"x":2, "y":1.5}, {"x":3, "y":1}, {"x":4, "y":1.3}, {"x":5, "y":0.7},
                {"x":8, "y":0.7}, {"x":9, "y":1.3}, {"x":10, "y":1}, {"x":11, "y":1.5},

                {"x":3, "y":2}, {"x":4, "y":2.3}, {"x":5, "y":1.7},
                {"x":8, "y":1.7}, {"x":9, "y":2.3}, {"x":10, "y":2},

                {"x":2, "y":4}, {"x":3, "y":4}, {"x":4, "y":4}, {"x":5, "y":4},
                {"x":8, "y":4}, {"x":9, "y":4}, {"x":10, "y":4}, {"x":11, "y":4},

                {"x":0, "y":5}, {"x":1, "y":5}, {"x":2, "y":5}, {"x":3, "y":5}, {"x":4, "y":5}, {"x":5, "y":5},
                {"x":8, "y":5}, {"x":9, "y":5}, {"x":10, "y":5}, {"x":11, "y":5}, {"x":12, "y":5}, {"x":13, "y":5},

                {"x":0, "y":6}, {"x":1, "y":6}, {"x":2, "y":6}, {"x":3, "y":6}, {"x":4, "y":6}, {"x":5, "y":6},
                {"x":8, "y":6}, {"x":9, "y":6}, {"x":10, "y":6}, {"x":11, "y":6}, {"x":12, "y":6}, {"x":13, "y":6},

                {"x":0, "y":7}, {"x":1, "y":7}, {"x":2, "y":7}, {"x":3, "y":7}, {"x":4, "y":7},
                {"x":9, "y":7}, {"x":10, "y":7}, {"x":11, "y":7}, {"x":12, "y":7}, {"x":13, "y":7},

                {"x":3, "y":8},
                {"x":10, "y":8}
            ]
        }
    }
}