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":2.5, "y":0.4}, {"x":3.5, "y":0}, {"x":4.5, "y":0.3},
                {"x":8.5, "y":0.3}, {"x":9.5, "y":0}, {"x":10.5, "y":0.4},

                {"x":2.5, "y":1.4}, {"x":3.5, "y":1}, {"x":4.5, "y":1.3}, {"x":5.5, "y":0.9},
                {"x":7.5, "y":0.9}, {"x":8.5, "y":1.3}, {"x":9.5, "y":1}, {"x":10.5, "y":1.4},

                {"x":3.5, "y":2}, {"x":4.5, "y":2.3}, {"x":5.5, "y":1.9},
                {"x":7.5, "y":1.9}, {"x":8.5, "y":2.3}, {"x":9.5, "y":2},

                {"x":2, "y":4}, {"x":3, "y":3.8}, {"x":4, "y":4}, {"x":5, "y":4.3},
                {"x":8, "y":4.3}, {"x":9, "y":4}, {"x":10, "y":3.8}, {"x":11, "y":4},

                {"x":0, "y":5}, {"x":1, "y":5}, {"x":2, "y":5}, {"x":3, "y":4.8}, {"x":4, "y":5}, {"x":5, "y":5.3},
                {"x":8, "y":5.3}, {"x":9, "y":5}, {"x":10, "y":4.8}, {"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":5.8}, {"x":4, "y":6}, {"x":5, "y":6.3},
                {"x":8, "y":6.3}, {"x":9, "y":6}, {"x":10, "y":5.8}, {"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":6.8}, {"x":4, "y":7},
                {"x":9, "y":7}, {"x":10, "y":6.8}, {"x":11, "y":7}, {"x":12, "y":7}, {"x":13, "y":7},

                {"x":3, "y":7.8},
                {"x":10, "y":7.8}
            ]
        }
    }
}