When exporting with super simple export, the IntGrid's "grid size" (i.e., the size of each tile in the IntGrid) is not present in the output anywhere. I also don't see any formal guarantee listed here that the IntGrid will fill the extent specified by
"x": 0,
"y": 0,
"width": 256,
"height": 256,
in the data.json (and would therefore let you recompute the grid size as $\mathrm{width} / \text{int grid cols} \times \mathrm{height} / \text{int grid rows}$).
When exporting with super simple export, the IntGrid's "grid size" (i.e., the size of each tile in the IntGrid) is not present in the output anywhere. I also don't see any formal guarantee listed here that the IntGrid will fill the extent specified by
in the$\mathrm{width} / \text{int grid cols} \times \mathrm{height} / \text{int grid rows}$ ).
data.json(and would therefore let you recompute the grid size as