{
  "name": "step",
  "description": "Resolution (step) of the image in the output referential. Unit must respect the srs definition.",
  "fields": [
    {
      "name": "unit",
      "type": "string",
      "description": "Unit of the step"
    },
    {
      "name": "x",
      "type": "double"
    },
    {
      "name": "y",
      "type": "double"
    }
  ]
}