{
 "id": 21,
 "extent": {
  "xmin": 311344,
  "ymin": 665493.99980000034,
  "xmax": 332731.5,
  "ymax": 678666.50980000012,
  "spatialReference": {
   "wkid": 27700,
   "latestWkid": 27700,
   "xyTolerance": 0.001,
   "zTolerance": 2,
   "mTolerance": 0.001,
   "falseX": -5220400,
   "falseY": -15524400,
   "xyUnits": 450481592.767096639,
   "falseZ": 0,
   "zUnits": 1,
   "falseM": -100000,
   "mUnits": 10000
  }
 }
}