Layer Estimates:

Layer: BLMMonumentsAndNCAs_2017 (ID:0)
Count: 17
Extent:

XMin: -12701238.5052037
YMin: 4438598.79260095
XMax: -12186581.5355861
YMax: 4605677.64028942
Spatial Reference: 102100 (3857)

Layer: BLMMonumentsAndNCAs_2016 (ID:1)
Count: 10
Extent:

XMin: -12696270.074241
YMin: 4439129.79646235
XMax: -12183805.1879832
YMax: 4645835.32951868
Spatial Reference: 102100 (3857)