Layer Estimates:

Layer: Shipping_Lanes (ID:0)
Count: 328
Extent:

XMin: -20037507.0672
YMin: 1046184.6732
XMax: 20037507.0672
YMax: 10033675.1444
Spatial Reference: 102100 (3857)

Layer: Anchorage_Areas (ID:1)
Count: 914
Extent:

XMin: -19848936.9077
YMin: 655370.4144
XMax: 19967381.6183
YMax: 11482403.158
Spatial Reference: 102100 (3857)

Layer: US_Maritime_Limits (ID:2)
Count: 260
Extent:

XMin: -20037507.0672
YMin: -1985527.1677
XMax: 20037507.0672
YMax: 12808185.7698
Spatial Reference: 102100 (3857)