Layer Estimates:

Layer: Campgrounds (ID:0)
Count: 7071
Extent:

XMin: -18376800.2441386
YMin: 2078827.33700524
XMax: -7208391.35413248
YMax: 10583048.3410246
Spatial Reference: 102100 (3857)

Layer: Trailheads (ID:1)
Count: 11986
Extent:

XMin: -19746524.6973441
YMin: 1513968.71160625
XMax: 16108774.1387565
YMax: 9975500.95219252
Spatial Reference: 102100 (3857)

Layer: Cabins (ID:2)
Count: 571
Extent:

XMin: -16696434.4438645
YMin: 3705819.41929035
XMax: -7918114.07998924
YMax: 8644220.62778639
Spatial Reference: 102100 (3857)

Layer: Shelters (ID:3)
Count: 30
Extent:

XMin: -18565103.8576303
YMin: 4656635.71579503
XMax: -8625549.24447612
YMax: 10419969.712481
Spatial Reference: 102100 (3857)

Layer: Picnic_Areas (ID:4)
Count: 3101
Extent:

XMin: -17416887.2355112
YMin: 2012436.56012673
XMax: -7193883.93094246
YMax: 10030606.4506761
Spatial Reference: 102100 (3857)

Layer: Headquarters (ID:5)
Count: 231
Extent:

XMin: -17475268.9186788
YMin: 2077325.22320058
XMax: -7320595.30369542
YMax: 9553346.41245034
Spatial Reference: 102100 (3857)

Layer: Visitor_Information_Centers (ID:6)
Count: 1063
Extent:

XMin: -19001897.1939791
YMin: -1605718.2254487
XMax: 16221522.7774988
YMax: 10489386.4891582
Spatial Reference: 102100 (3857)

Layer: Ranger_Stations (ID:7)
Count: 890
Extent:

XMin: -18887278.0175182
YMin: -1595342.3205207
XMax: -7205331.54294522
YMax: 10228603.0669858
Spatial Reference: 102100 (3857)