Layer Estimates:

Layer: All NWIS Carbonate Springs including karst geology data (ID:0)
Count: 17061
Extent:

XMin: -18467305.9818414
YMin: 2039105.18820219
XMax: -7376573.87906397
YMax: 10948287.5368198
Spatial Reference: 102100 (3857)

Layer: All NWIS Carbonate Springs (including within 1000 ft of carbonate) (ID:1)
Count: 18793
Extent:

XMin: -18467305.9818414
YMin: 2039105.18820219
XMax: -7376573.87906397
YMax: 10948287.5368198
Spatial Reference: 102100 (3857)

Layer: UrbanCarbonateSprings (ID:14)
Count: 7710
Extent:

XMin: -13591652.1803001
YMin: 2039105.18820219
XMax: -7376573.87906397
YMax: 5881832.82251584
Spatial Reference: 102100 (3857)

Layer: UrbanSpringsWithin1000ftCarbonate (ID:15)
Count: 669
Extent:

XMin: -17585513.5042967
YMin: 2042486.9153995
XMax: -7391599.10488236
YMax: 5876295.86712098
Spatial Reference: 102100 (3857)

Layer: RuralCarbonateSprings (ID:16)
Count: 9349
Extent:

XMin: -18467305.9818414
YMin: 2047006.99753421
XMax: -7421968.12841149
YMax: 10948287.5368198
Spatial Reference: 102100 (3857)

Layer: RuralSpringsWithin1000ftCarbonate (ID:17)
Count: 1062
Extent:

XMin: -18354344.0610171
YMin: 3427218.2764905
XMax: -8153082.28577966
YMax: 10913668.3993701
Spatial Reference: 102100 (3857)

Layer: USCarbonateGeologyfromKarstMap (ID:18)
Count: 89369
Extent:

XMin: -19089517.5737858
YMin: 2000445.442689
XMax: 19300100.7478052
YMax: 10966942.1869822
Spatial Reference: 102100 (3857)