Layer Estimates:

Layer: Potomac_WeatherEvents (ID:0)
Count: 11033
Extent:

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YMin: 37.9800000000999
XMax: -76.3699999998001
YMax: 40.19160000004
Spatial Reference: 4269 (4269)

Layer: ICPRB_WQData2017 (ID:1)
Count: 9272
Extent:

XMin: -79.6486109996978
YMin: 37.8797499995629
XMax: -76.2569810003728
YMax: 40.1691000002648
Spatial Reference: 4269 (4269)

Layer: PotentialContaminationSources (ID:2)
Count: 2031
Extent:

XMin: -79.5847702032822
YMin: 37.991672515874
XMax: -76.9938659669408
YMax: 40.0123100282852
Spatial Reference: 4269 (4269)

Layer: DC_Intakes_Watershed (ID:3)
Count: 2
Extent:

XMin: -77.2461719450791
YMin: 38.9515836283818
XMax: -77.1273358590626
YMax: 39.0020255137665
Spatial Reference: 4269 (4269)

Layer: Tributaries_Watershed (ID:4)
Count: 12506
Extent:

XMin: -79.6803844001199
YMin: 37.8679620998711
XMax: -76.2366334002112
YMax: 40.2342694002127
Spatial Reference: 4269 (4269)

Layer: Watershed (ID:5)
Count: 1
Extent:

XMin: -79.6909866336262
YMin: 37.8684921261108
XMax: -76.2391967774093
YMax: 40.2259979243648
Spatial Reference: 4269 (4269)

Layer: County_Watershed (ID:6)
Count: 106
Extent:

XMin: -79.6909866336262
YMin: 37.8684921261108
XMax: -76.2391967774093
YMax: 40.2259979243648
Spatial Reference: 4269 (4269)

Layer: LandUseSegments (ID:7)
Count: 44
Extent:

XMin: -79.6996338590519
YMin: 37.8815945044934
XMax: -76.8842562179341
YMax: 40.2385347582946
Spatial Reference: 4269 (4269)

Layer: NitrogenLoading (ID:8)
Count: 44
Extent:

XMin: -79.6996338590519
YMin: 37.8815945044934
XMax: -76.8842562179341
YMax: 40.2385347582946
Spatial Reference: 4269 (4269)

Layer: SulfurLoading (ID:9)
Count: 44
Extent:

XMin: -79.6996338590519
YMin: 37.8815945044934
XMax: -76.8842562179341
YMax: 40.2385347582946
Spatial Reference: 4269 (4269)

Layer: PhosphorousLoading (ID:10)
Count: 44
Extent:

XMin: -79.6996338590519
YMin: 37.8815945044934
XMax: -76.8842562179341
YMax: 40.2385347582946
Spatial Reference: 4269 (4269)

Layer: Potomac_River (ID:11)
Count: 1
Extent:

XMin: -77.7540586000243
YMin: 37.8896974519759
XMax: -76.2365573112709
YMax: 39.3363890995774
Spatial Reference: 4269 (4269)

Layer: State_Watershed (ID:12)
Count: 6
Extent:

XMin: -83.6751708981184
YMin: 36.5402984617047
XMax: -74.697189330723
YMax: 42.2678833005739
Spatial Reference: 4269 (4269)

Layer: PopulatedPlaces_Watershed (ID:13)
Count: 351
Extent:

XMin: -79.5874613993241
YMin: 37.9789817400153
XMax: -76.4229683964743
YMax: 39.960296742201
Spatial Reference: 4269 (4269)

Layer: Reservoirs_Watershed (ID:14)
Count: 4
Extent:

XMin: -77.0961495000993
YMin: 38.9097029003686
XMax: -77.0134321003112
YMax: 38.9274884003694
Spatial Reference: 4269 (4269)