Layer Estimates:

Layer: PittsburghSeriousViolentCrimesSummerTracts (ID:0)
Count: 137
Extent:

XMin: -8916350.27575268
YMin: 4918098.93096903
XMax: -8890294.24773879
YMax: 4939419.79964269
Spatial Reference: 102100 (3857)

Layer: PittsburghSeriousViolentCrimesSummerTop4B (ID:1)
Count: 912
Extent:

XMin: -8914775.77122244
YMin: 4921325.55682803
XMax: -8890547.27046787
YMax: 4938516.21068843
Spatial Reference: 102100 (3857)

Layer: PghTracts (ID:2)
Count: 137
Extent:

XMin: -8916350.27575268
YMin: 4918098.93096903
XMax: -8890294.24773879
YMax: 4939419.79964269
Spatial Reference: 102100 (3857)