Layer Estimates:

Layer: Historic_LACoFD_600grid (ID:0)
Count: 91
Extent:

XMin: 6304944.11538564
YMin: 1697878.7265669
XMax: 6664527.01662523
YMax: 2094634.22537714
Spatial Reference: 102645 (2229)

Layer: Historic_LACoFD_500grid (ID:1)
Count: 255
Extent:

XMin: 6270666.50480713
YMin: 1809581.2137914
XMax: 6671638.23763897
YMax: 2124766.37639882
Spatial Reference: 102645 (2229)