Layer Estimates:

Layer: Legend (ID:0)
Count: 966
Extent:

XMin: -9634174.27377146
YMin: 2822518.67919277
XMax: 9215398.14177153
YMax: 3606536.81124405
Spatial Reference: 102100 (3857)

Layer: mappings.csv (ID:4)
Count: 1204