Layer Estimates:

Layer: Ditch Centerlines (ID:0)
Count: 211
Extent:

XMin: -7658644.0284
YMin: 5598906.6049
XMax: -7641756.1862
YMax: 5606685.8236
Spatial Reference: 102100 (3857)

Layer: Mapbook Index (ID:1)
Count: 20
Extent:

XMin: -7658749.2589
YMin: 5598376.171
XMax: -7641105.7107
YMax: 5607032.6711
Spatial Reference: 102100 (3857)