Layer Estimates:

Layer: Cambridge_Locations (ID:0)
Count: 28
Extent:

XMin: -7916291.52672174
YMin: 5214438.91507348
XMax: -7913410.19458172
YMax: 5217255.10614886
Spatial Reference: 102100 (3857)

Layer: Cameras (ID:1)
Count: 65
Extent:

XMin: -7918453.91996422
YMin: 5214438.91507348
XMax: -7912537.17403552
YMax: 5223194.27452073
Spatial Reference: 102100 (3857)