Layer Estimates:

Layer: Places of slave departure (ID:0)
Count: 124
Extent:

XMin: -23.6166670002308
YMin: -34.3580560001615
XMax: 57.4999999998812
YMax: 32.6511109999258
Spatial Reference: 4326 (4326)

Layer: Places of slave arrival (ID:1)
Count: 235
Extent:

XMin: -96.153300000064
YMin: -35.1427384910611
XMax: 57.4999999998812
YMax: 51.499999999884
Spatial Reference: 4326 (4326)

Layer: Most used slave trade routes (ID:2)
Count: 10
Extent:

XMin: -76.8182601929106
YMin: -22.9067993162341
XMax: 13.4166669848821
YMax: 19.7499999998548
Spatial Reference: 4326 (4326)