Layer Estimates:

Layer: GEBCO Contours (ID:43)
Count: 1794208
Extent:

XMin: -179.997916666667
YMin: -89.4416666666667
XMax: 179.997916666667
YMax: 89.7386458333334
Spatial Reference: GEOGCS["GCS_unknown",DATUM["D_unknown",SPHEROID["Spheroid",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]