Layer Estimates:

Layer: ne_50m_urban_areas (ID:0)
Count: 2143
Extent:

XMin: -17586697.8454596
YMin: -5823472.03644679
XMax: 19477573.8898827
YMax: 10860782.972822
Spatial Reference: 102100 (3857)

Layer: ne_50m_airports (ID:1)
Count: 281
Extent:

XMin: -19496009.7079628
YMin: -6983935.75597447
XMax: 19877213.6605859
YMax: 11501923.2295895
Spatial Reference: 102100 (3857)

Layer: ne_50m_populated_places (ID:2)
Count: 1249
Extent:

XMin: -19505464.0141529
YMin: -30240971.9583861
XMax: 19950305.8961806
YMax: 14485745.6130678
Spatial Reference: 102100 (3857)

Layer: ne_110m_geographic_lines (ID:3)
Count: 6
Extent:

XMin: -20037507.8427882
YMin: -30240971.4583861
XMax: 20037507.8427882
YMax: 30240971.4583861
Spatial Reference: 102100 (3857)

Layer: ne_50m_admin_0_countries (ID:4)
Count: 241
Extent:

XMin: -20037507.0671618
YMin: -30240971.9583861
XMax: 20037507.0671618
YMax: 18394384.3165277
Spatial Reference: 102100 (3857)