Layer Estimates:
Layer: US_county_1970_join_gen_0 (ID:0)
Count: 3141
Extent:
XMin: -19942590.67959
YMin: 2144792.94557377
XMax: 20012341.2218874
YMax: 11521004.8927788
Spatial Reference: 102100 (3857)
Layer: US_county_1910_join_gen_1 (ID:1)
Count: 2963
Extent:
XMin: -19941951.4746488
YMin: 2144792.94557377
XMax: 20012341.2218874
YMax: 11521004.8927788
Spatial Reference: 102100 (3857)
Layer: GreatMigration_Flow_Arrows_2 (ID:2)
Count: 8
Extent:
XMin: -13595201.9853227
YMin: 3420955.04430483
XMax: -8292319.62857945
YMax: 6034623.08726877
Spatial Reference: 102100 (3857)