The selected location is:

The elevation is 106 m ( 348 ft )
The gradient is: 0.0 percent
There is no aspect direction.
The local roughness is: 0.0 or flat
The location as decimal degrees (X,Y;Z) = -89.4826, 37.5714; 106 m

The state and county are Illinois: Union County 17181
The HUC is Big Muddy 07140106; Place point in HUC
The Omernik ecoregion is Interior River Lowland (more typical) 72
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Nearby named places (in order by distance)

1. Halfmoon Island; Illinois: Jackson Co. -89.4826, 37.5714 at a distance of 6 m
2. Big Muddy Island; Illinois: Jackson Co. -89.4943, 37.5767 at a distance of 1192 m
3. Aldridge; Illinois: Union Co. -89.4701, 37.5583 at a distance of 1822 m
4. Tower Island Chute; Illinois: Jackson Co. -89.4768, 37.5878 at a distance of 1896 m
5. Running Lake Ditch head; -89.4551, 37.5733 at a distance of 2439 m
6. Halsey; Illinois: Union Co. -89.4529, 37.5672 at a distance of 2665 m
7. McGuire School; Illinois: Union Co. -89.4807, 37.5464 at a distance of 2774 m
8. Grand Tower Island; Missouri: Perry Co. -89.4965, 37.5956 at a distance of 2958 m
9. Wilson Landing; Illinois: Union Co. -89.5162, 37.5706 at a distance of 2969 m
10. Big Muddy River mouth; Illinois: Union Co. -89.5168, 37.5709 at a distance of 3022 m

The 7.5 minute series topographic maps for that area