The selected location is:

The elevation is 104 m ( 341 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) = -89.5162, 37.5706; 104 m

The state and county are Illinois: Union County 17181
The HUC is Upper Mississippi-Cape Girardeau 07140105; Place point in HUC
The Omernik ecoregion is Interior River Lowland (less typical) 72
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Nearby named places (in order by distance)

1. Wilson Landing; Illinois: Union Co. -89.5162, 37.5706 at a distance of 6 m
2. Big Muddy River mouth; Illinois: Union Co. -89.5168, 37.5709 at a distance of 60 m
3. Apple Creek mouth; Missouri: Cape Girardeau Co. -89.5270, 37.5657 at a distance of 1101 m
4. Birmingham; Missouri: Perry Co. -89.5290, 37.5678, ( 370 ft ) at a distance of 1171 m
5. Tower Island Chute mouth; Missouri: Perry Co. -89.5170, 37.5843 at a distance of 1517 m
6. Hines Landing; Missouri: Cape Girardeau Co. -89.5265, 37.5578 at a distance of 1682 m
7. Big Muddy Island; Illinois: Jackson Co. -89.4943, 37.5767 at a distance of 2051 m
8. Union Point; Illinois: Union Co. -89.5040, 37.5492, ( 350 ft ) at a distance of 2603 m
9. Halfmoon Island; Illinois: Jackson Co. -89.4826, 37.5714 at a distance of 2970 m
10. Grand Tower Island; Missouri: Perry Co. -89.4965, 37.5956 at a distance of 3280 m

The 7.5 minute series topographic maps for that area