The selected location is:

The elevation is 131 m ( 430 ft )
The gradient is: 0.0 percent
There is no aspect direction.
The local roughness is: 0.4 or slight
The location as decimal degrees (X,Y;Z) = -90.3943, 40.0881; 131 m

The state and county are Illinois: Cass County 17017
The HUC is Lower Illinois-Lake Chautauqua 07130003; 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. Sugar Creek mouth; Illinois: Schuyler Co. -90.3943, 40.0881 at a distance of 5 m
2. Sugar Creek Island; Illinois: Cass Co. -90.3898, 40.0931 at a distance of 678 m
3. Sugar Creek Lake; Illinois: Schuyler Co. -90.3965, 40.0956 at a distance of 859 m
4. Treadway Lake; Illinois: Cass Co. -90.3779, 40.0875 at a distance of 1398 m
5. Big Lake; Illinois: Schuyler Co. -90.4101, 40.0750 at a distance of 1980 m
6. Friddle Branch mouth; Illinois: Schuyler Co. -90.3840, 40.1075 at a distance of 2330 m
7. Vetter Slough; Illinois: Cass Co. -90.3798, 40.0672 at a distance of 2624 m
8. Sangamon Bay; Illinois: Cass Co. -90.3734, 40.1058 at a distance of 2656 m
9. Little Lake; Illinois: Schuyler Co. -90.4193, 40.0728 at a distance of 2724 m
10. Toppers Hole State Conservation Area; Illinois: Cass Co. -90.3604, 40.0828 at a distance of 2948 m

The 7.5 minute series topographic maps for that area