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: 0.0 or flat
The location as decimal degrees (X,Y;Z) = -90.1837, 40.1600; 131 m

The state and county are Illinois: Mason County 17125
The HUC is Lower Illinois-Lake Chautauqua 07130003; Place point in HUC
The Omernik ecoregion is Interior River Lowland (less typical) 72
The 1:100,000 map (if available); Switch to TerraServer
Zoom on that location with radius = 2 km; 5 km ; 10 km ; 20 km ; 30 km ; custom.

Nearby named places (in order by distance)

1. Patterson Bay; Illinois: Mason Co. -90.1837, 40.1600 at a distance of 5 m
2. Patterson School; Illinois: Mason Co. -90.1801, 40.1500, ( 457 ft ) at a distance of 1146 m
3. Curtis Lake; Illinois: Mason Co. -90.1984, 40.1589 at a distance of 1260 m
4. Jack Lake; Illinois: Mason Co. -90.1829, 40.1756 at a distance of 1738 m
5. Snicarte Island; Illinois: Mason Co. -90.2029, 40.1475 at a distance of 2143 m
6. Devils Elbow; Illinois: Fulton Co. -90.2001, 40.1417 at a distance of 2463 m
7. Holmes Landing; Illinois: Schuyler Co. -90.2029, 40.1769, ( 435 ft ) at a distance of 2494 m
8. Wilson Creek mouth; Illinois: Fulton Co. -90.2018, 40.1778 at a distance of 2512 m
9. Moscow Lake; Illinois: Mason Co. -90.1607, 40.1825 at a distance of 3178 m
10. Moscow Farm; Illinois: Mason Co. -90.1454, 40.1664 at a distance of 3338 m

The 7.5 minute series topographic maps for that area