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) = -90.1468, 40.2014; 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. Grand Island; Illinois: Mason Co. -90.1468, 40.2014 at a distance of 5 m
2. Grass Lake; Illinois: Mason Co. -90.1554, 40.2047 at a distance of 823 m
3. Bath; Illinois: Mason Co. -90.1409, 40.1933, ( 462 ft ) at a distance of 1025 m
4. East Branch Illinois River; Illinois: Mason Co. -90.1540, 40.1917 at a distance of 1236 m
5. Bath Lake; Illinois: Mason Co. -90.1320, 40.2069 at a distance of 1401 m
6. Lakewood Golf Course; Illinois: Mason Co. -90.1290, 40.2083 at a distance of 1699 m
7. Bell Lake; Illinois: Mason Co. -90.1668, 40.2072 at a distance of 1824 m
8. Otter Creek mouth; Illinois: Fulton Co. -90.1645, 40.2164 at a distance of 2251 m
9. Moscow Lake; Illinois: Mason Co. -90.1607, 40.1825 at a distance of 2406 m
10. West Point Landing; Illinois: Fulton Co. -90.1704, 40.2136, ( 441 ft ) at a distance of 2428 m

The 7.5 minute series topographic maps for that area