The selected location is:

The elevation is 151 m ( 495 ft )
The gradient is: 0.1 percent
There is no aspect direction.
The local roughness is: 0.4 or slight
The location as decimal degrees (X,Y;Z) = -89.9890, 40.3197; 151 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
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Nearby named places (in order by distance)

1. Eckard; Illinois: Mason Co. -89.9890, 40.3197, ( 475 ft ) at a distance of 5 m
2. Walker School; Illinois: Mason Co. -89.9737, 40.3192 at a distance of 1300 m
3. Simco Farm; Illinois: Mason Co. -90.0051, 40.3186 at a distance of 1375 m
4. McHarry Pond; Illinois: Mason Co. -89.9929, 40.3433 at a distance of 2646 m
5. Quiver Creek head; -89.9570, 40.3253 at a distance of 2789 m
6. Quiver School; Illinois: Mason Co. -89.9976, 40.3450 at a distance of 2908 m
7. Christian Church; Illinois: Mason Co. -89.9882, 40.3497, ( 472 ft ) at a distance of 3337 m
8. Coon School; Illinois: Mason Co. -89.9565, 40.3394 at a distance of 3525 m
9. Boatman School; Illinois: Mason Co. -90.0320, 40.3197 at a distance of 3656 m
10. Presbyterian Church; Illinois: Mason Co. -89.9679, 40.3494, ( 489 ft ) at a distance of 3758 m

The 7.5 minute series topographic maps for that area