The selected location is:

The elevation is 137 m ( 449 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) = -89.9929, 40.3433; 137 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. McHarry Pond; Illinois: Mason Co. -89.9929, 40.3433 at a distance of 5 m
2. Quiver School; Illinois: Mason Co. -89.9976, 40.3450 at a distance of 445 m
3. Christian Church; Illinois: Mason Co. -89.9882, 40.3497, ( 472 ft ) at a distance of 819 m
4. Presbyterian Church; Illinois: Mason Co. -89.9679, 40.3494, ( 489 ft ) at a distance of 2230 m
5. Buzzville; Illinois: Mason Co. -89.9904, 40.3661, ( 491 ft ) at a distance of 2545 m
6. Eckard; Illinois: Mason Co. -89.9890, 40.3197, ( 475 ft ) at a distance of 2637 m
7. Chautaugua National Wildlife Refuge; Illinois: Mason Co. -90.0004, 40.3667 at a distance of 2680 m
8. Quiver Creek mouth; Illinois: Mason Co. -90.0234, 40.3531 at a distance of 2814 m
9. Simco Farm; Illinois: Mason Co. -90.0051, 40.3186 at a distance of 2928 m
10. Coon School; Illinois: Mason Co. -89.9565, 40.3394 at a distance of 3121 m

The 7.5 minute series topographic maps for that area