The selected location is:

The elevation is 141 m ( 463 ft )
The gradient is: 0.2 percent
The aspect direction is: 245.6 degrees or SW
The local roughness is: 0.8 or slight
The location as decimal degrees (X,Y;Z) = -89.9570, 40.3253; 141 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 Central Corn Belt Plains (less typical) 54
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Nearby named places (in order by distance)

1. Quiver Creek head; -89.9570, 40.3253 at a distance of 5 m
2. Coon School; Illinois: Mason Co. -89.9565, 40.3394 at a distance of 1571 m
3. Walker School; Illinois: Mason Co. -89.9737, 40.3192 at a distance of 1572 m
4. Topeka; Illinois: Mason Co. -89.9312, 40.3303 at a distance of 2262 m
5. Eckard; Illinois: Mason Co. -89.9890, 40.3197, ( 475 ft ) at a distance of 2790 m
6. Presbyterian Church; Illinois: Mason Co. -89.9679, 40.3494, ( 489 ft ) at a distance of 2837 m
7. Larry Barrett Rla Airport; Illinois: Mason Co. -89.9418, 40.2958, ( 510 ft ) at a distance of 3516 m
8. Pleasant Row School; Illinois: Mason Co. -89.9276, 40.3486, ( 495 ft ) at a distance of 3599 m
9. McHarry Pond; Illinois: Mason Co. -89.9929, 40.3433 at a distance of 3651 m
10. Deverman School; Illinois: Mason Co. -89.9137, 40.3208 at a distance of 3712 m

The 7.5 minute series topographic maps for that area