The selected location is:

The elevation is 152 m ( 499 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) = -89.9276, 40.3486; 152 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. Pleasant Row School; Illinois: Mason Co. -89.9276, 40.3486, ( 495 ft ) at a distance of 5 m
2. Topeka; Illinois: Mason Co. -89.9312, 40.3303 at a distance of 2050 m
3. Coon School; Illinois: Mason Co. -89.9565, 40.3394 at a distance of 2659 m
4. Ebenezer School; Illinois: Mason Co. -89.9507, 40.3708 at a distance of 3155 m
5. Deverman School; Illinois: Mason Co. -89.9137, 40.3208 at a distance of 3300 m
6. Quiver, Township of; Illinois: Mason Co. -89.9373, 40.3778 at a distance of 3351 m
7. Presbyterian Church; Illinois: Mason Co. -89.9679, 40.3494, ( 489 ft ) at a distance of 3426 m
8. Quiver Creek head; -89.9570, 40.3253 at a distance of 3594 m
9. Mason Tazewell Drainage Ditch; Illinois: Mason Co. -89.8912, 40.3261 at a distance of 3972 m
10. Mason State Nursery; Illinois: Mason Co. -89.9026, 40.3153 at a distance of 4260 m

The 7.5 minute series topographic maps for that area