The selected location is:

The elevation is 149 m ( 489 ft )
The gradient is: 0.8 percent
The aspect direction is: 268.1 degrees or W
The local roughness is: 0.9 or average
The location as decimal degrees (X,Y;Z) = -89.9312, 40.3303; 149 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. Topeka; Illinois: Mason Co. -89.9312, 40.3303 at a distance of 5 m
2. Deverman School; Illinois: Mason Co. -89.9137, 40.3208 at a distance of 1820 m
3. Pleasant Row School; Illinois: Mason Co. -89.9276, 40.3486, ( 495 ft ) at a distance of 2059 m
4. Quiver Creek head; -89.9570, 40.3253 at a distance of 2262 m
5. Coon School; Illinois: Mason Co. -89.9565, 40.3394 at a distance of 2379 m
6. Mason State Nursery; Illinois: Mason Co. -89.9026, 40.3153 at a distance of 2943 m
7. Mason Tazewell Drainage Ditch; Illinois: Mason Co. -89.8912, 40.3261 at a distance of 3429 m
8. Presbyterian Church; Illinois: Mason Co. -89.9679, 40.3494, ( 489 ft ) at a distance of 3775 m
9. Walker School; Illinois: Mason Co. -89.9737, 40.3192 at a distance of 3817 m
10. Larry Barrett Rla Airport; Illinois: Mason Co. -89.9418, 40.2958, ( 510 ft ) at a distance of 3931 m

The 7.5 minute series topographic maps for that area