The selected location is:

The elevation is 148 m ( 486 ft )
The gradient is: 0.8 percent
The aspect direction is: 79.3 degrees or E
The local roughness is: 0.7 or slight
The location as decimal degrees (X,Y;Z) = -89.9737, 40.3192; 148 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. Walker School; Illinois: Mason Co. -89.9737, 40.3192 at a distance of 5 m
2. Eckard; Illinois: Mason Co. -89.9890, 40.3197, ( 475 ft ) at a distance of 1303 m
3. Quiver Creek head; -89.9570, 40.3253 at a distance of 1574 m
4. Simco Farm; Illinois: Mason Co. -90.0051, 40.3186 at a distance of 2670 m
5. Coon School; Illinois: Mason Co. -89.9565, 40.3394 at a distance of 2681 m
6. McHarry Pond; Illinois: Mason Co. -89.9929, 40.3433 at a distance of 3139 m
7. Presbyterian Church; Illinois: Mason Co. -89.9679, 40.3494, ( 489 ft ) at a distance of 3394 m
8. Dieffenbacher School; Illinois: Mason Co. -89.9623, 40.2894, ( 505 ft ) at a distance of 3443 m
9. Quiver School; Illinois: Mason Co. -89.9976, 40.3450 at a distance of 3516 m
10. Christian Church; Illinois: Mason Co. -89.9882, 40.3497, ( 472 ft ) at a distance of 3609 m

The 7.5 minute series topographic maps for that area