The selected location is:

The elevation is 192 m ( 631 ft )
The gradient is: 1.6 percent
The aspect direction is: 91.3 degrees or E
The local roughness is: 1.9 or average
The location as decimal degrees (X,Y;Z) = -88.6634, 39.9878; 192 m

The state and county are Illinois: Piatt County 17147
The HUC is Upper Sangamon 07130006; 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. Willow Branch mouth; Illinois: Piatt Co. -88.6634, 39.9878 at a distance of 5 m
2. Willow Branch, Township of; Illinois: Piatt Co. -88.6798, 39.9850 at a distance of 1432 m
3. Willow Branch Cemetery; Illinois: Piatt Co. -88.6482, 39.9811 at a distance of 1497 m
4. Four-H Lake; Illinois: Piatt Co. -88.6576, 40.0014, ( 658 ft ) at a distance of 1594 m
5. Four H Memorial Lake Dam; Illinois: Piatt Co. -88.6568, 40.0017 at a distance of 1648 m
6. Four H Memorial Lake; Illinois: Piatt Co. -88.6568, 40.0017 at a distance of 1648 m
7. Ater Cemetery; Illinois: Piatt Co. -88.6845, 39.9844 at a distance of 1838 m
8. Hog Chute Bridge; Illinois: Piatt Co. -88.6834, 39.9783 at a distance of 2003 m
9. Robert Allerton Park; Illinois: Piatt Co. -88.6462, 40.0036 at a distance of 2293 m
10. Arrowhead Lake; Illinois: Piatt Co. -88.6429, 40.0094 at a distance of 2974 m

The 7.5 minute series topographic maps for that area