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) = -89.5834, 38.0742; 152 m

The state and county are Illinois: Perry County 17145
The HUC is Big Muddy 07140106; 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. Rock Fork head; -89.5834, 38.0742 at a distance of 6 m
2. North School (historical); Illinois: Perry Co. -89.5748, 38.0834 at a distance of 1266 m
3. Deviney School (historical); Illinois: Perry Co. -89.5670, 38.0573 at a distance of 2369 m
4. East C Streamline Lake; Illinois: Perry Co. -89.5704, 38.0542 at a distance of 2491 m
5. Sixmile Prairie; Illinois: Perry Co. -89.5632, 38.0519 at a distance of 3040 m
6. North Fork Cox Creek head; -89.6115, 38.0500 at a distance of 3642 m
7. Pipestone Creek head; -89.5757, 38.0369 at a distance of 4190 m
8. West C Streamline Lake; Illinois: Randolph Co. -89.6279, 38.0556 at a distance of 4415 m
9. Hepp Airport; Illinois: Perry Co. -89.5793, 38.0336, ( 505 ft ) at a distance of 4515 m
10. Lost Prairie School; Illinois: Perry Co. -89.5337, 38.0872 at a distance of 4595 m

The 7.5 minute series topographic maps for that area