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) = -90.0376, 40.2606; 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 Interior River Lowland (less typical) 72
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Nearby named places (in order by distance)

1. Bowman School; Illinois: Mason Co. -90.0376, 40.2606, ( 491 ft ) at a distance of 5 m
2. Negro Lake; Illinois: Mason Co. -90.0337, 40.2778 at a distance of 1943 m
3. Kelsey; Illinois: Mason Co. -90.0437, 40.2436 at a distance of 1954 m
4. Havana, Township of; Illinois: Mason Co. -90.0109, 40.2733 at a distance of 2674 m
5. Roat School; Illinois: Mason Co. -90.0040, 40.2650 at a distance of 2899 m
6. Mid-State Dragway; Illinois: Mason Co. -90.0546, 40.2353 at a distance of 3156 m
7. Saint Marys Cemetery; Illinois: Mason Co. -90.0657, 40.2803 at a distance of 3244 m
8. Neteler Cemetery; Illinois: Mason Co. -90.0657, 40.2811 at a distance of 3305 m
9. Frankenfield School; Illinois: Mason Co. -90.0237, 40.2897 at a distance of 3445 m
10. Hancock Cemetery; Illinois: Mason Co. -90.0759, 40.2747 at a distance of 3618 m

The 7.5 minute series topographic maps for that area