The selected location is:

The elevation is 142 m ( 466 ft )
The gradient is: 0.0 percent
There is no aspect direction.
The local roughness is: 0.4 or slight
The location as decimal degrees (X,Y;Z) = -90.0993, 40.2311; 142 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. Matanzas School (historical); Illinois: Mason Co. -90.0993, 40.2311 at a distance of 5 m
2. Matanzas; Illinois: Mason Co. -90.0995, 40.2311, ( 465 ft ) at a distance of 20 m
3. Matanzas Beach; Illinois: Mason Co. -90.1040, 40.2431 at a distance of 1397 m
4. Matanzas Lake; Illinois: Mason Co. -90.1057, 40.2453 at a distance of 1674 m
5. Matanzas Church; Illinois: Mason Co. -90.0890, 40.2161 at a distance of 1877 m
6. Lakewood; Illinois: Mason Co. -90.0851, 40.2472 at a distance of 2161 m
7. Dierker Lake; Illinois: Mason Co. -90.1276, 40.2217 at a distance of 2625 m
8. Matanzas Island; Illinois: Mason Co. -90.1032, 40.2550 at a distance of 2680 m
9. White Oak Creek mouth; Illinois: Mason Co. -90.0957, 40.2561 at a distance of 2798 m
10. White Oak School; Illinois: Mason Co. -90.0854, 40.2556 at a distance of 2970 m

The 7.5 minute series topographic maps for that area