The selected location is:

The elevation is 131 m ( 430 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) = -90.1237, 40.2650; 131 m

The state and county are Illinois: Fulton County 17057
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. Langellier School; Illinois: Fulton Co. -90.1237, 40.2650, ( 433 ft ) at a distance of 5 m
2. Matanzas Island; Illinois: Mason Co. -90.1032, 40.2550 at a distance of 2064 m
3. White Oak Creek mouth; Illinois: Mason Co. -90.0957, 40.2561 at a distance of 2576 m
4. Matanzas Lake; Illinois: Mason Co. -90.1057, 40.2453 at a distance of 2665 m
5. Deep Slough; Illinois: Mason Co. -90.0907, 40.2628 at a distance of 2816 m
6. Matanzas Beach; Illinois: Mason Co. -90.1040, 40.2431 at a distance of 2949 m
7. Lange Pond; Illinois: Mason Co. -90.0854, 40.2733 at a distance of 3386 m
8. White Oak School; Illinois: Mason Co. -90.0854, 40.2556 at a distance of 3419 m
9. Kerton Valley School; Illinois: Fulton Co. -90.1632, 40.2586 at a distance of 3435 m
10. Speckman Cemetery; Illinois: Mason Co. -90.0815, 40.2642 at a distance of 3590 m

The 7.5 minute series topographic maps for that area