The selected location is:

The elevation is 565 m ( 1854 ft )
The gradient is: 0.1 percent
The aspect direction is: 90.0 degrees or E
The local roughness is: 0.5 or slight
The location as decimal degrees (X,Y;Z) = -99.8260, 44.8906; 565 m

The state and county are South Dakota: Sully County 46119
The HUC is Lower Lake Oahe 10130105; Place point in HUC
The Omernik ecoregion is Northeastern Great Plains (more typical) 45
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Nearby named places (in order by distance)

1. Kennebec, Township of; South Dakota: Lyman Co. -99.8260, 44.8906 at a distance of 2 m
2. Morton, Township of; South Dakota: Sully Co. -99.8476, 44.8458 at a distance of 5265 m
3. Potts Dam; South Dakota: Potter Co. -99.7793, 44.9303 at a distance of 5749 m
4. Elida, Township of; South Dakota: Potter Co. -99.8690, 44.9339 at a distance of 5888 m
5. Stone Lake State Public Shooting Area; South Dakota: Sully Co. -99.7512, 44.8781 at a distance of 6071 m
6. Stone Lake; South Dakota: Sully Co. -99.7451, 44.8828, ( 1817 ft ) at a distance of 6450 m
7. Kaspar Post Office (historical); South Dakota: Sully Co. -99.8171, 44.8269, ( 1875 ft ) at a distance of 7116 m
8. Avon Springs, Township of; South Dakota: Potter Co. -99.7462, 44.9336 at a distance of 7908 m
9. Fischer Landing Strip; South Dakota: Potter Co. -99.7265, 44.9069, ( 1872 ft ) at a distance of 8065 m
10. Copp School; South Dakota: Potter Co. -99.7354, 44.9264, ( 1882 ft ) at a distance of 8186 m

The 7.5 minute series topographic maps for that area