The selected location is:

The elevation is 579 m ( 1900 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) = -100.8026, 44.8611; 579 m

The state and county are South Dakota: Dewey County 46041
The HUC is Lower Lake Oahe 10130105; Place point in HUC
The Omernik ecoregion is Northwestern Great Plains (more typical) 43
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Nearby named places (in order by distance)

1. Joes Creek head; -100.8026, 44.8611 at a distance of 3 m
2. Dog Eagle Ranch; South Dakota: Dewey Co. -100.8387, 44.8783 at a distance of 3435 m
3. West Branch Rousseau Creek mouth; South Dakota: Dewey Co. -100.8568, 44.8567 at a distance of 4314 m
4. Rousseau Creek head; -100.8573, 44.8567 at a distance of 4354 m
5. East Branch Rousseau Creek mouth; South Dakota: Dewey Co. -100.8573, 44.8564 at a distance of 4358 m
6. Rousseau Creek mouth; South Dakota: Dewey Co. -100.8429, 44.8275 at a distance of 4912 m
7. Fox Creek mouth; South Dakota: Dewey Co. -100.7390, 44.8556 at a distance of 5062 m
8. Charlie Creek mouth; South Dakota: Dewey Co. -100.7362, 44.8611 at a distance of 5246 m
9. Sogge Ranch; South Dakota: Dewey Co. -100.8340, 44.9250 at a distance of 7521 m
10. Wager Ranch; South Dakota: Dewey Co. -100.8632, 44.9142 at a distance of 7598 m

The 7.5 minute series topographic maps for that area