The selected location is:

The elevation is 495 m ( 1624 ft )
The gradient is: 3.5 percent
The aspect direction is: 280.0 degrees or W
The local roughness is: 2.4 or average
The location as decimal degrees (X,Y;Z) = -100.3735, 45.1258; 495 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. Swift Bird Creek mouth; South Dakota: Dewey Co. -100.3735, 45.1258 at a distance of 2 m
2. Swift Bird Bay; South Dakota: Dewey Co. -100.3479, 45.1217 at a distance of 2064 m
3. Swift Bird Church (historical); South Dakota: Dewey Co. -100.3179, 45.1219 at a distance of 4395 m
4. Swift Bird Cemetery (historical); South Dakota: Dewey Co. -100.3179, 45.1219 at a distance of 4395 m
5. Buck Creek head; -100.3468, 45.1669 at a distance of 5025 m
6. Bullberry Island (historical); South Dakota: Potter Co. -100.3101, 45.1125 at a distance of 5202 m
7. Swift Bird Day School; South Dakota: Dewey Co. -100.4254, 45.0833 at a distance of 6247 m
8. Marksville; South Dakota: Dewey Co. -100.3773, 45.0694, ( 1855 ft ) at a distance of 6277 m
9. Buck Creek mouth; South Dakota: Dewey Co. -100.3154, 45.1681 at a distance of 6553 m
10. Patch Skin Buttes; South Dakota: Dewey Co. -100.4090, 45.1836 at a distance of 7003 m

The 7.5 minute series topographic maps for that area