The selected location is:

The elevation is 494 m ( 1621 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) = -100.5365, 44.4569; 494 m

The state and county are South Dakota: Hughes County 46065
The HUC is Lower Lake Oahe 10130105; Place point in HUC
The Omernik ecoregion is Northwestern Great Plains (less typical) 43
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Nearby named places (in order by distance)

1. Harney Cabin (historical); South Dakota: Hughes Co. -100.5365, 44.4569 at a distance of 3 m
2. Oahe; South Dakota: Hughes Co. -100.5310, 44.4578, ( 1700 ft ) at a distance of 447 m
3. Oahe (historical); South Dakota: Hughes Co. -100.5304, 44.4575 at a distance of 488 m
4. Vanderplat Ranch (historical); South Dakota: Hughes Co. -100.5329, 44.4519 at a distance of 626 m
5. Oahe Post Office (historical); South Dakota: Hughes Co. -100.5287, 44.4558 at a distance of 632 m
6. Chamberlain Ranch (historical); South Dakota: Hughes Co. -100.5429, 44.4531, ( 1440 ft ) at a distance of 665 m
7. Oahe Mission (historical); South Dakota: Hughes Co. -100.5282, 44.4553 at a distance of 683 m
8. Lone Grave Cemetery; South Dakota: Hughes Co. -100.5218, 44.4556, ( 1440 ft ) at a distance of 1177 m
9. Peoria Bottoms (historical); South Dakota: Hughes Co. -100.5512, 44.4492, ( 1440 ft ) at a distance of 1452 m
10. Riggs and Company Ranch (historical); South Dakota: Hughes Co. -100.5624, 44.4597 at a distance of 2086 m

The 7.5 minute series topographic maps for that area