The selected location is:

The elevation is 586 m ( 1922 ft )
The gradient is: 1.5 percent
The aspect direction is: 234.3 degrees or SW
The local roughness is: 1.5 or average
The location as decimal degrees (X,Y;Z) = -99.8526, 45.3042; 586 m

The state and county are South Dakota: Walworth County 46129
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. Theodore (historical); South Dakota: Walworth Co. -99.8526, 45.3042, ( 1904 ft ) at a distance of 2 m
2. Swan Lake Creek mouth; South Dakota: Walworth Co. -99.8373, 45.2967 at a distance of 1462 m
3. Swan Lake; South Dakota: Walworth Co. -99.8540, 45.2900, ( 1851 ft ) at a distance of 1583 m
4. Swan Lake State Public Shooting Area; South Dakota: Walworth Co. -99.8273, 45.2861 at a distance of 2827 m
5. Theodore, Township of; South Dakota: Walworth Co. -99.8823, 45.3261 at a distance of 3367 m
6. Swan Creek head; -99.9021, 45.3228 at a distance of 4397 m
7. Swan Lake, Township of; South Dakota: Walworth Co. -99.8837, 45.2683 at a distance of 4678 m
8. William P Ransch Dam; South Dakota: Potter Co. -99.8171, 45.2450 at a distance of 7146 m
9. Ryan, Township of; South Dakota: Walworth Co. -99.8818, 45.3847 at a distance of 9233 m
10. Pembroke (historical); South Dakota: Potter Co. -99.8337, 45.2181, ( 1890 ft ) at a distance of 9685 m

The 7.5 minute series topographic maps for that area