The selected location is:

The elevation is 139 m ( 455 ft )
The gradient is: 8.0 percent
The aspect direction is: 187.1 degrees or S
The local roughness is: 7.2 or average
The location as decimal degrees (X,Y;Z) = -73.8274, 41.0990; 139 m

The state and county are New York: Westchester County 36119
The HUC is Lower Hudson 02030101; Place point in HUC
The Omernik ecoregion is Northeastern Coastal Zone (more typical) 59
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Nearby named places (in order by distance)

1. Fergusons Lake; New York: Westchester Co. -73.8274, 41.0990 at a distance of 2 m
2. Pocantico Hills School; New York: Westchester Co. -73.8296, 41.0990 at a distance of 183 m
3. Rockefeller Brook head; -73.8343, 41.0968 at a distance of 628 m
4. Pocantico Hills; New York: Westchester Co. -73.8188, 41.0970 at a distance of 758 m
5. Pocantico Hills; New York: Westchester Co. -73.8360, 41.0945 at a distance of 878 m
6. Swan Lake; New York: Westchester Co. -73.8343, 41.1082, ( 294 ft ) at a distance of 1174 m
7. New Croton Aqueduct; New York: Westchester Co. -73.8432, 41.0904 at a distance of 1634 m
8. Sleepy Hollow mouth; New York: Westchester Co. -73.8485, 41.0995 at a distance of 1772 m
9. Kykuit Hill; New York: Westchester Co. -73.8446, 41.0895 at a distance of 1788 m
10. Rockefeller Brook mouth; New York: Westchester Co. -73.8490, 41.1004 at a distance of 1820 m

The 7.5 minute series topographic maps for that area