The selected location is:

The elevation is 0 m ( 0 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) = -89.3459, 29.1730; 0 m

The state and county are Louisiana: Plaquemines Parish 22075
The HUC is Lower Mississippi-New Orleans 08090100; Place point in HUC
The Omernik ecoregion is Mississippi Alluvial Plain (less typical) 73
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Nearby named places (in order by distance)

1. Te Don Pond; Louisiana: Plaquemines Parish -89.3459, 29.1730 at a distance of 5 m
2. Drauzenes Island; Louisiana: Plaquemines Parish -89.3459, 29.1713 at a distance of 186 m
3. Grand Pass; Louisiana: Plaquemines Parish -89.3432, 29.1741 at a distance of 295 m
4. Twin Lakes; Louisiana: Plaquemines Parish -89.3534, 29.1741 at a distance of 736 m
5. Oil Mine Bayou (historical); Louisiana: Plaquemines Parish -89.3357, 29.1763 at a distance of 1063 m
6. Buras Pond; Louisiana: Plaquemines Parish -89.3593, 29.1783 at a distance of 1427 m
7. Noels Pass; Louisiana: Plaquemines Parish -89.3523, 29.1846 at a distance of 1429 m
8. Sullivan Bayou (historical); Louisiana: Plaquemines Parish -89.3309, 29.1802 at a distance of 1668 m
9. Cooks Canal (historical); Louisiana: Plaquemines Parish -89.3473, 29.1924 at a distance of 2157 m
10. Pass La Graisse; Louisiana: Plaquemines Parish -89.3604, 29.1496 at a distance of 2947 m

The 7.5 minute series topographic maps for that area