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) = -89.3604, 29.1496; 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. Pass La Graisse; Louisiana: Plaquemines Parish -89.3604, 29.1496 at a distance of 5 m
2. Joes Bay; Louisiana: Plaquemines Parish -89.3651, 29.1466 at a distance of 560 m
3. Chawee Bay; Louisiana: Plaquemines Parish -89.3743, 29.1530 at a distance of 1401 m
4. Hospital Pond; Louisiana: Plaquemines Parish -89.3432, 29.1427 at a distance of 1843 m
5. Bay Chalon; Louisiana: Plaquemines Parish -89.3415, 29.1399 at a distance of 2132 m
6. Drauzenes Island; Louisiana: Plaquemines Parish -89.3459, 29.1713 at a distance of 2793 m
7. Twin Lakes; Louisiana: Plaquemines Parish -89.3534, 29.1741 at a distance of 2803 m
8. Te Don Pond; Louisiana: Plaquemines Parish -89.3459, 29.1730 at a distance of 2957 m
9. West Bay Oil and Gas Field; Louisiana: Plaquemines Parish -89.3818, 29.1285 at a distance of 3126 m
10. Buras Pond; Louisiana: Plaquemines Parish -89.3593, 29.1783 at a distance of 3186 m

The 7.5 minute series topographic maps for that area