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) = -89.3969, 29.2191; 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. West Delta Receiving Station Heliport; Louisiana: Plaquemines Parish -89.3969, 29.2191, ( 2 ft ) at a distance of 6 m
2. Red Pass mouth; Louisiana: Plaquemines Parish -89.4098, 29.2149 at a distance of 1333 m
3. Venice Canal; Louisiana: Plaquemines Parish -89.4062, 29.2283 at a distance of 1362 m
4. Chawee, Bayou; Louisiana: Plaquemines Parish -89.4025, 29.2385 at a distance of 2222 m
5. Venice Oil Field; Louisiana: Plaquemines Parish -89.4087, 29.2391 at a distance of 2496 m
6. Dgs Heliport; Louisiana: Plaquemines Parish -89.3851, 29.2419 at a distance of 2779 m
7. Pass Tit Francois; Louisiana: Plaquemines Parish -89.4059, 29.1944 at a distance of 2870 m
8. Alphonse, Bayou; Louisiana: Plaquemines Parish -89.3957, 29.1924 at a distance of 2959 m
9. Little Pass de Wharf; Louisiana: Plaquemines Parish -89.3726, 29.1935 at a distance of 3693 m
10. Pass Tante Phine; Louisiana: Plaquemines Parish -89.4109, 29.1880 at a distance of 3702 m

The 7.5 minute series topographic maps for that area