The selected location is:

The elevation is 1 m ( 3 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) = -81.4815, 30.6971; 1 m

The state and county are Florida: Nassau County 12089
The HUC is St. Marys 03070204; Place point in HUC
The Omernik ecoregion is Middle Atlantic Coastal Plain (less typical) 63
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Nearby named places (in order by distance)

1. Saint Joseph Creek head; -81.4815, 30.6971 at a distance of 4 m
2. Little Tiger Island; Florida: Nassau Co. -81.4784, 30.6905 at a distance of 785 m
3. Tiger Creek mouth; Florida: Nassau Co. -81.4815, 30.7074 at a distance of 1146 m
4. Amelia River mouth; Florida: Nassau Co. -81.4648, 30.6994 at a distance of 1619 m
5. Tiger Creek head; -81.4951, 30.6880 at a distance of 1647 m
6. Quarantine Reach; Florida: Nassau Co. -81.4626, 30.6971, ( 27 ft ) at a distance of 1809 m
7. Saint Joseph Creek mouth; Florida: Nassau Co. -81.4645, 30.6841 at a distance of 2171 m
8. Old Town Reach; Florida: Nassau Co. -81.4629, 30.6858, ( 21 ft ) at a distance of 2175 m
9. Egans Creek mouth; Florida: Nassau Co. -81.4590, 30.6905 at a distance of 2274 m
10. Seaboard Reach; Florida: Nassau Co. -81.4645, 30.6799, ( 28 ft ) at a distance of 2504 m

The 7.5 minute series topographic maps for that area