Benthic Habitat Data

Bathymetry

Zipped data files contain 1) grid data file (GMT or ASCII), 2) high-res JPG of image, and 3) explanatory metadata text file (identical to linked file listed below).

20m grid data

Not yet available.

Not yet available .

Northwest Hawaiian Islands: Laysan Island
                              (and Northampton Seamounts)

[ Bathymetry | Backscatter | Optical Validation | Geomorphology ]

Google Earth view of Laysan Island

Google Earth view of Laysan Island (Click thumbnail map to open a larger version.)

Laysan Island, at 2.4km (1.5 miles) long and 1.6km (1 mile) wide, is the second largest land mass in the NWHI (4 sq km.). It has proportionally less reef area than most of the other NWHI, however, with narrow fringing reefs surrounded by extensive sand beds in the shallows. As a vegetated land mass Laysan is home to large populations of seabirds and migratory shorebirds, including the Laysan Albatross, Phoebastria immutabilis, which ranges across the North Pacific. The island contains a hypersaline lake in its center, which is home to one of only two colonies of the endangered Laysan Duck, Anas laysanensis, a species endemic to the Northwestern Hawaiian Islands.

Northampton Seamounts are a pair of submerged peaks (~ 300 sq km. and 170 sq km.) about 64 km (40 miles) southwest of Laysan Island. They lie 35 m and 27 m beneath the surface, and to date have only been surveyed by sonar mapping technology, remotely operated vehicles, and manned submersibles.

Click thumbnail maps below to explore PIBHMC's data sets.

Bathymetry

Small Northampton to Laysan 20 meter grid image.

 

 

Not yet available

Optical Validation

Go to Laysan optical validation page.

 

 

Not yet available

 

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