Midway Atoll

[ Bathymetry | Backscatter | Optical Validation | Geomorphology ]

IKONOS satellite image of Photo of Midway Atoll.

IIKONOS satellite image of Photo of Midway Atoll. (Click thumbnail map to open a larger version.)

Midway Atoll, located at 28.2°N, 177.4°W, is the best-known of the islands and atolls in the NWHI thanks to the pivotal World War II battle fought nearby. Drill cores collected at the atoll in the summer of 1965 have shown that this classic ring-shaped atoll is formed from hundreds of meters of shallow-water reef deposits capping the top of an eroded and subsided volcano (Ladd et al., 1967) that formed 28 million years ago.

The atoll includes two islands totalling 1.42 sq. km in area, and the atoll lagoon and surrounding banks include 223 sq. km of seafloor shallower than 100 m. The island contains the most extensive vegetation of all the Northwestern Hawaiian Islands, including introduced Ironwood trees. The islands are important nesting grounds for thousands of seabirds and migratory shorebirds. Midway is one of only two colonies of the endangered Laysan Duck, Anas laysanensis, a species endemic to the Northwestern Hawaiian Islands.

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


Small Midway 20 meter grid image.

Backscatter Imagery

Small Midway grid image.

Optical Validation

Go to Midway optical validation page.



Not yet available

Benthic Habitat Data


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
5m grid data
1m grid data

Not yet available