Data Collections

NWHI - Necker Island

Necker Island is all that remains of an estimated 10 million-year-old shield volcano. Geologists believe that the portion of the volcano above water was once as large as the current size of the island of O'ahu. Now, the highest point on Necker is about 112 m above sea level. Wave erosion has reduced the volcano to a submerged shelf about 65 km long in a NW-SE direction and about 24 km wide. Necker Island itself is about 1.1 km long and less than 0.3 km wide, with steep sea cliffs on all sides.

Maps and Imagery

• Necker Island map: 239KB, JPG file
• Necker Island IKONOS image (13m): 416KB, JPG file
• Necker Island IKONOS image (8m): 831KB, JPG file
• Necker Island bathymetry image (13m): 434KB, JPG file
• Necker Island bathymetry image (4m)
• Necker Island habitat cover image (13m): 481KB, JPG file
• Necker Island habitat cover image (4m)
• Necker Island detailed habitat image (13m): 485KB, JPG file
• Necker Island detailed habitat image (4m)

Shapefiles

Download shapefiles which correspond to the detailed habitat class and aggregated cover imagery. Each zipped shapefile consists of 6 separate files, with the same root name and .dbf, .prj, .sbn, .sbx, .shp, and .shx extensions.

• Necker Island detailed habitat shapefile
• Necker Island habitat cover shapefile

Assisted Files and Data