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Papahanaumokuakea Marine National Monument (PMNM) - Northwestern Hawaiian Islands (NWHI)

Metadata Updated: October 14, 2022

Boundary of the Papahanaumokuakea Marine National Monument (PMNM), located in the Northwestern Hawaiian Islands (NWHI). Created in 2006, Papahanaumokuakea is the largest conservation area in the U.S. and one of the largest marine conservation areas in the world. It is home to extensive coral reefs harboring over 7,000 marine species, one quarter of which are found only in Hawaii. Many of the islands and shallow water environments are important habitats for rare species such as the threatened green sea turtle and the endangered Hawaiian monk seal. Significant cultural Native Hawaiian sites can also be found on the islands of Nihoa and Mokumanamana (Necker Island). Co-managed with the State of Hawaii and the U.S. Department of the Interior, the monument preserves one of the most untouched areas of coral reef in the world.

This layer shows the PMNM boundary after its expansion in 2016. On August 26, 2016, President Obama signed a proclamation expanding the monument from 139,797 square miles (362,073 square kilometers) to 582,578 square miles (1,508,870 square kilometers). This extended the monument boundary westward of -163 degrees longitude out to Hawaii's Exclusive Economic Zone (EEZ) at 200 nautical miles offshore. The present layer shows the monument boundary as it existed after this expansion. To view the previous, smaller boundary, access the data layer for "hi_noaa_nwhi_papahanaumokuakea_2006" instead.

NOTE: This layer is provided as polygon features. For polyline features, please see the layer named "hi_noaa_nwhi_papahanaumokuakea_line" instead. Both polygon and polyline formats are provided for this dataset because the monument boundary spans the antimeridian (+/-180 degrees longitude) making it difficult to display in many GIS software applications without showing a division at the antimeridian.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Date March 30, 2021
Metadata Created Date November 12, 2020
Metadata Updated Date October 14, 2022
Reference Date(s) January 25, 2016 (creation), January 25, 2016 (issued), January 25, 2016 (revision)
Frequency Of Update

Metadata Source

Harvested from ioos

Graphic Preview

Sample image.

Additional Metadata

Resource Type Dataset
Metadata Date March 30, 2021
Metadata Created Date November 12, 2020
Metadata Updated Date October 14, 2022
Reference Date(s) January 25, 2016 (creation), January 25, 2016 (issued), January 25, 2016 (revision)
Responsible Party Papahanaumokuakea Marine National Monument (PMNM) (Point of Contact)
Contact Email
Guid hi_noaa_nwhi_papahanaumokuakea
Access Constraints
Bbox East Long 179.9998389726
Bbox North Lat 31.7978661712
Bbox South Lat 19.2345708955462
Bbox West Long -179.9999999577
Coupled Resource [{"title": [], "href": ["#DataIdentification"], "uuid": []}, {"title": [], "href": ["#DataIdentification"], "uuid": []}, {"title": [], "href": ["#DataIdentification"], "uuid": []}]
Frequency Of Update
Graphic Preview Description Sample image.
Graphic Preview File
Harvest Object Id 7dc5d3b4-daa2-4236-aae2-65c26150f5bf
Harvest Source Id 54e15a6e-6dde-4c9c-a8f0-345cc0dfccfb
Harvest Source Title ioos
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-179.9999999577, 19.2345708955462], [179.9998389726, 19.2345708955462], [179.9998389726, 31.7978661712], [-179.9999999577, 31.7978661712], [-179.9999999577, 19.2345708955462]]]}
Spatial Data Service Type Open Geospatial Consortium Web Feature Service (WFS)
Spatial Reference System
Spatial Harvester True

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