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Nitrogen Flux from Onsite Sewage Disposal Systems (OSDS) - Hawaii

Metadata Updated: October 14, 2022

This layer represents the nitrogen flux coming from onsite sewage disposal systems (OSDS) (e.g., cesspools and septic tanks). OSDS point data were obtained from the University of Hawaii at Manoa (UH) (Aly El-Kadi) and the State of Hawaii Department of Health (DOH) (Bob Whittier) that estimates nitrogen flux from each property, or Tax Map Key (TMK) parcel, with OSDS. The Ocean Tipping Points (OTP) project converted the points to raster by summing nutrient flux values within 500-m pixels. A Focal Statistics tool was then used to calculate the total flux within a 1.5-km radius of each offshore pixel. Units are in grams per day per km squared. The area of interest is from the shoreline of the Main Hawaiian Islands extending 5 km offshore and 1 km inshore.

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

Dates

Metadata Date March 30, 2021
Metadata Created Date November 12, 2020
Metadata Updated Date October 14, 2022
Reference Date(s) March 14, 2017 (creation), March 14, 2017 (issued), March 14, 2017 (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) March 14, 2017 (creation), March 14, 2017 (issued), March 14, 2017 (revision)
Responsible Party National Center for Ecological Analysis and Synthesis (NCEAS) (Point of Contact)
Contact Email
Guid hi_otp_all_osds_nitrogen
Access Constraints
Bbox East Long -154.68250665384699
Bbox North Lat 22.279162574823264
Bbox South Lat 18.848703274150445
Bbox West Long -160.29941254176182
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 http://pacioos.org/metadata/browse/hi_otp_all_osds_nitrogen.png
Harvest Object Id b6c60984-25e6-40f7-b860-826a4a5a337b
Harvest Source Id 54e15a6e-6dde-4c9c-a8f0-345cc0dfccfb
Harvest Source Title ioos
Licence
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-160.29941254176182, 18.848703274150445], [-154.68250665384699, 18.848703274150445], [-154.68250665384699, 22.279162574823264], [-160.29941254176182, 22.279162574823264], [-160.29941254176182, 18.848703274150445]]]}
Progress
Spatial Data Service Type Open Geospatial Consortium Web Coverage Service (WCS)
Spatial Reference System
Spatial Harvester True

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