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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

    Other Data Resources

    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 82ce1c72-85ef-4506-9abc-cd8352bdf9e3
    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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