Data · collection
Structure from motion images collected during marine debris surveys at coral reef sites entangled with fishing nets at Pearl and Hermes Atoll in the Northwestern Hawaiian Islands from 2018/09/24 to 2018/10/03
Listed in NASA Earthdata CMR
The photographs described in this dataset were collected using a Structure from Motion (SfM) approach during in-water marine debris swim surveys conducted by snorkelers in search of derelict fishing nets.
Description
Surveys were conducted by the NOAA Fisheries, Ecosystem Sciences Division (ESD) from September 24 to October 3, 2018 at Pearl and Hermes Atoll during an ESD-led marine debris mission to the Northwestern Hawaiian Islands (NWHI) aboard the NOAA Ship Oscar Elton Sette.
The lagoon at Pearl and Hermes was surveyed equally across the spatial gradient, from locations where derelict fishing nets are common to locations where derelict fishing nets have never been observed. During the 2018 mission, only a subset of marine debris surveys resulted in a SfM survey. Fishing nets were located during swim surveys and selected for SfM if the net was interacting with coral or hard substrate, the depth of the net was within ~1â4 m of the surface, and the area of the net fit within the 9 sq. meter SFM survey plot.
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A complete SfM survey is comprised of three sets of images. Two sets were taken at each net-impact site, one series âbeforeâ and one series âafterâ the fishing net was removed from the reef. A final set was taken at a paired âcontrolâ site that was selected â¥50 m away from the net-impact site.
During a SFM survey, a permanent 3 x 3 m plot was established around the center of the fishing net, and the survey plot was photographed using a back and forth swim pattern (âbeforeâ photos) for later processing using a SfM approach. The fishing net was then removed and the same area was photographed again in the same way (âafterâ photos). The paired control site was also photographed using the same method (âcontrolâ photos).
Links
Get the data
- ncei.noaa.gov /metadata/granule/geoportal/?from=0&size=10&esdsl=%7B%22query%2… ↗
Search for data granules belonging to this collection (a granule is the smallest aggregation of data that can be independently described and retrieved).
download · from NASA CMR
- ncei.noaa.gov /archive/accession/PIFSC-SfM-Images-HI ↗
Navigate directly to the URL for a descriptive web page with download links.
download · from NASA CMR
Documentation and papers
- doi.org /10.1016/j.marpolbul.2020.111312 ↗
Suka, R., Huntington B., Morioka, J., O'Brien, K., Acoba, T. 2020. Successful application of a novel technique to quantify negative impacts of derelict fishing nets on Northwestern Hawaiian Island ree
documentation · from NASA CMR
- InPort Metadata Record fisheries.noaa.gov/inport/item/59423 ↗
documentation · from NASA CMR
- doi.org /10.25923/f19b-je14 ↗
Suka, R., Morioka, J., Huntington, B., O'Brien, K., Acoba, T. 2020. 2018 Marine Debris Removal and Assessment in the Northwestern Hawaiian Islands. Pacific Islands Fisheries Science Center, PIFSC Spec
documentation · from NASA CMR
- doi.org /10.25923/h2q8-jv47 ↗
Suka, R., Asbury, M., Couch, C., Gray, A., Winston, M., Oliver, T. 2019. Processing Photomosaic Imagery of Coral Reefs Using Structure-from-Motion Standard Operating Procedures. U.S. Dept. of Commerce
documentation · from NASA CMR
- Preview graphic ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc%3APIFSC-… ↗
preview image · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C2089393297-NOAA_NCEI.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C2089393297-NOAA_NCEI.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- CAMERA · NOAA Ship Oscar Elton Sette · Not provided · Visible Imagery
- Inferred from text
- Image 65% · Pollution and contamination 72%
Provenance · 1 source records, 14 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C2089393297-NOAA_NCEI | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:4105 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (72%) |
| concepts[instrument].gcmd_instrument:camera | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/spectral-engineering/visible-wavelengths/visible-imagery | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:image | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[platform].gcmd_platform:noaa-ship-oscar-elton-sette | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:not-provided | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |