{
    "identifier": "gov.noaa.nodc:0280938",
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        "fn": "Your contact point",
        "hasEmail": "mailto:[email protected]"
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    "programCode": [
        "010:000"
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    "landingPage": "",
    "title": "Structure-from-Motion Coral Demography derived from Stratified Random Site Imagery collected across the Mariana Archipelago from 2022-05-10 to 2022-06-01 for methods comparison (NCEI Accession 0280938)",
    "description": "Coral adult and juvenile coral colony demographic data described in this dataset are derived from the GIS analysis of benthic photomosaic imagery collected across the Mariana Archipelago in 2022 for a methods comparison with in situ diver data. Official National Coral Reef Monitoring Program (NCRMP) coral demographic data is archived separately under NCEI Accession 0298217. The source imagery was collected using a Structure from Motion (SfM) approach during in-water surveys conducted by divers. Data was collected during the NOAA Pacific Islands Fisheries Science Center (PIFSC) and Ecosystem Sciences Division (ESD) led NCRMP mission across the Mariana Archipelago from 2022-05-10 to 2022-06-01.\n\nThe SfM surveys are part of the Rapid Ecological Assessment (REA) surveys for corals and fish conducted during ESD-led NCRMP missions. Surveys were conducted at sites randomly stratified across sub-island sectors and three depth strata (shallow: 0-6m, mid: 6-18m and deep: >18m). These sites represent a broad range of depths (1-25 m), habitat types (aggregate reef, patch reef, pavement, rock and boulder and rubble), coral cover, and diving conditions. Allocation of sampling effort was proportional to strata area and variance in coral density. The StRS design effectively reduces estimate variance through stratification using environmental covariates and by sampling more sites rather than sampling more transects at a site. Therefore, site-level estimates and site to site comparisons should be used with caution.\n\nDuring each survey, an 18m transect line was deployed along the isobath and photographed using underwater cameras while swimming in a back and forth swim pattern for later processing using an SfM approach. At depths of 1-20 m, SfM surveys were conducted over a 3 x 20m area and at depths > 20m, a 3 x 13m area was surveyed, both with the transect running down the middle of the survey area. The photographs were processed using Agisoft Metashape software to generate orthomosaic images that were analyzed in ArcGIS for juvenile and adult coral colony demographic metrics. Data was collected for each site within four 2.5m2 segments, each 1m wide, along the transect (at 0-2.5m, 5-7.5m, 10-12.5m, and 15-17.5m). At deeper sites where a 3 x 13m area was surveyed, only the first three segments were analyzed in ArcGIS. For each adult coral colony (> 5cm in diameter), maximum diameter, ID (to lowest taxonomic level), and estimated percent old mortality were recorded. Bleaching extent (% of living tissue with reduced pigmentation) and severity were also recorded. Juvenile coral colonies (0.7 to 5cm maximum diameter) were recorded within the first 1 m2 of the first 3 segments. For juvenile colonies, only ID and maximum diameter were recorded.",
    "language": "",
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    "bureauCode": [
        "010:04"
    ],
    "modified": "2025-11-19T16:37:10.377Z",
    "publisher": {
        "@type": "org:Organization",
        "name": "Your Publisher"
    },
    "theme": "",
    "keyword": [
        "0280938",
        "biological data",
        "CORAL",
        "CORAL - CENSUS",
        "CORAL - COLONY SIZE",
        "CORAL - SPECIES IDENTIFICATION",
        "swimmer\/diver",
        "visual observation",
        "biological",
        "GIS product",
        "in situ",
        "laboratory analyses",
        "survey",
        "survey - biological",
        "survey - coral reef",
        "survey - swimmer\/diver",
        "NOAA Ship Rainier",
        "NOAA Pacific Islands Fisheries Science Center, Ecosystem Sciences Division",
        "NOAA Pacific Islands Fisheries Science Center",
        "Coral Reef Conservation Program (CRCP)",
        "CORAL REEF STUDIES",
        "National Coral Reef Monitoring Program (NCRMP)",
        "Pacific Reef and Assessment Monitoring Program (Pacific RAMP)",
        "Marianas Trench Marine National Monument",
        "Northwest Pacific Ocean (limit-180)",
        "oceanography",
        "CRED",
        "CREP",
        "Coral Demography",
        "Coral Reef Ecosystem Division",
        "Coral Reef Ecosystem Program",
        "ESD",
        "Ecosystem Sciences Division",
        "PIFSC",
        "Pacific Islands Fisheries Science Center",
        "DOC\/NOAA\/NMFS > National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
        "DOC\/NOAA\/NMFS\/PIFSC\/ESD > Ecosystem Sciences Division, Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
        "743",
        "National Coral Reef Monitoring Program",
        "RAMP",
        "Reef Assessment and Monitoring Program",
        "Numeric Data Sets > Benthic",
        "EARTH SCIENCE > Biosphere > Ecological Dynamics > Species Richness",
        "EARTH SCIENCE > Biosphere > Zoology > Corals > Coral Condition",
        "EARTH SCIENCE > Biosphere > Zoology > Corals > Coral Diseases > Bleaching",
        "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment",
        "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Coral Colony Size and Condition",
        "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Photographic Analysis",
        "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Rapid assessment studies",
        "EARTH SCIENCE > Biosphere > Zoology > Corals > Scleractinia (stony corals)",
        "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs",
        "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology",
        "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > BioDiversity",
        "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral reef ecology > Coral cover",
        "EARTH SCIENCE > Oceans > Marine Biology > Coral",
        "EARTH SCIENCE > Oceans > Marine Biology > Coral Communities",
        "EARTH SCIENCE > BIOLOGICAL CLASSIFICATION",
        "EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC",
        "EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > REEF > CORAL REEF",
        "EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS\/PROCESSES > COASTAL LANDFORMS > CORAL REEFS",
        "SfM",
        "Structure from Motion",
        "VISUAL OBSERVATIONS > VISUAL OBSERVATIONS",
        "GIS",
        "Ships",
        "RAINIER (call sign: WTEF, ICES code: 315R, 1968-)",
        "COUNTRY\/TERRITORY > Northern Mariana Islands > Aguihan > Aguihan Island (Aguijan) (14N145E0006)",
        "COUNTRY\/TERRITORY > Northern Mariana Islands > Asuncion Island > Asuncion Island (19N145E0001)",
        "COUNTRY\/TERRITORY > Northern Mariana Islands > Maug > Maug Island (20N145E0001)",
        "COUNTRY\/TERRITORY > Northern Mariana Islands > Northern Mariana Islands > Northern Mariana Islands ( CNMI ) (18N146E0000)",
        "COUNTRY\/TERRITORY > Northern Mariana Islands > Pagan > Pagan Island (18N145E0001)",
        "COUNTRY\/TERRITORY > Northern Mariana Islands > Rota > Rota Island ( Luta ) (14N145E0007)",
        "COUNTRY\/TERRITORY > Northern Mariana Islands > Saipan > Saipan Island (15N145E0002)",
        "COUNTRY\/TERRITORY > Northern Mariana Islands > Tinian > Tinian Island (14N145E0005)",
        "COUNTRY\/TERRITORY > United States of America > Guam > Guam (13N144E0000)",
        "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Asuncion Island > Asuncion Island (19N145E0001)",
        "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Guam (13N144E0000)",
        "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Mariana Archipelago > Northern Mariana Islands ( CNMI ) (18N146E0000)",
        "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Maug Island > Maug Island (20N145E0001)",
        "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Pagan Island > Pagan Island (18N145E0001)",
        "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Rota Island > Rota Island ( Luta ) (14N145E0007)",
        "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Saipan Island > Saipan Island (15N145E0002)",
        "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Tinian Island Reefs > Tinian Island (14N145E0005)",
        "OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN",
        "OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > MICRONESIA > GUAM",
        "OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > MICRONESIA > NORTHERN MARIANA ISLANDS",
        "2N4AXY",
        "environment",
        "oceans",
        "imageryBaseMapsEarthCover",
        "biota"
    ]
}