{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Marissa A Alessi", "hasEmail": "mailto:malessi@usgs.gov"}, "description": "Three semi-automated detection approaches using Sentinel-1 Synthetic Aperture Radar (SAR) have been performed to identify artisanal and small-scale mining (ASM) riverine dredges on the Madeira River in Brazil. The methods are: i) Search for Unidentified Maritime Objects (SUMO), an established method for large ocean ship detection; and two techniques specifically developed for riverine environments: ii) a local detection method; and iii) a global threshold method. The results from each method are contained on this landing page along with the visual interpretation dataset of SAR data used as the validation dataset. The pre-processed SAR data used to produce these results are found also found on this page.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9OML7YH", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.654bd579d34ee4b6e05c2a74.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_654bd579d34ee4b6e05c2a74", "keyword": ["Mining and Mineral Extraction", "SAR", "USGS:654bd579d34ee4b6e05c2a74", "gold", "placer deposit mining", "radar imaging", "remote sensing"], "modified": "2023-11-29T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-65.4483, -9.6922, -63.9144, -8.7787", "theme": ["geospatial"], "title": "Spatial data of artisanal mining riverine dredges using three different Synthetic Aperture Radar detection approaches on the Madeira River, Brazil"}