High Resolution Digital Elevation Model (DEM) of Looe Key, Florida, 2022
A digital elevation model (DEM) was created from underwater images collected at Looe Key (LKR), Florida, in July 2022 using the SfM (Structure-from-Motion) Quantitative Underwater Imaging Device with 5 cameras (SQUID-5) system. The underwater images were processed using SfM photogrammetry techniques into a classified two-class ('unclassified' and 'low noise') 3D point cloud. The DEM was created in Metashape (ver. 1.6.6) from the point cloud and includes points from both classes. The DEM covers a rectangular area of seafloor approximately 850x160 meters (m) (0.13 square kilometers [km]) in size and was saved as Geographic Tagged Image File Format (GeoTIFF) rasters at 1-centimeter (cm) resolution, in a 5-by-2 tile index grid. A 1-meter resolution "quicklook" version of this DEM is also included in this data release, so that users can quickly view the entire dataset at a lower resolution before downloading the higher resolution DEM.
Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[
"010:12"
]
|
| contactPoint |
{
"fn": "SPCMSC Data Management Group",
"@type": "vcard:Contact",
"hasEmail": "mailto:gs-g-spcmsc_data_inquiries@usgs.gov"
}
|
| description | A digital elevation model (DEM) was created from underwater images collected at Looe Key (LKR), Florida, in July 2022 using the SfM (Structure-from-Motion) Quantitative Underwater Imaging Device with 5 cameras (SQUID-5) system. The underwater images were processed using SfM photogrammetry techniques into a classified two-class ('unclassified' and 'low noise') 3D point cloud. The DEM was created in Metashape (ver. 1.6.6) from the point cloud and includes points from both classes. The DEM covers a rectangular area of seafloor approximately 850x160 meters (m) (0.13 square kilometers [km]) in size and was saved as Geographic Tagged Image File Format (GeoTIFF) rasters at 1-centimeter (cm) resolution, in a 5-by-2 tile index grid. A 1-meter resolution "quicklook" version of this DEM is also included in this data release, so that users can quickly view the entire dataset at a lower resolution before downloading the higher resolution DEM. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Digital Data",
"format": "XML",
"accessURL": "https://doi.org/10.5066/P1QRS3SK",
"mediaType": "application/http",
"description": "Landing page for access to the data"
},
{
"@type": "dcat:Distribution",
"title": "Original Metadata",
"format": "XML",
"mediaType": "text/xml",
"description": "The metadata original format",
"downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.ee1f41de-712e-4086-b51e-a60fa7ca7332.xml"
}
]
|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_ee1f41de-712e-4086-b51e-a60fa7ca7332 |
| keyword |
[
"CMHRP",
"Coastal and Marine Hazards and Resources Program",
"Looe Key",
"PCMSC",
"Pacific Coastal and Marine Science Center",
"Physical Habitats and Geomorphology",
"SPCMSC",
"St. Petersburg Coastal and Marine Science Center",
"State of Florida",
"U.S. Geological Survey",
"USGS",
"USGS:ee1f41de-712e-4086-b51e-a60fa7ca7332",
"coral reefs",
"elevation",
"geospatial datasets",
"oceans",
"reef ecosystems",
"remote sensing",
"seabed",
"structure from motion",
"visible light imaging"
]
|
| modified | 2024-08-14T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -81.41016166, 24.54442068, -81.40065243, 24.54779751 |
| theme |
[
"Geospatial"
]
|
| title | High Resolution Digital Elevation Model (DEM) of Looe Key, Florida, 2022 |
