Ground control point locations for the UAS survey of the coral reef off Waiakane, Molokai, Hawaii, 24 June 2018
This portion of the data release presents the locations of the temporary ground control points (GCPs) used for the structure-from-motion (SfM) processing of the imagery collected during an unoccupied aerial system (UAS) survey of the coral reef off Waiakane, Molokai, Hawaii, on 24 June 2018. Twenty temporary ground control points (GCPs) were distributed throughout the survey area to establish survey control. The GCPs consisted of: nine submerged targets consisting of small (80 centimeter X 80 centimeter) square tarps with black-and-white cross patterns anchored to the shallow (less than 1.5 meters deep) seafloor using 0.9 kilogram fishing weights; nine sub-aerial targets consisting of orange plastic five-gallon bucket lids (32 centimeter diameter) painted with a black “X” pattern and affixed in a horizontal orientation to vertical rebar stakes placed in areas of reef rubble to provide the targets with sufficient elevation to remain above the water surface; and two sub-aerial ground targets consisting of small (80 centimeter X 80 centimeter) square tarps with black-and-white cross patterns placed in the sand at the shoreline. The GCP positions were measured using post-processed kinematic (PPK) GPS, using corrections from a GPS base station (MK02) located approximately 1 kilometer from the study area. Reference coordinates for MK02 were established using the mean position derived from four static GPS occupations with durations greater than 4 hours submitted to the National Geodetic Survey Online Positioning User Service (NGS OPUS). The GCP positions are presented in a comma-delimited text file.
Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[
"010:12"
]
|
| contactPoint |
{
"fn": "PCMSC Science Data Coordinator",
"@type": "vcard:Contact",
"hasEmail": "mailto:pcmsc_data@usgs.gov"
}
|
| description | This portion of the data release presents the locations of the temporary ground control points (GCPs) used for the structure-from-motion (SfM) processing of the imagery collected during an unoccupied aerial system (UAS) survey of the coral reef off Waiakane, Molokai, Hawaii, on 24 June 2018. Twenty temporary ground control points (GCPs) were distributed throughout the survey area to establish survey control. The GCPs consisted of: nine submerged targets consisting of small (80 centimeter X 80 centimeter) square tarps with black-and-white cross patterns anchored to the shallow (less than 1.5 meters deep) seafloor using 0.9 kilogram fishing weights; nine sub-aerial targets consisting of orange plastic five-gallon bucket lids (32 centimeter diameter) painted with a black “X” pattern and affixed in a horizontal orientation to vertical rebar stakes placed in areas of reef rubble to provide the targets with sufficient elevation to remain above the water surface; and two sub-aerial ground targets consisting of small (80 centimeter X 80 centimeter) square tarps with black-and-white cross patterns placed in the sand at the shoreline. The GCP positions were measured using post-processed kinematic (PPK) GPS, using corrections from a GPS base station (MK02) located approximately 1 kilometer from the study area. Reference coordinates for MK02 were established using the mean position derived from four static GPS occupations with durations greater than 4 hours submitted to the National Geodetic Survey Online Positioning User Service (NGS OPUS). The GCP positions are presented in a comma-delimited text file. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Digital Data",
"format": "XML",
"accessURL": "https://doi.org/10.5066/P9XZT1FK",
"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.61ba8bbad34e9e224ac12fb7.xml"
}
]
|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_61ba8bbad34e9e224ac12fb7 |
| keyword |
[
"Bathymetry and Elevation",
"CHMRP",
"Coastal and Marine Hazards and Resources Program",
"Kalohi Channel",
"Maui County",
"Molokai",
"PCMSC",
"Pacific Coastal and Marine Science Center",
"SfM",
"State of Hawaii",
"Structure-from-motion",
"U.S. Geological Survey",
"UAS",
"USGS",
"USGS:61ba8bbad34e9e224ac12fb7",
"Unmanned aerial system",
"Waiakane",
"aerial and satellite photography",
"aerial photography",
"altimetry",
"coastal processes",
"coral reefs",
"fringing reef",
"geomorphology",
"geospatial datasets",
"image mosaics",
"imageryBaseMapsEarthCover",
"orthophotography",
"photography",
"reef",
"remote sensing",
"structure from motion",
"topographic maps",
"topography"
]
|
| modified | 2022-03-21T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -157.15679, 21.08451, -157.15388, 21.09352 |
| theme |
[
"Geospatial"
]
|
| title | Ground control point locations for the UAS survey of the coral reef off Waiakane, Molokai, Hawaii, 24 June 2018 |
