USGS CoastCam at Isla Verde, Puerto Rico: 2022-2023 Intrinsic and Extrinsic Calibration Data (Camera 2)

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Frequently anticipated questions:


What does this data set describe?

Title:
USGS CoastCam at Isla Verde, Puerto Rico: 2022-2023 Intrinsic and Extrinsic Calibration Data (Camera 2)
Abstract:
Two digital video cameras were installed at Isla Verde, Puerto Rico (PR); camera 1 faced northeast offshore and camera 2 faced east-northeast along the beach. Every hour during daylight hours, daily starting in August 2022, the camera collected raw video and produced snapshots and time-averaged image products. This metadata record is for camera 2 and includes the necessary intrinsic orientation (IO) and extrinsic orientation (EO) calibration data to utilize imagery to make quantitative measurements. The cameras are part of a U.S. Geological Survey (USGS) research project to study the beach and nearshore environment. USGS researchers analyzed the imagery collected from this camera to remotely sense a range of information including shoreline position, sandbar migration, wave run-up on the beach, alongshore currents, and nearshore bathymetry. This camera is part of the USGS CoastCam network.
Supplemental_Information:
The bounding coordinates below represent the limits of the rectified images from the CoastCam that covers the entirety of the beach at low tide and the adjacent nearshore area approximately 600 meters (m) directly in line of camera 2 facing alongshore. The intrinsic calibration photos were taken at the deployment site on 20220813 (YYYYMMDD) and their location information is not consequential.
  1. How might this data set be cited?
    Birchler, Justin J., Palmsten, Margaret L., Vargas-Babilonia, Priscila, Swanson, Eric, and Buckley, Mark L., 20250324, USGS CoastCam at Isla Verde, Puerto Rico: 2022-2023 Intrinsic and Extrinsic Calibration Data (Camera 2):.

    This is part of the following larger work.

    Birchler, Justin J., Palmsten, Margaret L., Vargas-Babilonia, Priscila, Swanson, Eric, and Buckley, Mark L., 20250324, USGS CoastCam at Isla Verde, Puerto Rico: 2022-2023 Calibration Data: U.S. Geological Survey data release doi:10.5066/P13DOBTM, U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -66.012234
    East_Bounding_Coordinate: -66.006539
    North_Bounding_Coordinate: 18.447649
    South_Bounding_Coordinate: 18.443702
  3. What does it look like?
    islaverde_c2_calibrationIOEO_exampleImagery.zip (TIFF, JPEG)
    Zip file containing the following examples: A) Image used in IO calibration (c2_20220813_IO_0106_01829792B498.tiff) and B) Image used in EO calibration (islaverde_c2_20220814_GCP_image_annotated.jpg) and the target numbers for use in the Coastal Imaging Research Network (CIRN) Quantitative Coastal Imaging Toolbox (QCIT) that correspond to the numbers in islaverde_c2_20220814_EO_GCPsurvey.csv (file available in islaverde_c2_20220814_EO.zip).
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 13-Aug-2022
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: tabular digital data, raster digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 20
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -63.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000.0
      False_Northing: 0.0
      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 1
      Ordinates (y-coordinates) are specified to the nearest 1
      Planar coordinates are specified in meters
      The horizontal datum used is NAD83_National_Spatial_Reference_System_2011.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222101.
      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: Puerto Rico Vertical Datum of 2002
      Altitude_Resolution: 0.001
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates
  7. How does the data set describe geographic features?
    islaverde_c2_20220813_IO.yml
    YML file containing the solved IO for camera 2 from step A in the Camera Calibration procedures outlined in Bruder and Brodie (2020). (Source: USGS)
    NU
    the number of pixel columns (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:2448
    Maximum:2448
    Units:pixel
    NV
    the number of pixel rows (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:2048
    Maximum:2048
    Units:pixel
    coU
    U component of principal point (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:1283.53839251906
    Maximum:1283.53839251906
    Units:pixel
    coV
    V component of principal point (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:1074.74188626567
    Maximum:1074.74188626567
    Units:pixel
    fx
    U component of focal length in pixels (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:3405.62757347742
    Maximum:3405.62757347742
    Units:pixels
    fy
    V component of focal length in pixels (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:3400.51071711303
    Maximum:3400.51071711303
    Units:pixels
    d1
    Radial distortion coefficient (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:-0.185188921980931
    Maximum:-0.185188921980931
    d2
    Radial distortion coefficient (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:-0.250374388630462
    Maximum:-0.250374388630462
    d3
    Radial distortion coefficient (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:0.821885650427572
    Maximum:0.821885650427572
    t1
    Tangential distortion coefficient (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:-0.000389484338764506
    Maximum:-0.000389484338764506
    t2
    Tangential distortion coefficient (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:0.0000366488946958087
    Maximum:0.0000366488946958087
    islaverde_c2_20220814_EO_GCPsurvey.csv, islaverde_c2_20221209_EO_GCPsurvey.csv, and islaverde_c2_20230323_EO_GCPsurvey.csv
    The CSV files containing the location (x,y,z) of the ground control points (black and white targets) in the CoastCam field of view. (Source: USGS)
    GCP
    Number of each GCP that can be found in islaverde_c2_20220814_GCP_image_annotated.jpg, islaverde_c2_20221209_GCP_image_annotated.jpg, and islaverde_c2_20230323_GCP_image_annotated.jpg so that targets can be labeled correctly in Step B of Camera Calibration steps in Bruder and Brodie (2020). (Source: U.S. Geological Survey)
    Range of values
    Minimum:1
    Maximum:20
    ID
    Name of GCP (Source: U.S. Geological Survey) Letter-number combination describing unique GCPs.
    Easting (UTM)
    Post-Processed Kinematic (PPK) X-coordinates in NAD83(2011)/UTM Zone 20N (Source: U.S. Geological Survey)
    Range of values
    Minimum:181835.1680
    Maximum:182227.6450
    Units:meters
    Northing (UTM)
    Post-Processed Kinematic (PPK) Y-coordinates in NAD83(2011)/UTM Zone 20N (Source: U.S. Geological Survey)
    Range of values
    Minimum:2041937.3100
    Maximum:2042010.7090
    Units:meters
    Lon
    Longitude (decimal degrees) in NAD83(2011) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-66.01196314
    Maximum:-66.00826000
    Units:decimal degrees
    Lat
    Latitude (decimal degrees) in NAD83 (2011) (Source: U.S. Geological Survey)
    Range of values
    Minimum:18.44383908
    Maximum:18.44454000
    Units:decimal degrees
    z
    Post-Processed Kinematic (PPK) Z-coordinates in NAD83(2011)/UTM Zone 20N referenced to PRVD02, in meters. A positive z value is the up direction. (Source: U.S. Geological Survey)
    Range of values
    Minimum:0.67
    Maximum:3.87
    Units:meters
    gcpUsed
    Indicates whether GCP was used to solve for EO, where 0 indicates not used and 1 indicates used. (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:1
    Description
    Location of each ground control point (GCP) placed within the camera's field of view (FOV) to solve for EO. (Source: U.S. Geological Survey) GCP locations within the camera's FOV
    islaverde_c2_20220814_EO.yml, islaverde_c2_20221209_EO.yml, and islaverde_c2_20230323_EO.yml
    YML files containing the solved EO from Step C in the Camera Calibration procedures outlined in Bruder and Brodie (2020). The ranges represent the min and max values across all three YML files. (Source: USGS)
    azimuth
    The horizontal direction the camera is pointing; positive clockwise (CW) from World Y Axis. (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:74.7596
    Maximum:74.9116
    Units:Angle units in degrees
    tilt
    The up/down tilt of the camera. 0 is the camera looking nadir, 90 is the camera looking at the horizon right side up, 180 is looking directly up, and so on. (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:72.9601
    Maximum:73.0184
    Units:Angle units in degrees
    roll
    The rotation around a horizontal axis going through the length of the lens of the camera. 0 degrees is a horizontal flat camera. Looking from behind the camera, counterclockwise (CCW) rotation of the camera would result in a positive roll. (Source: Bruder and Brodie (2020))
    Range of values
    Minimum:1.0903
    Maximum:1.1700
    Units:Angle units in degrees
    x
    X-coordinate in NAD83(2011)/UTM Zone 20N of camera position on rooftop. (Source: U.S. Geological Survey)
    Range of values
    Minimum:181808.1299
    Maximum:181808.4375
    Units:meters
    y
    Y-coordinate in NAD83(2011)/UTM Zone 20N of camera position on rooftop. (Source: U.S. Geological Survey)
    Range of values
    Minimum:2041937.0301
    Maximum:2041937.0507
    Units:meters
    z
    Z-coordinates referenced to PRVD02, GEOID18 of camera position on rooftop. (Source: U.S. Geological Survey)
    Range of values
    Minimum:21.8617
    Maximum:22.0545
    Units:meters
    Entity_and_Attribute_Overview:
    There are a total of 351 IO TIFF images for c2. The filename for each IO image is formatted as "c2_20220813_IO_####_############", where the number (####_############) is the original photo ID. There are 6 EO JPEG images for c2. The filename for each EO image is formatted as "islaverde_c2_YYYYMMDD_GCP_image_imagetype", where YYYYMMDD is the date and the imagetype is either 'raw' or 'annotated'. These images have EXIF and other imagery header information encoded within each file; see the process steps for more information.
    Entity_and_Attribute_Detail_Citation:
    The entity and attribute information were generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information.
    Entity_and_Attribute_Overview:
    To place the photos taken by the CoastCams into real world coordinates and to rectify them into a planar view, objects within the field of view of the camera must be located. The approximate elevation and position of the lenses in the CoastCam setup were measured with the PPK GPS. The CoastCams took pictures of the position of each target within the camera view. Each '_EO' zip folder contains the GCP CSV file, the resultant EO parameters in a YML file, and a 'raw' and 'annotated' image of the GCPs. CSV files (islaverde_c2_20220814_EO_GCPsurvey.csv, islaverde_c2_20221209_EO_GCPsurvey.csv, and islaverde_c2_20230323_EO_GCPsurvey.csv) with all the measurements were populated and GCP numbers were hand labeled on the annotated images (islaverde_c2_20220814_GCP_image_annotated.jpg, islaverde_c2_20221209_GCP_image_annotated.jpg, and islaverde_c2_20230323_GCP_image_annotated.jpg) so that the targets could be labeled correctly in Step B of the Camera Calibration steps in Bruder and Brodie (2020). There are 6 JPEG files per camera for a total of 12 JPEGs. Images have EXIF and other imagery header information encoded within each file; see the process steps for more information.
    Entity_and_Attribute_Detail_Citation:
    The entity and attribute information were generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Justin J. Birchler
    • Margaret L. Palmsten
    • Priscila Vargas-Babilonia
    • Eric Swanson
    • Mark L. Buckley
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Justin J. Birchler
    U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
    Physical Scientist
    600 4th Street South
    Saint Petersburg, FL
    USA

    727-502-8000 (voice)
    jbirchler@usgs.gov

Why was the data set created?

These data can be utilized to produce orthorectified products that can be viewed in a geographic information system (GIS) or other software to identify topographic and shallow-water bathymetric features. See the image processing toolbox developed by Bruder and Brodie (2020) for more information. To ensure that USGS-St. Petersburg data management protocols were followed, a USGS field activity number (FAN) was assigned for this survey; 2022-330-FA. Additional information about this FAN is available on the Coastal and Marine Geoscience Data System (CMGDS): https://cmgds.marine.usgs.gov/services/activity.php?fan=2022-330-FA.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 13-Aug-2022 (process 1 of 4)
    The CoastCams were used to take IO photos. This involves slightly tilting a printed checkerboard with 2.9-centimeter (cm) squares in various parts of the camera's field of view. An example image can be found in islaverde_c2_calibrationIOEO_exampleImagery.zip. There are a total of 351 IO images for c2 (islaverde_c2_20220813_IO.zip) of which 327 were used for the intrinsic calibration. The names of all, calibrated, and excluded images are listed in separate text files. The intrinsic calibration was completed using the MATLAB Computer Vision Toolbox Camera Calibrator application. The output from the calibration was used in step A in the Camera Calibration procedures outlined in Bruder and Brodie (2020). The resultant parameters are stored in a YML file located in islaverde_c2_20220813_IO.zip. Image file naming format follows "c2_20220813_IO_####_############", where c2 is the camera name, 20220813 is the date the images were taken (YYYYMMDD format), IO is Intrinsic Orientation, and ####_############ is the unique ID from the camera. Person who carried out this activity:
    Justin J. Birchler
    U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
    Physical Scientist
    600 4th Street South
    Saint Petersburg, FL
    USA

    727-502-8000 (voice)
    jbirchler@usgs.gov
    Data sources produced in this process:
    • c2_20220813_IO_####_############.tiff
    • islaverde_c2_20220813_IO.yml
    • c2_20220813_IO_wholeImageSet.txt
    • c2_20220813_IO_calibratedImageSet.txt
    • c2_20220813_IO_excludedImageSet.txt
    Date: 19-Oct-2023 (process 2 of 4)
    EO calibration GCPs were surveyed with Spectra Geospatial SP80 and SP90 DGPS PPK receivers. GCPs were collected three times after the camera had been operational (20220814, 20221209, and 20230323). To place the photos taken by the CoastCam into real world coordinates and to rectify them into a planar view, objects within the field of view of the camera must be located. To do so, the elevation and position of the lenses in the CoastCam setup were measured with the PPK GPS. Then, a 1.2-meter square target with white and black color in opposite quadrants was propped up to face the CoastCam setup. The bottom center of the target (between black and white) where it met the beach surface was measured with the PPK GPS equipment to collect ground control points. The CoastCam took pictures of the position of each target within the camera view (raw JPEG images). The images were then digitally combined so that all GCPs would appear on a single image. The survey locations of the GCPs in the CSV file were used to hand label the raw images to generate annotated images so that the targets could be labeled correctly in Step B of the Camera Calibration steps in Bruder and Brodie (2020). The pixel coordinates of each GCP within the raw image (hand-selected), solved in Step B of Bruder and Brodie (2020), the GPS positions from the CSV file, and the IO parameters in the IO YML file were used in Step C of the Camera Calibration steps in Bruder and Brodie (2020) to solve for the EO parameters. The resultant parameters for each of the three EO calibration dates are stored in a YML file located in "islaverde_c2_YYYYMMDD_EO.zip", where YYYYMMDD is the date for each EO GCP calibration (20220814, 20221209, and 20230323). Person who carried out this activity:
    Justin J. Birchler
    U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
    Physical Scientist
    600 4th Street South
    Saint Petersburg, FL
    USA

    727-502-8000 (voice)
    jbirchler@usgs.gov
    Data sources used in this process:
    • islaverde_c2_20220813_IO.yml
    • islaverde_c2_20220814_EO_GCPsurvey.csv
    • islaverde_c2_20221209_EO_GCPsurvey.csv
    • islaverde_c2_20230323_EO_GCPsurvey.csv
    • islaverde_c2_20220814_GCP_image_raw.jpg
    • islaverde_c2_20221209_GCP_image_raw.jpg
    • islaverde_c2_20230323_GCP_image_raw.jpg
    Data sources produced in this process:
    • islaverde_c2_20220814_GCP_image_annotated.jpg
    • islaverde_c2_20221209_GCP_image_annotated.jpg
    • islaverde_c2_20230323_GCP_image_annotated.jpg
    • islaverde_c2_20220814_EO.yml
    • islaverde_c2_20221209_EO.yml
    • islaverde_c2_20230323_EO.yml
    Date: 01-Mar-2024 (process 3 of 4)
    All intrinsic calibration images were given additional information required by the USGS to the exchangeable image file format (EXIF) and other imagery headers using PyExifTool Python library (https://pypi.org/project/PyExifTool/, version: 0.5.5). The following describes the Python dictionary object used, with each entry in the dictionary being a tag-value pair: tags = { 'Copyright': 'Public Domain', 'CopyrightNotice': 'Public Domain - please credit U.S. Geological Survey', 'Artist': 'USGS SPCMSC', 'Make': 'FLIR','Model': 'BlackFly S GigE 5MP','UserComment': UserComment, 'GPSLatitude': '18.443818', 'GPSLongitude': '-66.012237', 'GPSMapDatum': 'EPSG:6318 (NAD83_National_Spatial_Reference_System_2011)', 'GPSLatitudeRef': 'N', 'GPSLongitudeRef': 'W', 'GPSDateStamp': '2022-08-13', 'Credit': 'U.S. Geological Survey', 'Contact': 'gs-g-spcmsc_data_inquiries@usgs.gov', 'UsageTerms': "Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty", 'AttributionURL': 'https://doi.org/10.5066/P13DOBTM', 'ExternalMetadataLink': 'https://www.usgs.gov/pir/api/identifiers/USGS:09ee6c33-4488-48b1-85cd-a5d1374e5182', 'Contributor': 'Justin J. Birchler, Margaret L. Palmsten, Priscila Vargas Babilonia, Eric Swanson, Mark L. Buckley', 'XMP-photoshop:Credit': 'U.S. Geological Survey', 'iptcCore:CreatorWorkEmail': 'gs-g-spcmsc_data_inquiries@usgs.gov','Rights': 'Public Domain', 'Keywords' : "Isla Verde, San Juan, Puerto Rico, CoastCam, USGS, intrinsic calibration, snapshot, remote sensing, ground control point", 'ImageDescription': 'This image was captured from a stationary mounted camera at the Isla Verde camera site (station name: islaverde) camera 2 in San Juan, Puerto Rico. Field Activity Number (FAN): 2022-330-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-330-FA), 'Description': 'This image was captured from a stationary mounted camera at the Isla Verde camera site (station name: islaverde) camera 2 in San Juan, Puerto Rico. Field Activity Number (FAN): 2022-330-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-330-FA)'}. If there were errors generating keywords with the Python script, additional keywords were added to the imagery headers for all of the IO images using the following command: 'exiftool -sep ", " -iptc:keywords="Isla Verde, San Juan, Puerto Rico, CoastCam, USGS, intrinsic calibration" *.tiff'. The UserComment EXIF metadata field was used to store the camera intrinsics and extrinsics in the image metadata. The UserComment has a nested dictionary structure. The highest-level dictionary contains two nested dictionaries as well as a note explaining the structure of the UserComment field. One nested dictionary contains the actual intrinsic and extrinsic data variables. The other nested dictionary contains text descriptions for each of the variables in the dictionary of data variables. To read out the imagery header information to a CSV file the command is: 'exiftool -csv *.tiff > allheaders.csv'. Specific tags can also be specified with this command. Person who carried out this activity:
    Justin J. Birchler
    U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
    Physical Scientist
    600 4th Street South
    Saint Petersburg, FL
    USA

    727-502-8000 (voice)
    jbirchler@usgs.gov
    Data sources produced in this process:
    • c2_20220813_IO_####_############.tiff
    Date: 19-Oct-2023 (process 4 of 4)
    All extrinsic calibration ground control point images were given additional information required by the USGS to the exchangeable image file format (EXIF) and other imagery headers using PyExifTool Python library (https://pypi.org/project/PyExifTool/, version: 0.5.5). The following describes the Python dictionary object used, with each entry in the dictionary being a tag-value pair: tags = { 'Copyright': 'Public Domain', 'CopyrightNotice': 'Public Domain - please credit U.S. Geological Survey', 'Artist': 'USGS SPCMSC', 'Make': 'FLIR', 'Model': 'BlackFly S GigE 5MP','UserComment': UserComment, 'GPSLatitude': '18.443818', 'GPSLongitude': '-66.012237', 'GPSMapDatum': 'EPSG:6318 (NAD83_National_Spatial_Reference_System_2011)', 'GPSLatitudeRef': 'N', 'GPSLongitudeRef': 'W', 'Credit': 'U.S. Geological Survey', 'Contact': 'gs-g-spcmsc_data_inquiries@usgs.gov', 'UsageTerms': "Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty", 'AttributionURL': 'https://doi.org/10.5066/P13DOBTM', 'ExternalMetadataLink':'https://www.usgs.gov/pir/api/identifiers/USGS:09ee6c33-4488-48b1-85cd-a5d1374e5182', 'Contributor': 'Justin J. Birchler, Margaret L. Palmsten, Priscila Vargas Babilonia, Eric Swanson, Mark L. Buckley', 'XMP-photoshop:Credit': 'U.S. Geological Survey', 'iptcCore:CreatorWorkEmail': 'gs-g-spcmsc_data_inquiries@usgs.gov','Rights': 'Public Domain', 'Keywords' : "Isla Verde, San Juan, Puerto Rico, CoastCam, USGS, extrinsic calibration, snapshot, remote sensing, ground control point", 'ImageDescription': 'This image was captured from a stationary mounted camera at Isla Verde camera site (station name: islaverde) camera 2 in San Juan, Puerto Rico. Field Activity Number (FAN): 2022-330-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-330-FA)', 'Description': 'This image was captured from a stationary mounted camera at Isla Verde camera site (station name: islaverde) camera 2 in San Juan, Puerto Rico. Field Activity Number (FAN): 2022-330-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-330-FA)'}. If there were errors generating keywords with the Python script, additional keywords were added to the imagery headers for all of the IO images using the following command: 'exiftool -sep ", " -iptc:keywords="Isla Verde, San Juan, Puerto Rico, CoastCam, USGS, extrinsic calibration" *.jpg'. The only tag which can have a different value from image to image is GPSDateStamp. Depending on the date the photo was captured, the value in the GPSDatestamp tag changes. The UserComment EXIF metadata field was used to store the camera intrinsics and extrinsics in the image metadata. The UserComment has a nested dictionary structure. The highest-level dictionary contains two nested dictionaries as well as a note explaining the structure of the UserComment field. One nested dictionary contains the actual intrinsic and extrinsic data variables. The other nested dictionary contains text descriptions for each of the variables in the dictionary of data variables. To read out the imagery header information to a CSV file the command is: 'exiftool -csv *.jpg > allheaders.csv'. Specific tags can also be specified with this command. Person who carried out this activity:
    Justin J. Birchler
    U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
    Physical Scientist
    600 4th Street South
    Saint Petersburg, FL
    USA

    727-502-8000 (voice)
    jbirchler@usgs.gov
    Data sources produced in this process:
    • islaverde_c2_20220813_GCP_image_raw.jpg
    • islaverde_c2_20221209_GCP_image_raw.jpg
    • islaverde_c2_20230323_GCP_image_raw.jpg
    • islaverde_c2_20220813_GCP_image_annotated.jpg
    • islaverde_c2_20221209_GCP_image_annotated.jpg
    • islaverde_c2_20230323_GCP_image_annotated.jpg
  3. What similar or related data should the user be aware of?
    Bruder, Brittany L., and Brodie, Katherine L., 20200909, CIRN Quantitative Coastal Imaging Toolbox: Elsevier SoftwareX, Online.

    Online Links:


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    EO calibration ground control points (GCPs) were surveyed with Spectra Geospatial SP80 and SP90 Differential Global Positioning System (DGPS) Post-Processed Kinematic (PPK) receivers. Calibration success can be examined using the CIRN QCIT Toolbox (Bruder and Brodie, 2020) where parameters azimuth, tilt, and roll have errors less than 2 degrees. Accuracy of the extrinsic calibration was also tied to human ability to locate targets in the imagery. The camera systems were liable to move over time via wind, wear, and human interactions cleaning the camera - all of which may change the camera calibration parameters. The parameters are stored in YML files named with the date first active.
  2. How accurate are the geographic locations?
    PPK equipment with decimeter horizontal accuracy collected in field activity 2022-330-FA were used to validate the extrinsic camera calibration. The precise locations of the targets are used in the CIRN QCIT Toolbox steps B and C (Bruder and Brodie, 2020). Horizontal coordinates are referenced to the North American Datum of 1983 (National Spatial Reference System 2011) Universal Transverse Mercator Zone 20 North (NAD83(2011)/UTM Zone 20N) coordinate system.
  3. How accurate are the heights or depths?
    PPK equipment with centimeter vertical accuracy collected in field activity 2022-330-FA were used to validate the extrinsic camera calibration. The precise locations of the targets are used in the CIRN QCIT Toolbox steps B and C (Bruder and Brodie, 2020). Vertical positions are referenced to the Puerto Rico Vertical Datum of 2002 (PRVD02) coordinate system.
  4. Where are the gaps in the data? What is missing?
    All calibration images are provided even if not all images are necessary for calibrating the camera.
  5. How consistent are the relationships among the observations, including topology?
    The camera systems installed (FLIR BlackFly S GigE 5MP) had intrinsic and extrinsic calibration processes. The IO calibration process was completed on 20220813 and consists of a total of 351 images for c2. Of the 351 images for c2, 327 images that collectively covered the entire image frame were selected to solve for the intrinsic calibration. These photos are listed in c2_20220813_IO_calibratedImageSet.txt. These photos are used in the CIRN QCIT Toolbox steps A through C. The EO process was completed on 20220814, 20221209, and 20230323 and each date consists of a YML file of resultant EO parameters, a comma-separated values (CSV) file of GCP locations and description, and two Joint Photographic Experts Group (JPEG) images, one labeled as 'raw' and the other as 'annotated'. The extrinsic calibration uses one "snap" photo with GCP targets that have pre-established location information. Results of the intrinsic and extrinsic calibrations are stored in separate YML files (islaverde_c2_20220813_IO.yml, islaverde_c2_20220814_EO.yml, islaverde_c2_20221209_EO.yml, and islaverde_c2_20230323_EO.yml).

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints No access constraints. Please see 'Distribution Information' for details.
Use_Constraints These data are marked with a Creative Common CC0 1.0 Universal License. These data are in the public domain and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations.
  1. Who distributes the data set? (Distributor 1 of 1)
    USGS SPCMSC Data Management Group
    U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
    600 4th Street South
    St. Petersburg, Florida
    USA

    727-502-8000 (voice)
    gs-g-spcmsc_data_inquiries@usgs.gov
  2. What's the catalog number I need to order this data set? c2_20220813_IO_####_############.tiff, islaverde_c2_20220814_EO.yml, islaverde_c2_20220814_EO_GCPsurvey.csv, islaverde_c2_20220814_GCP_image_annotated.jpg, islaverde_c2_20220814_GCP_image_raw.jpg, islaverde_c2_20221209_EO.yml, islaverde_c2_20221209_EO_GCPsurvey.csv, islaverde_c2_20221209_GCP_image_annotated.jpg, islaverde_c2_20221209_GCP_image_raw.jpg, islaverde_c2_20230323_EO.yml, islaverde_c2_20230323_EO_GCPsurvey.csv, islaverde_c2_20230323_GCP_image_annotated.jpg, and islaverde_c2_20230323_GCP_image_raw.jpg
  3. What legal disclaimers am I supposed to read?
    This publication was prepared by an agency of the United States Government. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 21-Mar-2025
Metadata author:
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
Attn: USGS SPCMSC Data Management
600 4th Street South
Saint Petersburg, FL
United States

727-502-8000 (voice)
gs-g-spcmsc_data_inquiries@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

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