USGS CoastCam at Isla Verde, Puerto Rico: 2018-2019 Intrinsic and Extrinsic Calibration Data

Frequently anticipated questions:

• What does this data set describe?
  1. How might this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
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  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Harrison, Shawn R., Buckley, Mark L., Mújica, Paco López, Logan, Joshua, Cheriton, Olivia, Viehman, T. Shay, Storlazzi, Curt D., Birchler, Justin J., Palmsten, Margaret L., Swanson, Eric, and Johnson, Emily L., 20240510, USGS CoastCam at Isla Verde, Puerto Rico: 2018-2019 Intrinsic and Extrinsic Calibration Data:.

   This is part of the following larger work.
   Harrison, Shawn R., Buckley, Mark L., Mújica, Paco López, Logan, Joshua, Cheriton, Olivia, Viehman, T. Shay, Storlazzi, Curt D., Birchler, Justin J., Palmsten, Margaret L., Swanson, Eric, and Johnson, Emily L., 20240510, USGS CoastCam at Isla Verde, Puerto Rico: 2018-2019 Calibration and GNSS Topography Survey Data: U.S. Geological Survey data release doi:10.5066/P13RKCPN, U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida.

   Online Links:

   • https://doi.org/10.5066/P13RKCPN

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -66.012235
   East_Bounding_Coordinate: -66.007598
   North_Bounding_Coordinate: 18.446538
   South_Bounding_Coordinate: 18.443801
   

3. What does it look like?

   IslaVerdePR_c1_20181106_calibrationIOEO_exampleImagery.zip (JPEG)

   Zip file containing the following example Joint Photographic Experts Group (JPEG) images: A) Image used in intrinsic orientation (IO) calibration (IslaVerdePR_c1_20181105_028.jpg) and B) Image used in extrinsic orientation (EO) calibration (IslaVerdePR_c1_20181106_GCP_image_annotated.jpg) and the target numbers for use in the Coastal Imaging Research Network (CIRN) Toolbox that correspond to the numbers in the IslaVerdePR_c1_20181106_EO_GCPsurvey.csv (file available in IslaVerdePR_c1_20181106_EO.zip).

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: 05-Nov-2018

   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 0.001
      Ordinates (y-coordinates) are specified to the nearest 0.001
      Planar coordinates are specified in meters
      The horizontal datum used is NAD83 (National Spatial Reference System 2011) (EPSG:6318).
      The ellipsoid used is GRS 1980 (EPSG:7019).
      The semi-major axis of the ellipsoid used is 6378137.0.
      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 (EPSG:1123), derived using GEOID12B

      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?

   IslaVerdePR_c1_20181105_IO.yaml

   YAML file containing the solved intrinsic orientation (IO) 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

   c0U

   U component of principal point (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	1224.3606803230775
   Maximum:	1224.3606803230775
   Units:	pixel

   c0V

   V component of principal point (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	1059.3622411047677
   Maximum:	1059.3622411047677
   Units:	pixel

   fx

   X component of focal length in pixels (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	2404.4725383416639
   Maximum:	2404.4725383416639
   Units:	pixels

   fy

   Y component of focal length in pixels (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	2404.4283000657956
   Maximum:	2404.4283000657956
   Units:	pixels

   d1

   First radial distortion coefficient (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	-0.20416511584613148
   Maximum:	-0.20416511584613148

   d2

   Second radial distortion coefficient (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	0.13762529048465244
   Maximum:	0.13762529048465244

   d3

   Third radial distortion coefficient (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	0
   Maximum:	0

   t1

   First tangential distortion coefficient (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	0.00027957584250898711
   Maximum:	0.00027957584250898711

   t2

   Second tangential distortion coefficient (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	-0.0007302982621077462
   Maximum:	-0.0007302982621077462

   IslaVerdePR_c1_20181106_EO_GCPsurvey.csv

   CSV file 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 IslaVerdePR_c1_20181106_EO_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:	3
   Maximum:	9

   ID

   Number of each GCP that can be found in IslaVerdePR_c1_20181106_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) Labeled arg#, numbered 3 through 9.

   Northing (UTM)

   Northing coordinate of data point relative to the NAD83 (National Spatial Reference System 2011) reference frame (EPSG:6318), projected in the Universal Transverse Mercator (UTM) Zone 20 North coordinate system (EPSG:26920), in units of meters (Source: U.S. Geological Survey)

   Range of values
   Minimum:	2041939.198
   Maximum:	2041972.105
   Units:	meters

   Easting (UTM)

   Easting coordinate of data point relative to the NAD83 (National Spatial Reference System 2011) reference frame (EPSG:6318), projected in the Universal Transverse Mercator (UTM) Zone 20 North coordinate system (EPSG:26920), in units of meters (Source: U.S. Geological Survey)

   Range of values
   Minimum:	181838.778
   Maximum:	182106.148
   Units:	meters

   z

   Orthometric height of data point in meters relative to the Puerto Rico Vertical Datum of 2002 (EPSG:1123), derived using GEOID12B (Source: U.S. Geological Survey)

   Range of values
   Minimum:	1.878
   Maximum:	2.832
   Units:	meters

   Lat

   Latitude of data point in decimal degrees relative to the NAD83 (National Spatial Reference System 2011) reference frame (EPSG:6318) (Source: U.S. Geological Survey)

   Range of values
   Minimum:	18.44385672
   Maximum:	18.44418039
   Units:	decimal degrees

   Lon

   Longitude of data point in decimal degrees relative to the NAD83 (National Spatial Reference System 2011) reference frame (EPSG:6318) (Source: U.S. Geological Survey)

   Range of values
   Minimum:	-66.01193053
   Maximum:	-66.00940302
   Units:	decimal degrees

   gcpUsed

   Indicates whether GCP was used to solve for extrinsic orientation. (Source: U.S. Geological Survey)

   Value	Definition
   0	Not used
   1	Used

   Description

   Location of each ground control point (GCP) placed within the camera's field of view (FOV) to solve for extrinsic orientation. (Source: U.S. Geological Survey) GCP locations within the camera's FOV

   IslaVerdePR_c1_20181106_EO.yaml

   YAML file containing the solved extrinsic orientation (EO) from Step C in the Camera Calibration procedures outlined in Bruder and Brodie (2020). (Source: USGS)

   x

   X-coordinate of camera position relative to the NAD83 (National Spatial Reference System 2011) reference frame (EPSG:6318), projected in the Universal Transverse Mercator (UTM) Zone 20 North coordinate system (EPSG:26920), in units of meters. (Source: U.S. Geological Survey)

   Range of values
   Minimum:	181806.116
   Maximum:	181806.116
   Units:	meters

   y

   Y-coordinate of camera position relative to the NAD83 (National Spatial Reference System 2011) reference frame (EPSG:6318), projected in the Universal Transverse Mercator (UTM) Zone 20 North coordinate system (EPSG:26920), in units of meters. (Source: U.S. Geological Survey)

   Range of values
   Minimum:	2041936.932
   Maximum:	2041936.932
   Units:	meters

   z

   Z-coordinate of camera position relative to the Puerto Rico Vertical Datum of 2002 (EPSG:1123), derived using GEOID12B in units of meters. (Source: U.S. Geological Survey)

   Range of values
   Minimum:	21.914
   Maximum:	21.914
   Units:	meters

   azimuth

   The horizontal direction the camera is pointing and positive clockwise (CW) from World Y Axis. (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	71.696102
   Maximum:	71.696102
   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, and 180 is looking directly up. (Source: Bruder and Brodie (2020))

   Range of values
   Minimum:	70.910957
   Maximum:	70.910957
   Units:	Angle units in degrees

   roll

   The side-to-side roll 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:	-1.331876
   Maximum:	-1.331876
   Units:	Angle units in degrees

   Entity_and_Attribute_Overview:

   There are a total of 58 intrinsic orientation (IO) JPEG images. The filename for each IO image is formatted as "IslaVerdePR_c1_20181105_###", where 20181105 is the date that the images were taken (YYYYMMDD format) and the number (###) is the original photo ID. There are a total of 2 extrinsic orientation (EO) JPEG images. The filename for each EO image is formatted as "IslaVerdePR_c1_20181106_IslaVerdePR_GCP_image_imagetype", where 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 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. The elevation and position of the lenses in the CoastCam setup were measured with the PPK GNSS. The CoastCam took pictures of the position of each target within the camera view. The '_EO' zip folder contains the GCP CSV file, the resultant EO parameters in a YAML file, and a 'raw' and 'annotated' image of the GCPs. The CSV file (IslaVerdePR_c1_20181106_EO_GCPsurvey.csv) with all the measurements were populated and GCP numbers were hand labeled on the annotated image (IslaVerdePR_c1_20181106_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 a total of 2 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)
   • Shawn R. Harrison
   • Mark L. Buckley
   • Paco López Mújica
   • Joshua Logan
   • Olivia Cheriton
   • T. Shay Viehman
   • Curt D. Storlazzi
   • Justin J. Birchler
   • Margaret L. Palmsten
   • Eric Swanson
   • Emily L. Johnson
2. Who also contributed to the data set?
3. To whom should users address questions about the data?
   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

Why was the data set created?

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: 05-Nov-2018 (process 1 of 4)

   The CoastCam was used to take IO photos. This involves slightly tilting a printed checkerboard with 30-millimeter (mm) squares in various parts of the cameras field of view. An example image can be found in IslaVerdePR_c1_20181106_calibrationIOEO_exampleImagery.zip. There are a total of 58 IO images (IslaVerdePR_c1_20181105_IO.zip) of which 55 were used for the intrinsic calibration. The 55 images were used in step A in the Camera Calibration procedures outlined in Bruder and Brodie (2020). The resultant parameters are stored in a YAML file located in IslaVerdePR_c1_20181105_IO.zip. Image file naming format follows “IslaVerdePR_c1_20181105_###”, 20181105 is the date that the images were taken (YYYYMMDD format) and ### is the original unique ID from the camera. Person who carried out this activity:
   

   Joshua Logan

   U.S. Geological Survey, Pacific Coastal and Marine Science Center

   2885 Mission Street

   Santa Cruz, CA
   

   USA

   831-460-7519 (voice)

   jlogan@usgs.gov

   Data sources produced in this process:

   • IslaVerdePR_c1_20181105_###.jpg
   • IslaVerdePR_c1_20181105_IO.yaml

   Date: 06-Nov-2018 (process 2 of 4)

   Extrinsic orientation (EO) calibration ground control points (GCPs) were surveyed with a Trimble R10 survey-grade dual-frequency GNSS receiver set to record raw GNSS observables in Post-Processed Kinematic (PPK) mode. 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. Multiple large square targets painted white and black in opposite quadrants were laid flat on the beach to be visible by the CoastCam. The GNSS receiver was placed on a fixed-height survey rod and set to record observations for one minute at each ground control point at the center of each target (between black and white). After the survey, concurrent GNSS observations were downloaded from the National Geodetic Survey (NGS) Continuously Operating Base Station (CORS), ZSU4, located approximately 2.5 kilometers from the study area. These data were then used to post-process the GNSS measurements using the Trimble Business Center ver. 5.00 software package. The CoastCam took pictures of the position of each target within the camera view (raw JPEG image). The CSV file was 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 images, solved in Step B of Bruder and Brodie (2020), the GNSS positions from the CSV files, and the IO parameters in the IO YAML 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 the EO calibration are stored in a YAML file located in “IslaVerdePR_c1_20181106_EO.zip”. Person who carried out this activity:
   

   Joshua Logan

   U.S. Geological Survey, Pacific Coastal and Marine Science Center

   2885 Mission Street

   Santa Cruz, CA
   

   USA

   831-460-7519 (voice)

   jlogan@usgs.gov

   Data sources used in this process:

   • IslaVerdePR_c1_20181105_IO.yaml
   • IslaVerdePR_c1_20181106_EO_GCPsurvey.csv
   • IslaVerdePR_c1_20181106_GCP_image_raw.jpg

   Data sources produced in this process:

   • IslaVerdePR_c1_20181106_GCP_image_annotated.jpg
   • IslaVerdePR_c1_20181106_EO.yaml

   Date: 04-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). All intrinsic photos were given EXIF header information in the directory with all the photos by assigning all the tags in a Python dictionary object to each photo using PyExifTool. The following describes the Python dictionary object 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': 'BFLY-PGE-50S5C-C','UserComment': ‘The following nested dictionary contains the cameras intrinsic and extrinsic calibration parameters. Intrinsic camera parameters use the Brown distortion model (Brown, D.C., 1971. "Close-Range Camera Calibration." Photogrammetric Engineering), using the Camera Calibration Toolbox for Matlab by Jean-Yves Bouguet (https://doi.org/10.22002/D1.20164). Extrinsic calibration parameters were computed using the CIRN Quantitative Coastal Imaging Toolbox (Bruder, B. L. and Brodie, K. L., 2020, "CIRN Quantitative Coastal Imaging Toolbox.", SoftwareX 12 (10052), https://doi.org/10.1016/j.softx.2020.100582.)’, 'GPSLatitude': '18.44381759', 'GPSLongitude': '-66.01223722', 'GPSMapDatum': 'EPSG:6318 (NAD83_National_Spatial_Reference_System_2011)', 'GPSLatitudeRef': 'N', 'GPSLongitudeRef': 'W', 'GPSDateStamp': '2018-11-05', '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/P13RKCPN', 'ExternalMetadataLink': 'https://www1.usgs.gov/pir/api/identifiers/USGS:e3ad3264-3a27-45ef-b316-311d4499874e', 'Contributor': 'Shawn R. Harrison, Mark L. Buckley, Paco López Mújica, Josh Logan, Olivia Cheriton, T. Shay Viehman, Curt D. Storlazzi, Justin J. Birchler, Margaret L. Palmsten, Eric Swanson, Emily L. Johnson', 'XMP-photoshop:Credit': 'U.S. Geological Survey', 'iptcCore:CreatorWorkEmail': 'gs-g-spcmsc_data_inquiries@usgs.gov','Rights': 'Public Domain', 'Keywords' : "Isla Verde, Puerto Rico, CoastCam, USGS, intrinsic calibration, snapshot, remote sensing, ground control point", 'ImageDescription': 'This image was captured from a stationary mounted camera at Isla Verde, Puerto Rico. Field Activity Number: 2018-670-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-670-FA)', 'Description': 'This image was captured from a stationary mounted camera at Isla Verde, Puerto Rico. Field Activity Number: 2018-670-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-670-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, Puerto Rico, CoastCam, USGS, intrinsic calibration" *.jpg'. 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 may be specified with this command, if preferred. Person who carried out this activity:
   

   Justin J. Birchler

   U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center

   Physcical Scientist

   600 4th Street South

   Saint Petersburg, FL
   

   USA

   727-502-8019 (voice)

   jbirchler@usgs.gov

   Data sources produced in this process:

   • IslaVerdePR_c1_20181105_###.jpg

   Date: 04-Mar-2024 (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). All extrinsic photos were given EXIF header information in the directory with all the photos by assigning all the tags in a Python dictionary object to each photo using PyExifTool. The following describes the Python dictionary object 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': 'BFLY-PGE-50S5C-C','UserComment': ‘The following nested dictionary contains the cameras intrinsic and extrinsic calibration parameters. Intrinsic camera parameters use the Brown distortion model (Brown, D.C., 1971. "Close-Range Camera Calibration." Photogrammetric Engineering), using the Camera Calibration Toolbox for Matlab by Jean-Yves Bouguet (https://doi.org/10.22002/D1.20164). Extrinsic calibration parameters were computed using the CIRN Quantitative Coastal Imaging Toolbox (Bruder, B. L. and Brodie, K. L., 2020, "CIRN Quantitative Coastal Imaging Toolbox.", SoftwareX 12 (10052), https://doi.org/10.1016/j.softx.2020.100582.)’, 'GPSLatitude': '18.44381759', 'GPSLongitude': '-66.01223722', '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/P13RKCPN', 'ExternalMetadataLink':'https://www1.usgs.gov/pir/api/identifiers/USGS:e3ad3264-3a27-45ef-b316-311d4499874e', 'Contributor': 'Shawn R. Harrison, Mark L. Buckley, Paco López Mújica, Josh Logan, Olivia Cheriton, T. Shay Viehman, Curt D. Storlazzi, Justin J. Birchler, Margaret L. Palmsten, Eric Swanson, Emily L. Johnson', 'XMP-photoshop:Credit': 'U.S. Geological Survey', 'iptcCore:CreatorWorkEmail': 'gs-g-spcmsc_data_inquiries@usgs.gov','Rights': 'Public Domain', 'Keywords' : "Isla Verde, Puerto Rico, CoastCam, USGS, intrinsic calibration, snapshot, remote sensing, ground control point", 'ImageDescription': 'This image was captured from a stationary mounted camera at Isla Verde, Puerto Rico. Field Activity Number: 2018-670-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-670-FA)', 'Description': 'This image was captured from a stationary mounted camera at Isla Verde, Puerto Rico. Field Activity Number: 2018-670-FA (https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-670-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, 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 may be specified with this command, if preferred. 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

   727-502-8019 (voice)

   jbirchler@usgs.gov

   Data sources produced in this process:

   • IslaVerdePR_c1_20181106_GCP_image_raw.jpg
   • IslaVerdePR_c1_20181106_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:

   • https://doi.org/10.1016/j.softx.2020.100582

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

1. How well have the observations been checked?
   Extrinsic orientation (EO) calibration ground control points (GCPs) were surveyed with a Trimble R10 survey-grade dual-frequency global navigation satellite system (GNSS) receiver set to record raw GNSS observations in Post-Processed Kinematic (PPK) mode. Calibration success can be examined using the CIRN 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 latest parameters are stored in the YAML files named with the date first active.
2. How accurate are the geographic locations?
   PPK equipment collected in field activity 2018-670-FA were used to validate the extrinsic camera calibration using corrections referenced to the National Geodetic Survey (NGS) Continuously Operating Base Station (CORS), ZSU4, located approximately 2.5 kilometers from the study area(https://geodesy.noaa.gov/CORS/). The mean reported horizontal precision of these measurements was 0.020 meters (with a standard deviation of 0.003 meters). The magnitude of additional errors resulting from uncertainty in the base station reference position, errors in tripod centering, and antenna height measurement errors are unknown. The precise locations of the targets are used in the CIRN Quantitative Coastal Imaging 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, with a resolution of 1 meter.
3. How accurate are the heights or depths?
   PPK equipment collected in field activity 2018-670-FA were used to validate the extrinsic camera calibration using corrections referenced to the National Geodetic Survey (NGS) Continuously Operating Base Station (CORS), ZSU4, located approximately 2.5 kilometers from the study area. The mean reported vertical precision of these measurements was 0.045 meters (with a standard deviation of 0.011 meters). The magnitude of additional errors resulting from uncertainty in the base station reference position, errors in tripod centering, and antenna height measurement errors are unknown. The precise locations of the targets are used in the CIRN Quantitative Coastal Imaging Toolbox steps B and C (Bruder and Brodie, 2020). Vertical positions are referenced to the Puerto Rico Vertical Datum of 2002 (PRVD02; EPSG:1123), derived using GEOID12B, coordinate system, with a resolution of 0.001 meters.
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 system installed (FLIR BFLY-PGE-50S5C-C) had an intrinsic and extrinsic calibration process. The EO process was completed on 20181106 and consists of a YAML file of resultant EO parameters, a comma-separated values (CSV) file of GCP locations and description, and two JPEG images, one labeled as 'raw' and the other as 'annotated'. The intrinsic orientation (IO) calibration consists of a total of 58 images and the extrinsic calibration uses one “timex” photo with GCP targets that have pre-established location information. Of the 58 photos, 55 images that collectively covered the entire image frame were selected to solve for the intrinsic calibration. The 3 images excluded were: IslaVerdePR_c1_20181105_021.jpg, IslaVerdePR_c1_20181105_112.jpg and IslaVerdePR_c1_20181105_164.jpg. These are used in the CIRN Toolbox steps A through C. Results of the intrinsic and extrinsic calibrations are stored in separate YAML files (IslaVerdePR_c1_20181105_IO.yaml, IslaVerdePR_c1_20181106_EO.yaml).

How can someone get a copy of the data set?

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? IslaVerdePR_c1_20181105_IO.yaml, IslaVerdePR_c1_20181105_###.jpg, IslaVerdePR_c1_20181106_EO.yaml, IslaVerdePR_c1_20181106_EO_GCPsurvey.csv, IslaVerdePR_c1_20181106_GCP_image_annotated.jpg, IslaVerdePR_c1_20181106_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?
   • Availability in digital form:

     Data format:	JPEG, YAML, comma-delimited text
     Network links:	https://coastal.er.usgs.gov/data-release/doi-P13RKCPN/data/IslaVerdePR_c1_20181105_IO.zip https://coastal.er.usgs.gov/data-release/doi-P13RKCPN/data/IslaVerdePR_c1_20181106_EO.zip https://coastal.er.usgs.gov/data-release/doi-P13RKCPN/data/IslaVerdePR_c1_calibrationIOEO_exampleimagery.zip

   • Cost to order the data: None

Who wrote the metadata?

Dates:

Last modified: 10-May-2024

Metadata author:

USGS SPCMSC Data Management Group

U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center

600 4th Street South

Saint Petersburg, FL

USA

727-502-8000 (voice)

gs-g-spcmsc_data_inquiries@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)