gov.noaa.nmfs.inport:39441
eng
UTF8
dataset
National Centers for Coastal Ocean Science
resourceProvider
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
pointOfContact
2024-02-29T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
Benthic Habitats of Puerto Rico and the U.S. Virgin Islands;Photomosaic of Puerto Rico (Isla de Desecheo), 1999
pr_isla_desecheo_photo
2001-05-01
publication
NOAA/NMFS/EDM
39441
https://www.fisheries.noaa.gov/inport/item/39441
WWW:LINK-1.0-http--link
Full Metadata Record
View the complete metadata record on InPort for more information about this dataset.
information
Kendall, Matt
matt.kendall@noaa.gov
principalInvestigator
http://ccma.nos.noaa.gov/products/biogeography/benthic/data/
WWW:LINK-1.0-http--link
Citation URL
Online Resource
download
http://coastalscience.noaa.gov/datasets/ccma/biogeo/benthic/mosaic/zip/desecheo.zip
WWW:LINK-1.0-http--link
Citation URL
Online Resource
download
Habitat maps of Puerto Rico and the U.S. Virgin Islands were created by visual interpretation of aerial photographs using the Habitat Digitizer Extension. Aerial photographs are valuable tools for natural resource managers and researchers since they provide an excellent record of the location and extent of habitats. However,spatial distortions in aerial photographs due to such factors as camera angle, lens characteristics, and relief displacement must be accounted for during analysis to prevent incorrect measurements of area, distance, and other spatial parameters. These distortions of scale within an image can be removed through orthorectification. During orthorectification, digital scans of aerial photos are subjected to algorithms that eliminate each source of spatial distortion. The result is a georeferenced digital mosaic of several photographs with uniform scale throughout the mosaic. Features near land are generally georeferenced with greater accuracy while the accuracy of features away from land is generally not as good. Where no land is in the original photographic frame only kinematic GPS locations and image tie points were used to georeference the images. After the orthorectified mosaics were created, photointerpreters were able to accurately and reliably delineate boundaries of features in the imagery as they appear on the computer monitor.
The National Ocean Service is conducting research to digitally map biotic resources and coordinate a long-term monitoring program that can detect and predict change in U.S. coral reefs, and their associated habitats and biological communities.
National Geophysical Data Center
completed
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
pointOfContact
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
custodian
notPlanned
Remotely Sensed Imagery/Photos
SAV
aerial photography
benthic
coral
habitat
mangrove
oceans
reef
seagrass
theme
Desecheo
Puerto Rico
U.S. Exclusive Economic Zone
place
DOC/NOAA/NOS/NCCOS > National Centers for Coastal Ocean Science, National Ocean Service, NOAA, U.S. Department of Commerce
dataCentre
Global Change Master Directory (GCMD) Data Center Keywords
2017-04-24
publication
8.5
VI_PR_photo
project
InPort
otherRestrictions
Cite As: National Centers for Coastal Ocean Science, [Date of Access]: Benthic Habitats of Puerto Rico and the U.S. Virgin Islands;Photomosaic of Puerto Rico (Isla de Desecheo), 1999 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/39441.
NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
otherRestrictions
Access Constraints: none
otherRestrictions
Use Constraints: none
otherRestrictions
Distribution Liability: Data are not to be used for navigation.
unclassified
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
39441
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/nccos/dmp/pdf/39441.pdf
WWW:LINK-1.0-http--link
NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
grid
eng; US
environment
oceans
MrSID Compression, orthorectified aerialphotos
-67.3
-67.27
18.21
18.23
| Currentness: Publication Date
1999-02-01
| Currentness: Publication Date
1999-03-01
| Currentness: Publication Date
1999-12-01
false
eng
false
MrSID Compressed orthorectified images; UTM Zone 19.
SID-MrSID/Multiresolution Seamless Image DB
NCCOS Scientific Data Coordinator
NCCOS.data@noaa.gov
distributor
http://coastalscience.noaa.gov/datasets/ccma/biogeo/benthic/mosaic/zip/desecheo.zip
WWW:LINK-1.0-http--link
http://coastalscience.noaa.gov/datasets/ccma/biogeo/benthic/mosaic/zip/desecheo.zip
Downloadable Data
download
dataset
Horizontal Positional Accuracy
Horizontal accuracy was determined by solution of Socet Set generated model (RMS less than 1) and by comparison to independent ground control data. x=4.3 +/-30.0, y=9.5 +/-36.4 values are in meters +/- standard deviation
Completeness Measure
Cloud Cover: 2
Completeness Report
No color balancing was attempted since this alters color and textural signatures in the original imagery and interferes with the photointerpreter's ability to delineate habitats. As a result mosaics have visible seams between adjacent photos. This provides the photointerpreter with "true color" imagery for maximum ability to identify and delineate benthic features.
Conceptual Consistency
Once all of the photographs were orthorectified, the best segments of each photograph were selected for creation of the final mosaic. Segments of each photograph were selected to minimize sun glint, cloud interference, and turbidity in the final mosaic. Where possible, parts of images obscured by sunglint or clouds were replaced with cloud/glint free parts of overlapping images. As a result, most mosaics have few or no clouds or sun glint obscuring bottom features.
Aerial photographs were acquired for Puerto Rico and the U.S. Virgin Islands Benthic Mapping Project in 1999 by NOAA Aircraft Operation Centers aircraft and National Geodetic Survey cameras and personnel. Approximately 600, color, 9 by 9 inch photos were taken of the coastal waters of Puerto Rico and the U.S. Virgin Islands at 1:48000 scale. Specific sun angle and maximum percent cloud cover restrictions were adhered to when possible during the photography mission to ensure collection of high quality imagery for the purpose of benthic mapping. Print and diapositives were created from the original negatives. Diapositives were then scanned at a resolution of 500 dots per inch(DPI) using a metric scanner, yielding 2.4 by 2.4 meter pixels for the 1:48000 scale photography. All scans were saved in TIFF format for the purposes of orthorectification and photointerpretation. Georeferencing/mosaicing of the TIFF's was performed using Socet Set Version 4.2.1. Lens correction parameters were applied to each frame to eliminate image distortion. Airborne kinematic GPS was then used when available to provide a first order geolocation. When this information was not available, measurements were made between lightline strips for input into Socet Set to provide preliminary co-registration. Image to image tie-points were then used to further co-register the imagery, especially for photos taken over open water where ground control points were not available. Fixed ground features visible in the scanned photos were selected for ground control points (GCP's)which were then used to georeference the imagery. GCP's were measured using real-time DGPS (differential Global Positioning System). Points were obtained with a wide distribution throughout the imagery, especially on peninsulas and outer islands whenever possible since this results in the most accurate registration throughout each image. Only ground control points for terrestrial features were collected due to difficulty of obtaining precise positions for submerged features. A custom digital terrain model (DTM) was then created using the Socet Set software to correct for feature displacement due to terrain effects. To accomplish this, water features and the shoreline were set to an elevation of zero. Preliminary experimentation revealed that the effects of refraction on the position of submerged features in the imagery were not significant enough to make a correction for underwater displacement according to Snell's law. Selected land elevation points were then inserted from USGS 1:24000 Digital Elevation Models or other elevation data sets where clouds or other sources of interference prevented the Socet Set software from automatically making an accurate DTM. Once the terrain models were complete and a draft orthorectified mosaic was produced, a set of independent ground control points was used to measure the quality of each mosaic's rectification and ensure that it met acceptable limits of horizontal spatial accuracy. If spatial accuracy was not acceptable based on this comparison, additional modifications were made, until a satisfactory mosaic was created for each island. In general, mosaics were georeferenced such that pixels are positioned within one pixel width of their correct location.
2000-01-01T00:00:00
Source Contribution: NOS aerial photos were used to create orthophotomosaics | Source Geospatial Form: raster digital data | Type of Source Media: aerial photography and scanned photos
48000
National Geodetic Survey Aerial Photography of Puerto Rico and the U.S. Virgin Islands, 1999
1999-01-01
publication
National Oceanic and Atmospheric Administration (NOAA),National Ocean Service (NOS), National Geodetic Survey (NGS)
http://www8.nos.noaa.gov/biogeo_public/aerial/search.aspx
WWW:LINK-1.0-http--link
Source Citation URL
Source Citation URL
information
1999