• Benthic Habitats of Puerto Rico and the U.S. Virgin Islands;Photomosaic of Puerto Rico (Luquillo), 1999

    Updated: Oct 01, 2013

    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.

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    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Metadata Date Sep 17, 2013
    Metadata Created Date Oct 01, 2013
    Metadata Updated Date Oct 01, 2013
    Reference Date(s) May 01, 2001 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NCDDC-NOS-NCCOS

    About this Dataset

    Resource Type Dataset
    Metadata Date Sep 17, 2013
    Metadata Created Date Oct 01, 2013
    Metadata Updated Date Oct 01, 2013
    Reference Date(s) May 01, 2001 (publication)
    Responsible Party National Oceanic and Atmospheric Administration(NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment(CCMA), Biogeography Branch (Point of Contact)
    Contact Email
    Access Constraints Use Constraints: none, Access Constraints: none
    Bbox East Long -65.55
    Bbox North Lat 18.55
    Bbox South Lat 18.32
    Bbox West Long -65.86
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 48cc0547-6262-494e-a0ad-a054f048f796
    Harvest Source Id e89e9c93-4500-401b-b5dc-ee86470fd269
    Harvest Source Title NCDDC-NOS-NCCOS
    Licence Data are not to be used for navigation.
    Metadata Language
    Metadata Type geospatial
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True

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