Buck Island National Monument Accuracy Assessment Point Data for Benthic Habitats of Puerto Rico and the U.S. Virgin Islands

Metadata Updated: October 12, 2020

This project is a cooperative effort among the National Ocean Service, National Centers for Coastal Ocean Science, Center for Coastal Monitoring and Assessment; the United States Geological Survey; the National Park Service; and the National Geophysical Data Center. The goal of this work was to develop coral reef mapping methods and compare the accuracy of benthic habitat maps generated from on-screen digitizing off of georeferenced color aerial photography, with maps digitized directly from hard copy photographs using a stereoplotter. Thematic accuracy of the Puerto Rico and U.S. Virgin Islands habitat maps was evaluated for the three most general habitat categories: unconsolidated sediment, submerged vegetation, and coral reef/hard bottom. Accuracy was estimated at two locations within the project area that included the full complement of habitat types, depth ranges, and water conditions representative of Puerto Rico and the U.S. Virgin Islands. For this reason, the accuracy of maps measured at these two locations is assumed to be representative of map accuracy elsewhere in the project area. This approach, which focused in two small areas, enabled a statistically robust evaluation of thematic accuracy to be conducted without the logistic difficulty of collecting data for accuracy assessment over the entire project area.Comparison with the accuracy assessment data revealed very similar levels of thematic accuracy between the two maps. Overall accuracy was 93.6 percent (Kappa 0.90) for on-screen digitizing and 87.8 percent (Kappa 0.82) for maps digitized directly from stereo pairs. Maps produced from on-screen digitizing were almost 100 percent accurate for the submerged vegetation and unconsolidated sediment categories but misclassified a small percentage of hardbottom sites as unconsolidated sediment. Similarly, the maps produced using the stereoplotter were 100 percent accurate at classifying submerged vegetation but misclassified a small percentage of hardbottom and unconsolidated sediment sites. These findings suggest that both of these mapping techniques result in acceptable levels of thematic accuracy for maps produced at this scale with this type of classification scheme.

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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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Dates

Metadata Date March 29, 2020
Metadata Created Date October 12, 2020
Metadata Updated Date October 12, 2020
Reference Date(s) December 1, 2001 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from CoRIS FGDC Metadata

Additional Metadata

Resource Type Dataset
Metadata Date March 29, 2020
Metadata Created Date October 12, 2020
Metadata Updated Date October 12, 2020
Reference Date(s) December 1, 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 -64.42
Bbox North Lat 18.42
Bbox South Lat 17.62
Bbox West Long -65.09
Coupled Resource
Frequency Of Update notPlanned
Guid buck_island_ac_assess
Harvest Object Id 2b856575-adca-4600-b511-bee5f504a2d0
Harvest Source Id ec0e8c99-38eb-4e41-b284-91845bc95589
Harvest Source Title CoRIS FGDC Metadata
Licence Data are not to be used for navigation.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System urn:ogc:def:crs:EPSG::4269
Spatial Harvester True

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