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Coastwide Reference Monitoring System (CRMS) 2021 Site 0157 land-water classification data

Wetland restoration efforts conducted by the Coastal Wetlands Planning, Protection and Restoration Act (CWPPRA) in Louisiana rely on monitoring efforts to determine the efficacy of these efforts. The Coastwide Reference Monitoring System (CRMS) was developed to assist in a multiple-reference approach that uses aspects of hydrogeomorphic functional assessments and probabilistic sampling for monitoring. The CRMS program includes a suite of approximately 398 sites that encompass the range of hydrological and ecological conditions for each stratum. As part of CRMS, land and water classifications are created from Digital Orthophoto Quarter Quadrangles (DOQQs) approximately every three years at all CRMS sites. A DOQQ is a raster image in which displacement in the image caused by sensor orientation and terrain relief has been removed and combines the image characteristics of a photo with geometric qualities of a map. The DOQQs generated for this project consist of 2021 Color Infrared (CIR) Digital Imagery. These images were classified into land and water categories using a threshold of the near infrared (NIR) band, followed by supervised and unsupervised classification. Initial classification results are then reviewed by multiple image analysts to identify and manually recode errors. The final land-water classifications are intended to serve as both geographic and quantitative assessments of landscape composition on the date of acquisition. Five previous assessments have been conducted (2005, 2008, 2012, 2015/2016, and 2018). Once the program creates enough data points for statistical analyses, these data will be used for land area change rate calculation.

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Author(s) Holly J Beck orcid, Jason Dugas orcid, Adrienne Garber orcid, Brady Couvillion orcid, Michelle Fischer orcid
Publication Date 2023-08-28
Beginning Date of Data 2021-11-14
Ending Date of Data 2021-11-14
Data Contact
DOI https://doi.org/10.5066/P9109FW1
Citation Beck, H.J., Dugas, J., Garber, A., Couvillion, B., and Fischer, M., 2023, Coastwide Reference Monitoring System (CRMS) 2021 Site 0157 land-water classification data: U.S. Geological Survey data release, https://doi.org/10.5066/P9109FW1.
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Metadata Date 2023-08-28
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License http://www.usa.gov/publicdomain/label/1.0/
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Harvest Source: ScienceBase
Harvest Date: 2024-02-24T09:44:24.901Z