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Attribution of fish sampling data to NHDPlus HR catchments within the Chesapeake Bay Watershed


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Boyle, L.J., Krause, K.P., Walker, R.H., Gressler, B.P., Young, J.A., and Maloney, K.O., 2024, Attribution of fish sampling data to NHDPlus HR catchments within the Chesapeake Bay Watershed: U.S. Geological Survey data release,


This data release links fish survey data from a suite of programs in the Chesapeake Bay watershed to the NHDPlus High Resolution Region 02 networks, hereafter referred to as NHDPlusHR. The data set contains site name, survey program, coordinates of sample, ancillary information such as sample date and site location information where available, and HR Permanent Identifier. It also includes a confidence classification category for each of NHD assignment based on a set of pre-determined rules. In total there were 15 confidence categories ranging from high confidence to low confidence. We caution the use of sampling points which were given anything other than "high" confidence in their assignment to a given NHD catchment/flowline to avoid [...]


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Fish_NHDlinks.csv 3.97 MB text/csv
Fish_NHDLinks_datadictionary.csv 4.01 KB text/csv
confidence_dictionary.csv 3.45 KB text/csv


Fish sampling data points were assigned to the NHDPlus High Resolution Region 02 (NHDPlusHR) catchments to enhance the spatial accuracy of various geospatial landscape data that would be summarized to NHD catchments and attributed to represent the local and upstream landscape influencing the sampling data. These data links are of better quality than a naive intersection of sampling points and NHD catchments via coordinates, since all points were visually checked for accuracy using topographic maps and data provider ancillary site information. This process limits linking errors, especially erroneous linking of points representing flowlines that are not present in the NHD network, or points with low resolution spatial data that can be corrected by consulting data provider notes. This vetted linking makes the data potentially useful for a variety of landscape ecology approaches utilizing the NHDPlusHR catchments and/or networks.

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DOI doi:10.5066/P9ZVO70A

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