Download nhdplusVAA data from HydroShare
downloads and caches nhdplusVAA data on your computer
download_vaa(path = get_vaa_path(), force = FALSE)
path |
character path where the file should be saved. Default is a persistent system cache as retrieved by user_cache_dir. Also see: get_vaa_path |
force |
logical. Force data re-download. Default = FALSE |
The VAA data is a aggregate table of information from the NHDPlusV2
elevslope.dbf(s), PlusFlowlineVAA.dbf(s); and NHDFlowlines. All data
originates from the EPA NHDPlus Homepage
here.
To see the location of cached data on your machine use
get_vaa_path.
To view aggregate data and documentation, see
here
path to cached data
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