downloads and caches nhdplusVAA data on your computer
character path where the file should be saved. Default is a persistent system data as retrieved by nhdplusTools_data_dir. Also see: get_vaa_path
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
To see the location of cached data on your machine use
To view aggregate data and documentation, see
character path to cached data
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