downloads and caches NHDPlusVAA data on your computer
download_vaa(
path = get_vaa_path(updated_network),
force = FALSE,
updated_network = FALSE
)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
logical default FALSE. If TRUE, updated network attributes from E2NHD and National Water Model retrieved from doi:10.5066/P976XCVT .
character path to cached data
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