download_vaa | R Documentation |
downloads and caches nhdplusVAA data on your computer
download_vaa( path = get_vaa_path(updated_network), force = FALSE, updated_network = FALSE )
path |
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 |
force |
logical. Force data re-download. Default = FALSE |
updated_network |
logical default FALSE. If TRUE, updated network attributes from E2NHD and National Water Model retrieved from doi: 10.5066/P9W79I7Q. |
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
character path to cached data
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