download_vaa: Download NHDPlusVAA data from HydroShare

In nhdplusTools: NHDPlus Tools

Download NHDPlusVAA data from HydroShare

Description

downloads and caches NHDPlusVAA data on your computer

Usage

download_vaa(
  path = get_vaa_path(updated_network),
  force = FALSE,
  updated_network = FALSE
)

Arguments

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 \Sexpr[results=rd]{tools:::Rd_expr_doi("10.5066/P976XCVT")}.

Details

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

Value

character path to cached data

nhdplusTools documentation built on June 10, 2025, 5:11 p.m.