NHDPlusV2 Attribute Subset
Return requested NHDPlusv2 Attributes
get_vaa(atts = NULL, path = get_vaa_path(), download = TRUE)
atts |
character The variable names you would like, always includes comid |
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 |
download |
logical if TRUE, the default, will download VAA table if not found at path. |
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
data.frame
## Not run:
# NOTE: path = tempfile() for demo only.
temp <- tempfile()
get_vaa("slope", path = temp)
get_vaa(c("slope", "lengthkm"), path = temp)
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.