findWaterbodies returns a SpatialPolgonsDataframe of all NHDwaterbodies within an AOI.
Data comes from the USGS CIDA server and contain 23 attributes, perhaps most notably:
'objectid' : integer Integer value that uniquely identifies the waterbody of each feature in the NHD
'comid' : character The COMID draining into the feature
'fdate': POSITct Date of last feature modification
'gnis_id' : character Unique identifier assigned by GNIS
'gnis_name' : character Proper name, term, or expression by which a particular geographic entity is known
'meandepth' : numeric Mean depth of the waterbody
'lakevolume' : numeric Total waterbody volume
'maxdepth' : character Maximum depth of waterbody
'meanused' : integer The average amount of water used
findWaterbodies(AOI = NULL, ids = FALSE)
| AOI | A Spatial* or simple features geometry, can be piped from getAOI |
|---|---|
| ids | If TRUE, a vector of waterbody IDs is added to retuned list (default = |
a list() of minimum length 2: AOI and waterboies
# NOT RUN { getAOI(clip = "Tuscaloosa") %>% findWaterbodies() # }