findWaterbodies: Find National Hydrography Dataset Waterbodies

In mikejohnson51/HydroData: HydroData

Description

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

Usage

findWaterbodies(AOI = NULL, area = NULL)

Arguments

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 = FALSE)

Value

a list() of minimum length 2: AOI and waterboies

Author(s)

Mike Johnson

Examples

## Not run: 
getAOI(clip = "Tuscaloosa") %>% findWaterbodies()

## End(Not run)

mikejohnson51/HydroData documentation built on May 29, 2019, 2:34 p.m.