Get hydrological data

This function takes information of where and when a set of environmental samples were collected and retrieves a suite of topographical and hydrological variables for each unique location. The variables include: elevation, slope, aspect, Topographical Wetness Index (TWI), flow accumulation, total flow accumulation within 500m, and distance to the nearest stream. If a DEM is not provided, then a DEM is acquired via elevatr::get_elev_raster and the suite of variables are calculated using functions from the 'WhiteboxTools' R frontend.

get_hydro_data(lon, lat, path_dem_raster = NULL, path_output)

Arguments

lon

A numeric vector giving the longitude of the sampling sites in Decimal Degrees.

lat

A numeric vector giving the latitude of the sampling sites in Decimal Degrees.

path_dem_raster

The file path to a Digital Elevation Model (DEM) raster. See download_elevation_data for methods to download DEM raster data. If NULL, a DEM is downloaded automatically using this function.

path_output

The file path of an output directory where spatial data will be saved.

Value

data.frame

Examples

if (FALSE) {

dir.create(file.path(getwd(), 'tmp'))

get_hydro_data(lon = template_es_data$lon,
               lat = template_es_data$lat,
               path_dem_raster = file.path(getwd(), 'tmp/dem.tif'),
               path_output = file.path(getwd(), 'tmp'))

}