Load a SpatialLinesDataFrame containing values for valley confinement, GIS slope and RUSLE. The SpatialDataFrame source data is the NHDv2Plus dataset which is segmented into 200-m stream intervals.

get_target_streamlines(region, extdir = NULL)

Arguments

region	defines the area of study and the files loaded
extdir	default to `NULL`, if not `NULL` this indicates a `file.path` or `character` pointing to a directory external to the package. This function expects to find shapefiles named `region_200m_VAA_LDD.shp` in `extdir`.

a SpatialLinesDataFrame