Extracts a basin or subbasin
ExtractBasin.Rdthis function takes a shape and extracts the network above that node Note that this function does not preserve information associated with the original shapefile Future versions should allow the user to specify information to preserve, and allow for
Usage
ExtractBasin(
shape,
root,
basins,
exclude,
extract.inner = F,
attach.data = T,
upper,
upper.crs,
root.tolerance = Inf
)Arguments
- shape
an sf object consisting of linestrings (not multilinestrings!)
- root
a sf point, or length 2 vector with xy coordinates
- basins
a vector of names or sf feature indicating the basin to be extracted
- exclude
vector indexes to be dropped, will attempt to match a single name
- extract.inner
logical; should nodes that are in between the basins and the root be extracted
- attach.data
logical; should old data fields be obtained; time consuming
- upper
a point or points to stop the extraction
- upper.crs
a crs string for the upper point, if different from shape
- root.tolerance
a tolerance setting for the root. Low values will add the root to the network as a new node.