Calculate additive function values for sites in a LSN
afv_sites(
sites,
edges,
afv_col,
save_local = TRUE,
lsn_path = NULL,
overwrite = TRUE
)
A named list of one or more sf
objects with
POINT geometry that have been snapped to the LSN using
sites_to_lsn
.
An sf
object with LINESTING geometry created
using lines_to_lsn
.
Name of the column in edges
containing
the additive function value for each feature, in character
format. Created using afv_edges
.
Logical indicating whether the updated
sites
should be saved to lsn_path
in geopackage
format. File basenames are taken from the names assigned to the
sites
list. Default is TRUE
.
Optional. Local pathname to a directory in
character format specifying where the LSN resides, which is
created using link[SSNbler]{lines_to_lsn}
. Must be
specified if save_local = TRUE
.
A logical indicating whether results should be
overwritten if afv_col
already exists in sites
or sites.gpkg already exists in lsn_path
and
save_local = TRUE
. Default = TRUE.
One or more sf
object(s) with all the original data
from sites
, along with a new afv_col
column in each
sites sf
object. A named list is returned. If
save_local = TRUE
, a geopackage for each sf
object
is saved in lsn_path
. Output file names are assigned based
on the input sites
attribute names
.