Extend transects for any transects with invalid cross section attributes

Usage

extend_transects_by_cs_attributes(
  transects = NULL,
  flowlines = NULL,
  crosswalk_id = NULL,
  scale = 0.5,
  keep_lengths = FALSE,
  reindex_cs_ids = FALSE,
  verbose = TRUE
)

Arguments

transects: sf dataframe of transect LINESTRING geometries
flowlines: sf dataframe of flowline LINESTRING geometries
crosswalk_id: character
scale: numeric percent of original transect length to extend (in both directions). Default is 0.5 or 50% of transects length (i.e. 25% increase in length in both directions).
keep_lengths: logical whether to keep a record of the original transect lengths or not, default is FALSE, original lengths are not kept
reindex_cs_ids: logical, whether to reindex the cs_ids to ensure each crosswalk_id has cs_ids of 1-number of transects. Default is FALSE, which guarantees crosswalk_id/cs_ids remain untouched as they were given in the input data. Setting this to TRUE will make sure if any cross sections were removed from a crosswalk_id, then the cs_ids are renumbered so there are no gaps between cs_ids within a crosswalk_id
verbose: logical

Value

dataframe or sf dataframe of extended transects