Generate depth points for interpolation

Usage

generate_depth_points(
  shoreline,
  islands = NULL,
  point_data = NULL,
  contours = NULL,
  res = 2,
  subsample = TRUE,
  crs = NULL
)

Arguments

shoreline: sf object of lake shoreline.
islands: sf object of lake islands if present.
point_data: sf object of depth points or a dataframe of points with columns 'lon' and 'lat'. Must contain a "depth" column. If NULL, then contours must be provided. If NULL, then contours must be provided.
contours: sf object of depth contours. If NULL, then points must be provided.
res: numeric resolution of output raster in metres.
subsample: logical subsample points to 10000 if TRUE. Default is TRUE.
crs: target coordinate reference system: object of class crs, or input string for st_crs

Value

sf object of depth points.

Examples

shoreline <- readRDS(system.file("extdata/rotoma_shoreline.rds",
package = "bathytools"))
point_data <- readRDS(system.file("extdata/depth_points.rds",
package = "bathytools"))

# Generate depth points with points ----
depth_points <- generate_depth_points(shoreline = shoreline,
point_data = point_data)
#> Generating depth points... [2024-11-13 23:08:38]
#> Finished! [2024-11-13 23:08:38]

# Generate depth points with contours ----
contours <- readRDS(system.file("extdata/depth_contours.rds",
package = "bathytools"))
depth_points <- generate_depth_points(shoreline = shoreline,
contours = contours)
#> Generating depth points... [2024-11-13 23:08:38]
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: repeating attributes for all sub-geometries for which they may not be constant
#> Warning: large number of points for interpolation (100695)
#> Finished! [2024-11-13 23:08:42]