tests/testthat/test_hydroflatten_dem.R

In FluvialGeomorph/fluvgeo: A Package for Fluvial Geomorphic Analysis

test_that("hydroflatten channel", {
  fl_mapedit <- sf::st_read(system.file("extdata", "shiny", "fl_mapedit.shp",
                                        package = "fluvgeodata"), quiet = TRUE)
  fl_fix <- sf_fix_crs(fl_mapedit)
  fl_3857 <- sf::st_transform(fl_fix, crs = 3857) # Web Mercator
  reach_name <- "current stream"
  dem <- get_dem(fl_3857)
  flowline <- flowline(fl_3857, reach_name, dem)
  station_distance = 5
  flowline_points <- flowline_points(flowline, dem, station_distance)
  buffer_distance <- 300
  detrend <- detrend(dem, flowline, flowline_points, buffer_distance)
  rem <- detrend$rem
  trend <- detrend$trend
  relative_water_depth <- 3
  hf <- hydroflatten_dem(dem, trend, relative_water_depth)
  #plot(hf)
  expect_true("SpatRaster" %in% class(hf))
})

test_that("hydroflatten floodplain", {
  fl_mapedit <- sf::st_read(system.file("extdata", "shiny", "fl_mapedit.shp",
                                        package = "fluvgeodata"), quiet = TRUE)
  fl_fix <- sf_fix_crs(fl_mapedit)
  fl_3857 <- sf::st_transform(fl_fix, crs = 3857) # Web Mercator
  reach_name <- "current stream"
  dem <- get_dem(fl_3857)
  flowline <- flowline(fl_3857, reach_name, dem)
  station_distance = 5
  flowline_points <- flowline_points(flowline, dem, station_distance)
  buffer_distance <- 300
  detrend <- detrend(dem, flowline, flowline_points, buffer_distance)
  rem <- detrend$rem
  trend <- detrend$trend
  relative_water_depth <- 13
  hf <- hydroflatten_dem(dem, trend, relative_water_depth)
  #plot(hf)
  expect_true("SpatRaster" %in% class(hf))
})