Package index

Delineate

Map the floodplain from an elevation model and a stream network.

fl_valley_confine()

Delineate unconfined valleys using the Valley Confinement Algorithm

fl_valley_poly()

Convert a binary valley raster to polygons

fl_stream_rasterize()

Rasterize a stream network onto a DEM grid

Get an elevation model

fl_dem_aoi()

Fetch a DEM cropped to an AOI

Per watercourse

Attribute one floodplain to each watercourse, and join per-reach flags to it.

fl_valley_attribute()

Attribute valley cells to the stream groups that produced them

fl_valley_join()

Join per-segment attributes to valley cells by position

Flood levels and parameters

fl_scenarios()

Load flood factor scenarios

fl_params()

Load VCA parameter legend

Pipeline steps

The steps fl_valley_confine() runs, for running or inspecting one on its own.

fl_mask()

Create a binary mask from a raster by thresholding

fl_mask_distance()

Binary mask by Euclidean distance from features

fl_cost_distance()

Accumulated cost distance from stream cells

fl_flood_model()

Run the full flood model

fl_flood_surface()

Compute flood surface elevation at stream cells

fl_flood_depth()

Interpolate flood surface and compute depth above terrain

fl_patch_rm()

Remove small patches from a binary raster

Raster helpers

Combine, subtract or filter binary rasters outside fl_valley_confine().

fl_flood_assemble()

Union multiple binary rasters

fl_flood_trim()

Subtract mask layers from a binary raster

fl_patch_conn()

Keep only patches connected to anchor features