View source: R/ch_wbt_flow_accumulation.R
ch_wbt_flow_accumulation | R Documentation |
Creates flow accumulation grid file
ch_wbt_flow_accumulation(fn_dem_ns, fn_flowacc, return_raster = TRUE)
fn_dem_ns |
File name of dem with sinks removed. |
fn_flowacc |
File name for flow accumulation grid to be created. |
return_raster |
If |
If return_raster = TRUE
, the flow accumulation
grid will be returned as a raster object, otherwise NULL
is returned.
Dan Moore
# Not tested automatically as requires installation of Whitebox library(raster) test_raster <- ch_volcano_raster() dem_raster_file <- tempfile(fileext = c(".tif")) no_sink_raster_file <- tempfile("no_sinks", fileext = c(".tif")) # write test raster to file writeRaster(test_raster, dem_raster_file, format = "GTiff") # remove sinks removed_sinks <- ch_wbt_removesinks(dem_raster_file, no_sink_raster_file, method = "fill") # get flow accumulations flow_acc_file <- tempfile("flow_acc", fileext = c(".tif")) flow_acc <- ch_wbt_flow_accumulation(no_sink_raster_file, flow_acc_file) plot(flow_acc)
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