Reach Metric Map — map_reach

Produces a reach fluvial geomorphic metric thematic map displaying the metric values at each cross section.

map_reach_metric(
  metric,
  flowline_sf,
  xs_dimensions_sf,
  xs_label_freq = 2,
  background = "none",
  exaggeration = 20,
  extent_factor = 1.1
)

Arguments

metric: MetricThreshold object; the fluvial geomorphic metric to be mapped
flowline_sf: sf object; a flowline feature class.
xs_dimensions_sf: sf object; a cross section dimensions feature class.
xs_label_freq: numeric; An integer indicating the frequency of cross section labels.
background: character; The type of map background. One of "aerial", "elevation", or "none".
exaggeration: numeric; The degree of terrain exaggeration.
extent_factor: numeric; The amount the extent is expanded around the cross section feature class. Values greater than one zoom out, values less than one zoom in.

Value

a tmap object

# Define geomorphic metric wdr <- new(Class = "FluvialGeomorphicMetric", metric = "Width Depth Ratio", definition = "bankfull width / bankfull depth", variable = "xs_width_depth_ratio", threshold_breaks = c(0, 10, 20, Inf), threshold_labels = c("Incised", "Stable", "Overwidened"), source = "Dunn & Leopold, 1978")

# Create the reach metric map wdr_map <- map_reach_metric(wdr, fluvgeo::sin_flowline_sf, fluvgeo::sin_riffle_floodplain_dims_L3_sf) print(wdr_map)