extract_variables {medfateland} | R Documentation |
Landscape variables
Description
Extract or estimate variables from landscape objects (class 'sf').
Usage
extract_variables(x, vars = "land_cover_type", SpParams = NULL, ...)
plot_variable(x, variable = "land_cover_type", SpParams = NULL, r = NULL, ...)
Arguments
x |
An object of class |
vars |
A string vector with the name of the variables to extract (see details). |
SpParams |
A data frame with species parameters (see |
... |
Additional arguments (not used). |
variable |
A string with the name of the variables to draw (see details). |
r |
An object of class |
Details
The following string values are available for vars
.
Topography:
"elevation"
: Elevation in m."slope"
: Slope in degrees."aspect"
: Slope in degrees."land_cover_type"
: Land cover type.
Soil:
"soil_vol_extract"
: Total water extractable volume (mm)."soil_vol_sat"
: Total water volume at saturation (mm)."soil_vol_fc"
: Total water volume at field capacity (mm)."soil_vol_wp"
: Total water volume at wilting point (mm)."soil_vol_curr"
: Current total water volume (mm)."soil_rwc_curr"
: Current soil relative water content (%)."soil_rew_curr"
: Current soil relative extractable water (%)."soil_theta_curr"
: Current soil moisture content (% vol.)"soil_psi_curr"
: Current soil water potential (MPa).
Watershed:
"depth_to_bedrock"
: Depth to bedrock (m)."bedrock_porosity"
: Bedrock porosity."bedrock_conductivity"
: Bedrock conductivity (m/day)."aquifer_elevation"
: Aquifer elevation over bedrock (m)."depth_to_aquifer"
: Depth to aquifer (m)."aquifer"
: Aquifer volume (mm)."snowpack"
: Snowpack water equivalent (mm).
Forest stand:
"basal_area"
: Basal area (m2/ha)."tree_density"
: Tree density (ind/ha)."mean_tree_height"
: Mean tree height (cm)."dominant_tree_height"
: Dominant tree height (cm)."dominant_tree_diameter"
: Dominant tree diameter (cm)."quadratic_mean_tree_diameter"
: Quadratic mean tree diameter (cm)."hart_becking_index"
: Hart-Becking index."leaf_area_index"
: Leaf area index (m2/m2)."foliar_biomass"
: Foliar biomass (kg/m2)."fuel_loading"
: Fine live fuel loading (kg/m2)."shrub_volume"
: Shrub volume (m3/m2).
Value
Function extract_variables()
returns an object of class sf
with the desired variables.
Function plot_variables()
returns a ggplot object.
Author(s)
Miquel De Cáceres Ainsa, CREAF.
See Also
forest
, soil
, summary.forest
, shinyplot_land
Examples
# Load data and species parameters from medfate
data(example_ifn)
data(SpParamsMED)
# Calculate basal area and leaf area index
# for all forest stands
extract_variables(example_ifn, vars = c("basal_area", "leaf_area_index"),
SpParams = SpParamsMED)