example_data: Example Stands

Description

ForestelementsR comes with five example stands that exist each in a 'raw' format that could have been taken from a user data base, and one of the package's specific stand object classes (fe_stand, fe_stand_spatial, ,fe_ccircle_spatial). Four of the example stands correspond to the fe_stand class, one to the fe_stand_spatial and one to fe_ccircle_spatialclass. The fe_stand, fe_stand_spatial and fe_ccircle_spatial objects have been constructed from the raw data using the functions fe_stand, fe_stand_spatial and fe_ccircle_spatial (see the examples section of the functions' documentation).

fe_stand compatible examples:

The first stand is a 53 years-old Norway spruce stand, the second one a 79 year old European beech stand, the third an even-aged mixed stand of Norway spruce and European beech (75 and 88 years, respectively). The fourth stand is a selection forest comprising the species Norway spruce, silver fir, European beech, and sycamore. All these stands have an area of 0.49 ha. The raw data (see name suffix) are data.frames (tibbles) comprising the following columns

stand: Name of the stand
species: Integer numbers following the TUM_WWK_short convention
no: Tree id
age: Tree age (i.e. stand age, in these examples) in years; note that the selection forest data do not provide age information, as this is usually not available in practice and mostly not meaningful for this forest type
d: Breast height (1.3 m) stem diameter in cm
h: Tree height in m
hcb: Crown base height in m
crad: Crown radius in m

The fe_stand objects (see name suffix) resulted from converting the raw data with fe_stand

fe_stand_spatial compatible example:

mm_forest_1_raw represents raw data from a research plot in a mixed mountain forest that has been surveyed several times. mm_forest_1_fe_stand_spatial is the representation of this plot as an object of class fe_stand_spatial

fe_ccircle_spatial compatible examples

spruce_pine_ccircle_raw represents raw data that could come from a typical inventory plot of the Bavarian State Forest, while spruce_pine_ccircle_spatial is an object of class fe_ccircle_spatial.

Usage

norway_spruce_1_raw
norway_spruce_1_fe_stand
european_beech_1_raw
european_beech_1_fe_stand
spruce_beech_1_raw
spruce_beech_1_fe_stand
selection_forest_1_raw
selection_forest_1_fe_stand
mm_forest_1_raw
mm_forest_1_fe_stand_spatial
spruce_pine_ccircle_raw
spruce_pine_ccircle_spatial
spruce_pine_ccircle_spatial_notrees

Arguments

Format

An object of class tbl_df (inherits from tbl, data.frame) with 498 rows and 8 columns.

An object of class fe_stand of length 4.

An object of class tbl_df (inherits from tbl, data.frame) with 268 rows and 8 columns.

An object of class fe_stand of length 4.

An object of class tbl_df (inherits from tbl, data.frame) with 225 rows and 8 columns.

An object of class fe_stand of length 4.

An object of class tbl_df (inherits from tbl, data.frame) with 283 rows and 7 columns.

An object of class fe_stand of length 4.

An object of class list of length 5.

An object of class fe_stand_spatial (inherits from fe_stand) of length 6.

An object of class list of length 8.

An object of class fe_ccircle_spatial (inherits from fe_stand_spatial, fe_stand) of length 6.

An object of class fe_ccircle_spatial_notrees (inherits from fe_ccircle_spatial, fe_stand_spatial, fe_stand) of length 6.