pullTrees: Get Individual Tree Records From A Reference FIA datafile

In ecology-rocks/MakeMyForests: SORTIE-ND Preparation From Forest Inventory Data

Description

This function helps you pick which species you want to focus on for your state. TREE.CSV files for each state are large and by nature, contain a large amount of extraneous information. You may want to only look at softwoods or hardwoods or Maples. This function lets you put a vector of SPCD numbers and the full state tree file in, and receive a trimmed file with only your species of interest.

Usage

pullTrees(sppcodes, treedb, select = c("PLT_CN", "TREE", "SPCD", "DIA", "HT",
  "CR", "CDENCD", "TRANSCD", "BHAGE", "TOTAGE", "CLIGHTCD"))

Arguments

sppcodes	A vector of the species spcd numbers. These are found in the FIA's REF_SPECIES.csv file for your state, or can be imported using the pullSpeciesCodes function.
treedb	A dataframe containing the columns specified in select, along with an SPCD column.
select	The columns that you want to keep from the larger treedb. The default select values are "PLT_CN", "TREE", "SPCD", "DIA", "HT", "CR", "CDENCD", "TRANSCD", "BHAGE", "TOTAGE", and "CLIGHTCD."

Value

Returns a subsetted version of treedb with just the species you requested.

Note

This function assumes that the HT and DIA columns, standard to the FIA datasets, are in feet and inches. It will automatically convert these to meters and centimeters, respectively.

Examples

sampleSppCodes <- c(15, 20, 81)
## FullTreesCA is the CA_TREE.csv datafile from FIA
## see ?FullTreesCA for details
trees <- pullTrees(sampleSppCodes, FullTreesCA)

ecology-rocks/MakeMyForests documentation built on May 15, 2019, 7:57 p.m.