get_itrdb {FedData} | R Documentation |
Download the latest version of the ITRDB, and extract given parameters.
Description
get_itrdb
returns a named list of length 3:
'metadata': A data frame or
Simple Feature
(ifmakeSpatial==TRUE
) of the locations and names of extracted ITRDB chronologies,'widths': A matrix of tree-ring widths/densities given user selection, and
'depths': A matrix of tree-ring sample depths.
Usage
get_itrdb(
template = NULL,
label = NULL,
recon.years = NULL,
calib.years = NULL,
species = NULL,
measurement.type = NULL,
chronology.type = NULL,
raw.dir = paste0(tempdir(), "/FedData/raw/itrdb"),
extraction.dir = ifelse(!is.null(label), paste0(tempdir(),
"/FedData/extractions/itrdb/", label, "/"), paste0(tempdir(),
"/FedData/extractions/itrdb")),
force.redo = FALSE
)
Arguments
template |
An |
label |
A character string naming the study area. |
recon.years |
A numeric vector of years over which reconstructions are needed; if missing, the union of all years in the available chronologies are given. |
calib.years |
A numeric vector of all required years—chronologies without these years will be discarded; if missing, all available chronologies are given. |
species |
A character vector of 4-letter tree species identifiers; if missing, all available chronologies are given. |
measurement.type |
A character vector of measurement type identifiers. Options include:
if missing, all available chronologies are given. |
chronology.type |
A character vector of chronology type identifiers. Options include:
if missing, all available chronologies are given. |
raw.dir |
A character string indicating where raw downloaded files should be put. The directory will be created if missing. |
extraction.dir |
A character string indicating where the extracted and cropped ITRDB dataset should be put. The directory will be created if missing. |
force.redo |
If an extraction already exists, should a new one be created? Defaults to FALSE. |
Value
A named list containing the 'metadata', 'widths', and 'depths' data.
Examples
## Not run:
# Get the ITRDB records
ITRDB <- get_itrdb(template = FedData::meve, label = "meve", makeSpatial = T)
# Plot the VEP polygon
plot(meve$geometry)
# Map the locations of the tree ring chronologies
plot(ITRDB$metadata, pch = 1, add = T)
legend("bottomleft", pch = 1, legend = "ITRDB chronologies")
## End(Not run)