In MalditoBarbudo/lfcdata: Access to the LFC Databases

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)

library(lfcdata)

Spanish National Forest Inventory for Catalonia database

Spanish National Forest Inventory data, localised at Catalonia is provided in this database. Data is presented at plot level (no individual trees data is available at this moment) for all the NFI versions available:

• NFI2: Samipling done between 1990-1991.
• NFI3: Samipling done between 2000-2001.
• NFI4: Samipling done between 2013-2016.

To access the data use the nfi() function:

nfidb <- nfi()
nfidb

Available tables and variables info

Available tables in the NFI database can be consulted with nfi_avail_tables,

# limited to the first
nfi_avail_tables(nfidb)[1:5]

and a description for the tables with the nfi_describe_table function:

tables_available <- nfi_avail_tables(nfidb)
nfi_describe_table(nfidb, tables_available[1])

Information about the variables can also be consulted with nfi_describe_var:

nfi_describe_var(nfidb, 'basal_area_balance')

See vignette('tables_and_variables', package = 'lfcdata') for more detailed information.

Access the data

Select the table to access and use the nfi_get_data function. Tables can be related by plot_id variable:

library(dplyr)

all_info_nfi4 <- nfi_get_data(nfidb, 'plots') |>
  right_join(nfi_get_data(nfidb, 'plot_nfi_4_results')) |>
  left_join(nfi_get_data(nfidb, 'plots_nfi_4_dynamic_info'))

all_info_nfi4

Data can be retrieved in a spatial object (with plot coordinates as POINT), using the sf package (http://r-spatial.github.io/sf/):

library(sf)

nfi_get_data(nfidb, 'plot_nfi_4_results', spatial = TRUE)
nfi_get_data(nfidb, 'plot_nfi_4_results', spatial = TRUE) |>
  plot()

MalditoBarbudo/lfcdata documentation built on May 2, 2023, 10:30 p.m.