This function creates a duckdb connection to the number of trips data stored in a folder of CSV.gz files.
spod_duckdb_number_of_trips(
con = DBI::dbConnect(duckdb::duckdb(), dbdir = ":memory:", read_only = FALSE),
zones = c("districts", "dist", "distr", "distritos", "municipalities", "muni",
"municip", "municipios", "lua", "large_urban_areas", "gau", "grandes_areas_urbanas"),
ver = NULL,
data_dir = spod_get_data_dir()
)A duckdb connection object with 2 views:
od_csv_raw - a raw table view of all cached CSV files with the origin-destination data that has been previously cached in $SPANISH_OD_DATA_DIR
od_csv_clean - a cleaned-up table view of od_csv_raw with column names and values translated and mapped to English. This still includes all cached data.
A duckdb connection object. If not specified, a new in-memory connection will be created.
The zones for which to download the data. Can be "districts" (or "dist", "distr", or the original Spanish "distritos") or "municipalities" (or "muni", "municip", or the original Spanish "municipios") for both data versions. Additionaly, these can be "large_urban_areas" (or "lua", or the original Spanish "grandes_areas_urbanas", or "gau") for v2 data (2022 onwards).
Integer. Can be 1 or 2. The version of the data to use. v1 spans 2020-2021, v2 covers 2022 and onwards. See more details in codebooks with spod_codebook().
The directory where the data is stored. Defaults to the value returned by spod_get_data_dir().