Download Vessel Monitoring System, VMS, raw data

This functions download data form the Datos Abiertos initiative

Usage

vms_download(
  year = lubridate::year((Sys.time())) - 1,
  destination.folder,
  check.url.certificate = TRUE
)

Arguments

year: year of data that user wants to download are selected default to the last year. A vector of years can also be used.
destination.folder: can be set to a folder where user want the data to be downloaded into. Defaults to working directory.
check.url.certificate: logical. Under Ubuntu systems the function might draw a certificate error, you can deactivate the certificate check by setting this to FALSE and should work.

Value

saves downloaded data into a folder called VMS-data within the directory specified

Details

Data are downloaded from this link: https://www.datos.gob.mx/busca/dataset/localizacion-y-monitoreo-satelital-de-embarcaciones-pesqueras/ Downloaded data will be downloaded and decompressed in a VMS-data folder in a location chosen by the user by specifying a path in destination.folder. If a location is not specified it downloads data by default to the current working directory. Within the main folder, data is organized in different folders by months (in Spanish names) and within each there are multiple .csv files each containing two weeks of data points.

Examples


# Download single year
# in Ubuntu it draws a certificate error when downloading, testing in windows and MacOS
# does not draw that error and you can use default certificate checking.
# \donttest{
vms_download(2019, destination.folder = tempdir(), check.url.certificate = FALSE)
# }