Download and read data and metadata from repositories in the DataONE network.
The metajam package can be installed from GitHub using the devtools package:
devtools::install_github("nceas/metajam")
To download a data object, specify the data object URL and local download path in the download_d1_data function:
library(metajam)
download_d1_data("https://arcticdata.io/metacat/d1/mn/v2/object/urn%3Auuid%3Ac102bac4-a5ea-4699-bfec-8d4ba60948d8", path = ".")
The output is saved in a folder with the name {metadata_id}__{file_name}, which contains the data file and its associated metadata. The metadata follows these conventions:
{file_name}__summary_metadata.csv- summary metadata in a tabular format, which includes date downloaded, data file name, file/metadata URL's, etc.{file_name}__full_metadata.xml- metadata xml file, if it could be downloaded{file_name}__attribute_metadata.csv- attribute metadata in a tabular format, if included in the metadata xml{file_name}__attribute_factor_metadata.csv- attribute factor metadata in a tabular format, if included in the metadata xml
The read_d1_files function allows you to read the downloaded data and metadata directly into your R environment. Simply run the function with the folder path to the downloaded objects, and all data and metadata files will be returned as data frames stored in a list. Use {object_name}$data to access the data, and {object_name}${metadata_type}_metadata to access its associated metadata.
schools <- read_d1_files("./doi_10.18739_A2DP3X__Alaska_Schools_Rentention2009_15")
