Read in gdp or population data for minor islands (not included in big inventories) from a custom made data set that gets data from a variety of sources (e.g. CIA World Factbook, Insee, BEA, PRISM, and Woldometers).
Value
The read-in data, usually a magpie object. If supplementary is TRUE a list including the data and metadata is returned instead. The temporal and data dimensionality should match the source data. The spatial dimension should either match the source data or, if the convert argument is set to TRUE, should be on ISO code country level.