rdfs:comment"The files are cloud-free composites made using all the available archived DMSP-OLS smooth resolution data for calendar years. In cases where two satellites were collecting data - two composites were produced. The products are 30 arc second grids, spanning -180 to 180 degrees longitude and -65 to 75 degrees latitude. For details, see https://ngdc.noaa.gov/eog/gcv4_readme.txt"
skos:definition"Nighttime lights brightness values for the year 2013 at 5 km resolution (original 1 km horizontal resolution). (Dataset: http://ngdc.noaa.gov/eog/dmsp/downloadV4composites.html)
mean value within a radius of 5 km around station location of the year 2013"(xsd:string)