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"Year 2013 nighttime lights brightness values at station location (original 1 km horizontal resolution). Reference: NOAA DMSP stable nighttime lights: a 0.925 km resolution dataset of non-ephemeral visible light intensity at night (Dataset: http://ngdc.noaa.gov/eog/dmsp/downloadV4composites.html)
mean value within a radius of 1 km around station location of the year 2013"(xsd:string)