This layer presents a nighttime view of the Earth that provides an informational and educational view of our planet at night. The image was produced by mosaicking Defense Meteorlogical Satellite Program (DMSP) Operational Linescan System (OLS) satellite images. This map presents the locations of permanent lights on the Earth's surface. These data are derived from 9 months of observations superimposed on a darkened land surface. ESRI georeferenced these data to a real-world coordinate system. The layer is suitable for display to a largest scale of 1:18,500,000.
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