This map 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 system was originally designed to view clouds by moonlight and to map 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. To access the source imagery used to publish this map service, you can use the Earth at Night Layer Package that is published by Esri.
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