2016. Collins Bartholomew Ltd. Representation of the area covered by GSM (2G) mobile communications around the world as of December 2016.
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2017. Collins Bartholomew Ltd. Representation of the area covered by GSM (2G) mobile communications around the world as of December 2017.
2018. Collins Bartholomew Ltd. Representation of the area covered by GSM (2G) mobile communications around the world as of December 2018.
2013. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2013.
2014. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2014.
2015. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2015.
2016. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2016.
2017. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2017.
2018. Collins Bartholomew Ltd. Points representing GSM (2G) mobile network operators within particular countries as of December 2018.
2016. Geological Survey (U.S.). This shapefile layer serves as an index map for individual sheets in the Global 30 Arc-Second Elevation map series. These maps are comprise a digit... East View Cartographic, Inc.