usgs.gov Rank 4.5K. Estimated value 503,256$icgc.cat Rank 308.8K. Estimated value 7,032$meteorologiaenred.com Rank 303.8K. Estimated value 7,152$maptek.com Rank 1.6M. Estimated value 1,332$geospatialworld.net Rank 120.6K. Estimated value 18,144$nationalgeographic.org Rank 12.3K. Estimated value 181,452$geoexpro.com Rank 524.8K. Estimated value 4,116$digitalglobe.com Rank 245.1K. Estimated value 8,880$earthsci.org Rank 1.2M. Estimated value 1,824$egpet.net Rank 576.5K. Estimated value 3,744$