long ago cartographers worked with pen and ink carefully handcrafting map based on explorers observation and diaries Today mapmaking is a high tech business cartographers use earth data stored in layers in geographic information system (gis) and special computer programs to create maps that can be easily updated as new information becomes available The national geographic staff cartographers mike money and Lauren thorny at right are reviewing a map of Alaska for the national geographic kids united states atlas. satellites in orbit around earth act as eyes in the sky recording ate about the planet land and ocean areas The data is converted to numbers that are transmitted back to computers that are specially programmed to interpret the data they record it in a form that cartographers can create maps. from called book national geographic kids
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