MAPS IN THE NEWS:
The U.S. is updating the way elevation is measured -- old techniques date back to before GPS, supercomputers, and sophisticated gravity measurements -- and the impact will be changes, mostly decreases, in stated elevations across the U.S. Because inaccuracies in the current measurement system accumulate as one moves diagonally from Florida to Alaska, south Florida may actually gain in stated elevation whereas parts of Alaska and the Pacific Northwest are likely to lose five or six (or more) feet. The country's tallest mountains will be shorter, and some neighborhoods will almost certainly be designated to lie in floodplains, requiring special insurance. This map from The New York Times shows anticipated impacts of the new geodetic system to be rolled out in 2022 or 2023. (from www.nytimes.com/2020/05/22/science/maps-elevation-geodetic-survey.html)
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