Am Fr., 8. Mai 2020 um 14:35 Uhr schrieb Colin Smale <colin.sm...@xs4all.nl >:
> As I mentioned before, the national datums of the Netherlands and Belgium > differ by over 2m, which for everything connected to water is very > significant. Waterways often form the border, with bridges that cross the > border. You cannot use a map/chart (at last for tidal waters) if you don't > know what datum it uses. > it seems Belgium is an "outlier" because they use the low water level as reference. Cheers Martin
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