> waterway=stream / river > railway=rail/narrow_gauge > highway=footway/pedestrian
These are narrow linear features. It’s unreasonable and less helpful to map these as polygons when a simple linear way will do, so it’s good to have a way to show the difference. And there is also a big functional difference between =footway and =pedestrian; the latter is wide enough for vehicles and usually allows deliveries at some hours. rail/narrow_gauge are not always functionally different, so that’s less useful, but I suppose rail fanatics like to know these things > shop=supermarket / convenience Supermarkets here in Papua are often the same size as a big convenience store in the USA. It’s the variety of products offered for sale that determines the difference. Though it’s probanly true that a supermarket and convenience store in the same town will always be different in size, relatively.
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