Even better terrain mapping with natural=earth_bank

[brocke]

For an better representation of the terrain and the topographical features of an area, you could, in addition to the two already existing tags "natural=cliff" and "man_made=embankment", also render the tag "natural=earth_bank".

It may not be used that often yet, but there are many situations where it could be used or where it could replace other tags that are actually used incorrectly (such as natural =cliff). As for the style, I would use the same as for man_made=embankment.

Anyway — Thanks for all the work with opentopomap, you guys are great!