Reviewed by GB/HB. Good to go.
Chatham Islands Imported: 5/5 Glen
LINZ defines this layer as <3m high, should we call it height=3m?
(3m scrub is a lot for a tramper to contemplate so maybe not)
how to make it more distinct from the mixed_scrub_poly layer which
is taller, and scat_scrub which is shorter?