This means that the compass needle direction north is the same as true north on the map.
(This; means; that the compass needle direction north is the same as true north on the map) Context(This means,List([0, 10))):(the compass needle direction north; is; the same as true north on the map)
This means,List([0, 10))
This the compass needle direction north
means is
that the compass needle direction north is the same as true north on the map
the same as true north on the map