Any distinctions between "demarcate" and "delineate"?

Definitions:

1)demarcate;

1a) set the boundaries or limits of.

Example: "plots of land demarcated by barbed wire"

1b)separate or distinguish from; to separate clearly in other ways

Example: "art was being demarcated from the more objective science"

2)delineate:

2a) describe or portray (something) precisely:

Example: "the law should delineate and prohibit behavior that is socially abhorrent"

2b) indicate the exact position of (a border or boundary).

Example: The police delineated the crime scene with yellow tape.

A hedge delineates one plot of land from the other.