The adoption of any street, street lines or other public lands pursuant to this article as part of the official map shall not, in and of itself, constitute or be deemed to constitute the opening or establishment of any street nor the taking or acceptance of any land, nor shall it obligate the municipality to improve or maintain any such street or land. The adoption of proposed watercourses or public grounds as part of the official map shall not, in and of itself, constitute or be deemed to constitute a taking or acceptance of any land by the municipality.
53 P.S. § 10404