To maintain an up-to-date inventory of all open space in public or private ownership within the Village, including but not limited to natural landmarks, glacial and other geomorphic or physiographic features, streams and their floodplains, swamps, marshlands and other wetlands, unique biotic communities, scenic and other open areas of natural or ecological value, and of the ownership, present use and proposed use of open areas, so as to provide a base of information for recommendations by the CAB for their preservation and/or use.