This point layer represents canoe access and portage sites in the Merrimack River Basin System (Megabasin).. It was created using the Appalachian Mountain Club's River Guide and Nashua River Watershed Assoc. and Merrimack River Watershed Council guides. Access points were located by relating descriptions in the river guides to MassGIS road and river datalayers. In some cases, the organizations were called for clarification. The layer uses look-up tables for storing its portage-related information.
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