Land Use, 21 Categories - Ipswich and Parker River Watersheds - 1971 - Idrisi Raster File.

This datalayer is part of a group of layers used for research in the Ipswich River Watershed. This layer was created in July 2006 for Marine Biological Laboratory (MBL) in Woods Hole, MA. This layer shows the land use, 21 categories, for the towns in the Ipswich River Watershed and the Parker River Watershed for 1971. This datalayer has complete information.本数据图层为伊普斯维奇河流域（Ipswich River Watershed）相关研究所用的一组数据图层之一。该图层于2006年7月由位于马萨诸塞州伍兹霍尔的海洋生物实验室（Marine Biological Laboratory, MBL）制作完成，展示了1971年伊普斯维奇河流域与帕克河流域（Parker River Watershed）内各城镇的土地利用状况，共涵盖21个分类类别。本数据图层信息完整。