Boundary, Ipswich Watershed, Peabody, Massachusetts - vector

The political boundary datalayer is a polygon representation of town boundaries created from arcs developed from survey coordinates extracted from the 68-volume Harbor and Lands Commission Town Boundary Atlas for the 351 communities (cities and towns) in Massachusetts. The Atlas was published in the early 1900's and is maintained by the Survey Section of Massachusetts Highway Department. For communities with a coastal boundary, MassGIS has collaborated with Massachusetts Water Resources Authority and the Department of Environmental Protection to complete a 1:12000 scale coastline. The boundary for the coastline was defined as being the upland side of tidal flats and rocky inter-tidal zones. Note that the 351 communities are the official municipal names, not including "villages" or other sections of towns. Note: Complete metadata is available within the downloaded zip file. This metadata can be viewed with ESRI ArcGIS software, and can be exported to FGDC and ISO metadata formats.

本政治边界数据图层为马萨诸塞州351个社区（各市镇）的城镇边界多边形表达成果，其数据源自从68卷《港口与土地委员会城镇边界图集 (Harbor and Lands Commission Town Boundary Atlas)》中提取的测量坐标生成的弧段。该图集于20世纪初出版，由马萨诸塞州公路局 (Massachusetts Highway Department) 测量科维护。对于拥有海岸边界的社区，马萨诸塞州地理信息系统 (MassGIS) 联合马萨诸塞州水资源管理局 (Massachusetts Water Resources Authority) 与环境保护署 (Department of Environmental Protection) 完成了1:12000比例尺的海岸线数据制作，该海岸线的边界被划定为潮滩与岩质潮间带的陆侧区域。需注意，此处的351个社区均为官方市政名称，不包含"村庄"或城镇的其他分区。注：完整元数据 (metadata) 可在下载的压缩包中获取，可通过ESRI ArcGIS软件查看，并可导出为联邦地理数据委员会 (Federal Geographic Data Committee, FGDC) 与国际标准化组织 (International Organization for Standardization, ISO) 元数据格式。