Massachusetts Municipalities with Generalized Coast (polygons only) (Hosted Feature Layer)

This layer is the most accurate representation of Massachusetts' municipal (city and town) boundaries; this representation is based on the legislatively approved record of municipal boundaries. This hosted feature layer, with "Enable Sync" set, contains multi-part polygons only, representing inland and offshore areas, with one feature for each of the state's 351 municipalities. For a hosted feature layer with both polygon and line feature classes, see https://massgis.maps.arcgis.com/home/item.html?id=33061b8aef6848e1aeb9a4c059d62ed9. This political boundary datalayer has been created from latitude and longitude coordinates found in the 68-volume Harbor and Lands Commission Town Boundary Atlas. This Atlas series, and updates since it was published, describes the legal boundary for each of the 351 municipalities in Massachusetts. These coordinates were recorded from surveys of the location of each boundary marker around the periphery of each community. Each survey was tied into higher order monumented survey control points. The Atlases also include detailed descriptions of each community's boundary and location maps for each of the original boundary marker locations. The original surveys were conducted in the 1890s. The Atlas series was published in the early 1900s and has since been updated by the Survey Section of the Massachusetts Highway Department (now The Massachusetts Department of Transportation (MassDOT) - Highway Division) with changes as they are approved by the legislature. View full metadata本图层是马萨诸塞州市级（市与镇）行政边界的最精准可视化呈现，其绘制依据为经立法程序批准的官方边界档案。此配置了「启用同步（Enable Sync）」功能的托管要素图层（hosted feature layer）仅包含多部件面要素（multi-part polygons），涵盖内陆与近海区域，对应该州全部351个市级行政单元各一个要素。如需获取同时包含面要素与线要素类（feature classes）的托管要素图层，请访问：https://massgis.maps.arcgis.com/home/item.html?id=33061b8aef6848e1aeb9a4c059d62ed9。本政治边界数据图层源自《港口与土地委员会城镇边界图集》（全68卷）所载的经纬度坐标。该图集及后续更新内容，完整记载了马萨诸塞州351个市级行政单元的法定边界。这些坐标来自对各社区周边所有边界标志物位置的实地测量，每一次测量均依托高阶标定测量控制点完成。该图集还包含各社区边界的详细说明，以及所有原始边界标志物位置的定位地图。原始测量工作开展于19世纪90年代，该图集系列于20世纪初正式出版。此后，马萨诸塞州公路局测量科（现更名为马萨诸塞州交通部（MassDOT）公路处）会根据立法机构批准的边界变更，对图集进行更新。查看完整元数据（metadata）