Maine Town and Townships Boundary Polygons Feature

METWP24P depicts political boundaries for all Organized Towns and Unorganized Territories in Maine at 1:24,000 scale. The layer also includes common town names and authoritative geocodes. The layer was created using the USGS 7.5-minute map series and the Maine GIS base layer COAST, which contains Maine's coastal Mean High Water (MHW) mark and Maine islands. To correct mapping errors and reflect changes to Minor Civil Division (MCD) boundaries, arcs and polygons were added or updated using the following data sources: photorevised USGS data; Maine GIS base layer coincident features; legal descriptions; GPS data; and Maine Department of Transportation (MEDOT) engineering plans. METWP24P also contains USGS 1:100,000-scale data and U.S. Department of Commerce Census Bureau TIGER Line Files from 1990 and 2000 where these provide a more correct or best available representation of a feature in question.METWP24P 数据集以1:24000比例尺展示了缅因州所有建制城镇（Organized Towns）与未建制领地（Unorganized Territories）的行政边界。该图层同时涵盖通用城镇名称与权威地理编码（geocodes）。本图层基于美国地质调查局（USGS）7.5分钟地形图系列以及缅因州地理信息系统（Geographic Information System, GIS）基础图层COAST构建，后者包含缅因州沿海平均高潮位（Mean High Water, MHW）标记与缅因州岛屿数据。为修正制图误差并反映民政小分区（Minor Civil Division, MCD）的边界变更，制作方通过以下数据源新增或更新了图层中的弧段与多边形：经影像修正的USGS数据、与缅因州GIS基础图层重合的地理要素、法律文书描述、GPS数据以及缅因州运输部（Maine Department of Transportation, MEDOT）工程规划方案。METWP24P 数据集还收录了USGS 1:100000比例尺数据，以及1990年与2000年的美国商务部人口普查局TIGER线文件（TIGER Line Files），当上述数据能够更准确或最优地呈现相关地理要素时，将被纳入本数据集。