VT Data - Town Boundaries

(Link to Metadata) The BNDHASH dataset depicts Vermont village, town, county, and Regional Planning Commission (RPC) boundaries. It is a composite of generally 'best available' boundaries from various data sources (refer to ARC_SRC and SRC_NOTES attributes). However, this dataset DOES NOT attempt to provide a legally definitive boundary. The layer was originally developed from TBHASH, which was the master VGIS town boundary layer prior to the development and release of BNDHASH. By integrating village, town, county, RPC, and state boundaries into a single layer, VCGI has assured vertical integration of these boundaries and simplified maintenance. BNDHASH also includes annotation text for town, county, and RPC names. BNDHASH includes the following feature classes: 1) BNDHASH_POLY_VILLAGES = Vermont villages 2) BNDHASH_POLY_TOWNS = Vermont towns 3) BNDHASH_POLY_COUNTIES = Vermont counties 4) BNDHASH_POLY_RPCS = Vermont's Regional Planning Commissions 5) BNDHASH_POLY_VTBND = Vermont's state boundary 6) BNDHASH_LINE = Lines on which all POLY feature classes are built The master BNDHASH data is managed as an ESRI geodatabase feature dataset by VCGI. The dataset stores village, town, county, RPC, and state boundaries as seperate feature classes with a set of topology rules which binds the features. This arrangement assures vertical integration of the various boundaries. VCGI will update this layer on an annual basis by reviewing records housed in the VT State Archives - Secretary of State's Office. VCGI also welcomes documented information from VGIS users which identify boundary errors. NOTE - VCGI has NOT attempted to create a legally definitive boundary layer. Instead the idea is to maintain an integrated village/town/county/RPC/state boundary layer which provides for a reasonably accurate representation of these boundaries (refer to ARC_SRC and SRC_NOTES). BNDHASH includes all counties, towns, and villages listed in "Population and Local Government - State of Vermont - 2000" published by the Secretary of State. BNDHASH may include changes endorsed by the Legislature since the publication of this document in 2000 (eg: villages merged with towns). Utlimately the Vermont Secratary of State's Office and the VT Legislature are responsible for maintaining information which accurately describes the locations of these boundaries. BNDHASH should be used for general mapping purposes only. * Users who wish to determine which boundaries are different from the original TBHASH boundaries should refer to the ORIG_ARC field in the BOUNDARY_BNDHASH_LINE (line feature with attributes). Also, updates to BNDHASH are tracked by version number (ex: 2003A). The UPDACT field is used to track changes between versions. The UPDACT field is flushed between versions.(元数据链接) BNDHASH数据集描绘了佛蒙特州的村落、城镇、县及区域规划委员会（Regional Planning Commission，RPC）的边界。它是整合了多个数据源中通常为"最佳可用"的边界而成的复合数据集（具体可参阅ARC_SRC与SRC_NOTES属性）。不过，本数据集不旨在提供具有法律效力的官方边界。该图层最初由TBHASH开发而来，TBHASH是BNDHASH发布前的主VGIS城镇边界图层。通过将村落、城镇、县、区域规划委员会及州界整合为单一图层，VCGI实现了这些边界的垂直整合，并简化了维护工作。BNDHASH还包含了城镇、县及区域规划委员会名称的注记文本。BNDHASH包含以下要素类：1) BNDHASH_POLY_VILLAGES = 佛蒙特州村落边界；2) BNDHASH_POLY_TOWNS = 佛蒙特州城镇边界；3) BNDHASH_POLY_COUNTIES = 佛蒙特州县界；4) BNDHASH_POLY_RPCS = 佛蒙特州区域规划委员会辖区边界；5) BNDHASH_POLY_VTBND = 佛蒙特州州界；6) BNDHASH_LINE = 支撑所有面要素类的线型要素。主BNDHASH数据由VCGI以ESRI地理数据库（ESRI Geodatabase）要素数据集的形式进行管理。该数据集将村落、城镇、县、区域规划委员会及州界存储为独立的要素类，并通过一组拓扑规则（topology rules）绑定各要素，以此确保各类边界的垂直整合。VCGI将每年通过审查佛蒙特州档案管理局-州务卿办公室的档案来更新该图层。同时，VCGI欢迎VGIS用户提供已佐证的边界错误相关信息。注：VCGI并未尝试创建具有法律效力的官方边界图层。其初衷是维护一套整合的村落/城镇/县/区域规划委员会/州界图层，以合理准确地呈现这些边界（具体可参阅ARC_SRC与SRC_NOTES）。BNDHASH涵盖了州务卿办公室发布的《2000年佛蒙特州人口与地方政府》中列出的所有县、城镇及村落。BNDHASH可能包含2000年该文献发布后经州议会批准的边界变更（例如村落与城镇合并的情况）。最终，佛蒙特州州务卿办公室与佛蒙特州议会负责维护能够准确描述这些边界位置的信息。BNDHASH仅可用于常规制图用途。* 若用户希望查看与原始TBHASH边界存在差异的边界，可参阅BOUNDARY_BNDHASH_LINE（带属性的线型要素）中的ORIG_ARC字段。此外，BNDHASH的更新通过版本号进行追踪（例如2003A）。UPDACT字段用于追踪各版本间的变更，该字段会在版本更新时重置。