VT Data - Village 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）本BNDHASH数据集描绘了佛蒙特州（Vermont）的村落、城镇、县及区域规划委员会（Regional Planning Commission, RPC）的边界范围。该数据集整合了来自多类数据源的通用「最佳可用」边界数据（相关信息请参阅ARC_SRC与SRC_NOTES属性字段）。但本数据集并非旨在提供具有法律效力的官方边界。
该图层最初源自TBHASH——在BNDHASH开发发布前，TBHASH是VGIS的官方城镇边界主图层。VCGI通过将村落、城镇、县、RPC及州界整合为单一图层，实现了各类边界的垂直整合，并简化了后续维护工作。BNDHASH数据集还包含城镇、县及RPC名称的注记文本。
BNDHASH包含以下要素类：
1) BNDHASH_POLY_VILLAGES：佛蒙特州村落范围
2) BNDHASH_POLY_TOWNS：佛蒙特州城镇范围
3) BNDHASH_POLY_COUNTIES：佛蒙特州县界范围
4) BNDHASH_POLY_RPCS：佛蒙特州区域规划委员会（RPC）管辖范围
5) BNDHASH_POLY_VTBND：佛蒙特州州界
6) BNDHASH_LINE：支撑所有多边形要素类的线要素
VCGI将BNDHASH主数据作为ESRI地理数据库（geodatabase）要素数据集进行管理。本数据集将村落、城镇、县、RPC及州界以独立要素类形式存储，并通过一组拓扑规则绑定各类要素，该架构保障了各类边界的垂直整合一致性。
VCGI将每年通过审阅佛蒙特州档案厅-州务卿办公室留存的档案记录，对该图层进行更新。VCGI同时欢迎VGIS用户提交经佐证的边界错误相关信息。
注意：VCGI并未尝试制作具有法律效力的官方边界图层，其目标是维护一套整合的村落/城镇/县/RPC/州界图层，以合理准确地呈现各类边界范围（相关说明请参阅ARC_SRC与SRC_NOTES字段）。
BNDHASH涵盖了州务卿办公室发布的"Population and Local Government - State of Vermont - 2000"中列出的全部县、城镇及村落。BNDHASH可能包含2000年该文献发布后，经佛蒙特州立法机构批准的边界变更（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立法机构负责维护能够准确描述各类边界位置的官方信息。
BNDHASH仅可用于通用制图用途。
* 若用户需查询与原始TBHASH边界存在差异的边界项，请参阅BOUNDARY_BNDHASH_LINE（带属性的线要素图层）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内容，且该字段会在版本更新时被清空重置。