Vicmap Topographic Themes - Features of Interest (FOI) Index Extent Polygon

VTT_FOI_INDEX_EXTENT is part of the Vicmap Topographic Themes (VTT) prooduct. This dataset is a superset of FOI_INDEX_EXTENT and includes the current and retired states of each feature instance. It supports feature versioning (RETIRE_DATE_UFI) and enables feature edit chaining (UFI_OLD).Part of the VTT Features of Interest datasetPolygon extent of ALL features of interest records within Victoria. It holds ALL features ONCE regardless of whether they were derived from a point, line or polygon feature.

VTT_FOI_INDEX_EXTENT 属于 Vicmap 地形主题（Vicmap Topographic Themes, VTT）数据集产品的组成部分。该数据集是 FOI_INDEX_EXTENT 的超集，囊括各要素实例的当前状态与已退役状态，支持要素版本管控（RETIRE_DATE_UFI）并可实现要素编辑链路追踪（UFI_OLD）。本数据集隶属于 VTT 兴趣要素（Features of Interest, FOI）数据集范畴，包含维多利亚州境内全部兴趣要素记录的多边形范围，且无论原始要素源自点、线还是多边形要素，该数据集均仅存储各要素一次。