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是Vicmap地形主题（VTT）产品的一部分。该数据集是FOI_INDEX_EXTENT的超集，包含每个要素实例的当前状态与已停用状态。它支持要素版本控制（RETIRE_DATE_UFI）并实现要素编辑链（UFI_OLD）。作为VTT兴趣要素数据集的组成部分，其涵盖维多利亚州内所有兴趣要素记录的多边形范围，无论这些要素源自点、线还是多边形类型，每个要素仅保留一次。