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 属于维多利亚地图地形专题（Vicmap Topographic Themes，缩写VTT）产品的一部分。本数据集为FOI_INDEX_EXTENT的超集，包含每个要素实例的当前状态与退役状态。其支持要素版本控制（RETIRE_DATE_UFI），并可实现要素编辑链功能（UFI_OLD）。本数据集隶属于VTT兴趣要素（Features of Interest, FOI）数据集，为维多利亚州内全部兴趣要素记录的多边形范围。无论要素源自点、线还是多边形要素，本数据集均仅存储各要素一次。