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 是维克地图地形专题（Vicmap Topographic Themes，VTT）数据集产品的组成部分。该数据集为FOI_INDEX_EXTENT的超集，涵盖各要素实例的当前状态与已废弃状态。其支持要素版本控制（RETIRE_DATE_UFI），并可实现要素编辑链式关联（UFI_OLD）。本数据集亦为VTT兴趣要素（Features of Interest）数据集的组成部分，涵盖维多利亚州内全部兴趣要素记录的多边形范围。无论兴趣要素是由点、线还是多边形要素衍生而来，本数据集均对所有要素仅存储一次。