Geology of the Cape Van Diemen

These data are a digital representation of information depicted on the printed map of the Cape Van Diemen 1:250 000 Geological Series produced by AGSO and the Geological Survey of Queensland (GSQ) in 1979.Data present include geological polygons (litho-stratigraphic units), linear structural features (faults, dykes, folds, trends, lineaments etc), and point features (mines, structural points etc). Polygons have a range of attributes extracted from each individual map including unit name, age and lithological description, while lines and points are feature coded according to the AGSO publication 'Symbols Used On Geological Maps' (BMR 1989). A standard look-up table of AGSO geological codes and associated descriptions is available (see ADDITIONAL METADATA).The data has gradually evolved from elementary CAD quality data into its present topologically structured GIS format, and hence has many imperfections and inconsistencies. Data has undergone rigorous validation and testing that includes over 80 different tests. See ADDITIONAL METADATA for more information on the data standards used.

本数据集为1979年由澳大利亚地质科学局（AGSO）与昆士兰州地质调查局（GSQ）编制的《范迪门角1:25万地质系列图》印刷版地图所承载信息的数字化复刻成果。数据集涵盖的要素包括地质多边形（岩性地层单元，litho-stratigraphic units）、线性构造特征（断层、岩脉、褶皱、构造走向、线性构造等）以及点状特征（矿山、构造点位等）。地质多边形附带从单幅地图中提取的多类属性字段，包括单元名称、形成时代与岩性描述；而线状与点状要素则依据AGSO发布的《地质图用图式》（BMR 1989）进行编码。AGSO地质编码及其对应描述的标准对照表可通过附加元数据（ADDITIONAL METADATA）章节查阅。该数据集最初为基础计算机辅助设计（CAD）格式数据，后逐步演进为当前的拓扑结构化地理信息系统（GIS）格式，因此仍存在诸多不完善与不一致之处。数据集已通过包含80余项不同测试在内的严格验证与检验。所用数据标准的详细信息可参阅附加元数据（ADDITIONAL METADATA）章节。