Australian Mineral Blocks 2014 - Geodatabase

Australian Mineral Blocks (2014) - Aligned with the current Australian Maritime Boundary Dataset (AMB2014).ESRI Geodatabase.The dataset was created by Geoscience Australia using the framework described in Section 17 of the Offshore Minerals Act 1994.The international, scheduled areas and coastal waters used in this dataset are those found in the current Australian Maritime Boundary Dataset 2014 (AMB2014).The dataset is comprised of both polygons and points created to very high precision, accurate to within millimetres.The blocks have been cut by Australia's international boundaries, the scheduled areas and the coastal waters. Each block is assigned a polygon, including partial blocks. All blocks are titled with their block ID, and a list of vertices that make up the blocks. Each vertex of the dataset is also replicated as a discrete point in the points dataset.The design of the dataset allows for the exact location of every vertex to be known to millimetre precision. The corner coordinates of blocks are now defined to a high precision, and can be found by querying the appropriate point.The blocks are attributed with fields containing information on: Block ID Parent 1 Million Mapsheet Offshore Area Epoch of the boundaries used to cut the data AMB2014 Datum Origin of the mapsheet in AGD66 The position of all vertices in the block The number of vertices in the block The area of the block in acres The area of the block in hectaresThe calculation used to find the area of the blocks is estimated to be precise to better than 1%. This is considered to be sufficient as under the permit and licensing arrangements in the Offshore Minerals Act, the area of a block has no relevance. Therefore the area figure is provided solely for reference.澳大利亚矿物区块（2014年版）——与现行《澳大利亚海洋边界数据集（AMB2014）》对齐。ESRI地理数据库（ESRI Geodatabase）。 本数据集由澳大利亚地质科学局（Geoscience Australia）依据《1994年近海矿物法》第17条所述框架编制完成。本数据集所采用的国际海域、规划海域及近海水域，均取自现行2014版澳大利亚海洋边界数据集（AMB2014）。 数据集包含多边形与点要素两类数据，均经过毫米级高精度构建。所有区块均已通过澳大利亚国际边界、规划海域及近海水域完成裁切，涵盖完整区块与部分区块。每个区块均对应唯一多边形要素，并以区块ID命名，同时附带构成该区块的顶点列表。本数据集的每个顶点亦作为独立点要素存储于点要素数据集中。 本数据集的设计可确保每个顶点的位置精度可达毫米级，区块的角点坐标可通过查询对应点要素获取高精度结果。 区块附带以下属性字段信息： - 区块ID - 所属1:100万母图幅 - 近海海域 - 裁切数据所用边界的参考历元：AMB2014 - 大地基准 - AGD66大地基准下的图幅原点 - 区块内所有顶点的坐标 - 区块顶点总数 - 区块面积（英亩） - 区块面积（公顷） 本数据集的区块面积计算精度优于1%。鉴于《1994年近海矿物法》规定的许可与授权机制中，区块面积并无实质关联，因此该面积数值仅作参考之用。