Australian Petroleum Blocks 2014a - Geodatabase

The dataset was created by Geoscience Australia using the framework described in Section 33 of the Offshore Petroleum and Greenhouse Gas Storage Act 2006 (OPGGS Act) and previous Acts.The international, scheduled areas and coastal waters used in this dataset are those found in the current Australian Maritime Boundary Dataset 2014 (AMB2014a). This version contains a number of technical amendments made on the basis of user feedback. These include:- Removal of lease AC/P17- Harmonisation of maritime boundaries, scheduled area and graticular block datasets in block SC51The 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.Existing production licences AC/RL4, and AC/RL5 are included in the dataset.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 OPGGS Act, the area of a block has no relevance. Therefore the area figure is provided solely for reference.本数据集由澳大利亚地质科学局（Geoscience Australia）依据《2006年近海石油与温室气体储存法案》（Offshore Petroleum and Greenhouse Gas Storage Act，简称OPGGS法案）第33条及此前相关法案规定的框架编制而成。 本数据集所使用的国际划定区域及沿海水域数据，均取自最新版《2014年澳大利亚海洋边界数据集》（Australian Maritime Boundary Dataset 2014，简称AMB2014a）。 本次版本结合用户反馈进行了多项技术修正，具体包括： - 移除租约AC/P17 - 协调SC51区块内的海洋边界、划定区域及经纬格区块数据集 本数据集包含高精度多边形与点数据，定位精度可达毫米级。区块已按照澳大利亚国际边界、划定区域及沿海水域进行裁切，每个区块（含部分区块）均分配有对应多边形。所有区块均以区块ID及构成区块的顶点列表进行命名。数据集内的每个顶点同时作为离散点存储于点数据集中。 本数据集的设计可确保每个顶点的精确位置均可达毫米级精度。区块的角点坐标现已实现高精度定义，可通过查询对应点数据获取。 数据集中包含已核发的生产许可证AC/RL4与AC/RL5相关区块。 区块附带以下属性信息： - 区块ID - 父级百万分幅地图图幅 - 近海区域 - 用于裁切数据的边界纪元：AMB2014 - 大地基准面（Datum） - AGD66坐标系（Australian Geodetic Datum 1966）下的图幅原点 - 区块内所有顶点的位置 - 区块内顶点数量 - 区块面积（英亩） - 区块面积（公顷） 区块面积的计算精度优于1%。考虑到《OPGGS法案》框架下的许可与授权管理规定中，区块面积无实际关联意义，因此该面积数值仅作参考用途。