Geoscience Australia 250K Topographic Cartographic Masks

## **Abstract** \n\nThe dataset was derived by the Bioregional Assessment Programme. This dataset was derived from multiple datasets. You can find a link to the parent datasets in the Lineage Field in this metadata statement. The History Field in this metadata statement describes how this dataset was derived.\n\n\n\nThis dataset contains cartographic masks from the Geoscience Australia Topographic 250K series 3 data (GUID: a0650f18-518a-4b99-a553-44f82f28bb5f).\n\n\n\nhttp://www.ga.gov.au/metadata-gateway/metadata/record/gcat_a05f7892-ecbd-7506-e044-00144fdd4fa6/GEODATA+TOPO+250K+Series+3+%28Packaged+-+Shape+file+format%29\n\n## **Purpose** \n\nThis mask has been developed to readily differentiate onshore and offshore areas thus allowing clear representation of data in the map by masking the offshore areas.\n\nThese masks can be used in cartographic products to tidy overlapping layers or help display labels.\n\n## **Dataset History** \n\nThe Mainlands and Islands layers from the Geoscience Australia Topographic 250K series 3 data (https://data.bioregionalassessments.gov.au/datastore/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f) were clipped from an arbitrary rectangular extent of Australia with the following bounding coordinates:\n\n\n\nNorth: -4.40394403624746\n\nWest: 106.974907459776\n\nEast: 162.47047360971\n\nSouth: -50.4276192467119\n\n\n\nThe mask area shows the non-land surface of Australia.\n\n## **Dataset Citation** \n\nBioregional Assessment Programme (2014) Geoscience Australia 250K Topographic Cartographic Masks. Bioregional Assessment Derived Dataset. Viewed 13 March 2019, http://data.bioregionalassessments.gov.au/dataset/c4adaa38-ed6d-4500-9970-0a05a9f72ac4.\n\n## **Dataset Ancestors** \n\n* **Derived From** [GEODATA TOPO 250K Series 3](https://data.gov.au/data/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f)\n\n

## **摘要**

本数据集由生物区域评估计划（Bioregional Assessment Programme）衍生而来，源自多个数据集。您可在本元数据声明的谱系字段（Lineage Field）中找到父数据集的链接，历史字段（History Field）则描述了本数据集的衍生过程。

本数据集包含来自澳大利亚地球科学局（Geoscience Australia）25万比例尺地形图系列3数据（GUID：a0650f18-518a-4b99-a553-44f82f28bb5f）的制图掩膜（cartographic masks）。

http://www.ga.gov.au/metadata-gateway/metadata/record/gcat_a05f7892-ecbd-7506-e044-00144fdd4fa6/GEODATA+TOPO+250K+Series+3+%28Packaged+-+Shape+file+format%29

## **用途**

开发该掩膜旨在快速区分陆上与海上区域，通过遮蔽海上区域使地图中的数据呈现更清晰。

这些掩膜可用于制图产品中，以整理重叠图层或辅助标签显示。

## **数据集历史**

澳大利亚地球科学局25万比例尺地形图系列3数据（https://data.bioregionalassessments.gov.au/datastore/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f）中的大陆与岛屿图层，是从澳大利亚任意矩形范围中裁剪而来，其边界坐标如下：

北：-4.40394403624746

西：106.974907459776

东：162.47047360971

南：-50.4276192467119

掩膜区域显示的是澳大利亚的非陆地表面。

## **数据集引用**

生物区域评估计划（Bioregional Assessment Programme）（2014）. 澳大利亚地球科学局25万比例尺地形图制图掩膜. 生物区域评估衍生数据集. 查阅日期：2019年3月13日，http://data.bioregionalassessments.gov.au/dataset/c4adaa38-ed6d-4500-9970-0a05a9f72ac4.

## **数据集祖先**

* **衍生自** [GEODATA TOPO 250K Series 3](https://data.gov.au/data/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f)