GAL Hydrochemistry Formations QC for TDS v02 Surfaces

## **Abstract** \n\nThis dataset was derived by the Bioregional Assessment Programme. The parent datasets are identified in the Lineage field in this metadata statement. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement.\n\n\n\nThis dataset contains raster representations of Total Dissolved Solid (TDS) measurement trends in groundwater samples for each hydrogeological formation in the Galilee Basin subregion. \n\n\n\nThe dataset also contains supplementary polygon Feature Classes for each formation, to be used in the visualisation of the rasters. For each formation this includes: \n\na) A rectangular data extent polygon feature class - created based on the distribution of data points for each formation and used to define the extent of the each raster \n\nb) Data extent mask - further defines the extent of data distribution as well as the spatial extent of the formation, used to visualise the TDS trends for each formation only within the formation boundary and near the spread of point data.\n\n## **Purpose** \n\nProvides a visual representation for use in maps, of TDS measurement trends in groundwater for each hydrogeological formation in the Galilee Basin subregion.\n\n## **Dataset History** \n\nThe raster layers within this dataset were created using the 'Topo to Raster' interpolation method in ArcGIS. Topo to Raster uses an iterative finite difference interpolation technique. This method is preferred for map and visualisation purposes, especially in sparse data regions, as surface continuity is not compromised at a global level. This results in raster layers with smooth surfaces and trends for any level of data density, and surface continuity between areas of varying density.\n\n\n\nRaster layers and polygon Feature Classes were created from the source point Feature Classes (dataset: GAL Hydrochemistry Formations QC for TDS v02 GIS - GUID: 109a21cd-a167-4320-84be-ab56cfc12cee)\n\n\n\nFormation Data Extent polygons: An arbitrary rectangular polygon was created around the extent of points contained in each source point Feature Class\n\n\n\nFormation Data Extent Mask: a hole was clipped from the Formation Data Extent polygon. The Eastern boundary of each hole was traced from the equivalent formation polygon found within the Galilee Groundwater Model, Hydrogeological Formation Extents v01 dataset (GUID: 5afbf7f1-1ee0-444b-9f77-dbad8d8de95b), while the western, northern and southern extent was defined by the distribution of point data or the Galilee subregion boundary (Bioregional Assessment areas v03, GUID: 96dbf469-5463-4f4d-8fad-4214c97e5aac).\n\n\n\nTopo to Raster parameters\n\nInput feature data = respective point feature class from source dataset\n\nField = TDS\n\nType = Point Elevation\n\nOutput cell size = 0.001\n\nOutput extent = Formation data extent polygon Feature Class\n\nSmallest z value to be used in interpolation = smallest TDS value of input point Feature Class\n\nLargest z value to be used in interpolation = largest TDS value of input point Feature Class\n\nDrainage enforcement = NO_ENFORCE\n\nPrimary type of input data = SPOT\n\n\n\nAll other parameters left as default.\n\n## **Dataset Citation** \n\nBioregional Assessment Programme (XXXX) GAL Hydrochemistry Formations QC for TDS v02 Surfaces. Bioregional Assessment Derived Dataset. Viewed 11 April 2016, http://data.bioregionalassessments.gov.au/dataset/ff165a41-f7f3-4922-870e-6837fd40f228.\n\n## **Dataset Ancestors** \n\n* **Derived From** [QLD Dept of Natural Resources and Mines, Groundwater Entitlements 20131204](https://data.gov.au/data/dataset/fd59894f-06b0-4c6f-9029-488934cfa7ba)\n\n* **Derived From** [GAL Hydrochemistry Formations QC for TDS v02](https://data.gov.au/data/dataset/d70448e7-79b5-48a4-930f-b9492184ed5b)\n\n* **Derived From** [GAL Aquifer Formation Extents v01](https://data.gov.au/data/dataset/e77f61d8-86d1-442a-a6ba-4256ae470595)\n\n* **Derived From** [GAL Aquifer Formation Extents v02](https://data.gov.au/data/dataset/be0a97f2-ddfd-4d3a-9d6d-522bf34b559f)\n\n* **Derived From** [Carmichael Coal Mine and Rail Project Environmental Impact Statement](https://data.gov.au/data/dataset/2a595f74-aae6-4d83-9cd7-1459247d751a)\n\n* **Derived From** [QLD Hydrochemistry QA QC GAL v02](https://data.gov.au/data/dataset/e3fb6c9b-e224-4d2e-ad11-4bcba882b0af)\n\n* **Derived From** [Bioregional Assessment areas v03](https://data.gov.au/data/dataset/96dbf469-5463-4f4d-8fad-4214c97e5aac)\n\n* **Derived From** [GAL Hydrochemistry Formations QC for TDS v01](https://data.gov.au/data/dataset/2e03c68b-dc32-4ac0-b4b3-314856232b1e)\n\n* **Derived From** [QLD Dept of Natural Resources and Mines, Groundwater Entitlements linked to bores v3 03122014](https://data.gov.au/data/dataset/68bbd3fb-6e2a-4088-a3dd-55cc44c2f0d6)\n\n* **Derived From** [GEODATA TOPO 250K Series 3, File Geodatabase format (.gdb)](https://data.gov.au/data/dataset/96ebf889-f726-4967-9964-714fb57d679b)\n\n* **Derived From** [RPS Galilee Hydrogeological Investigations - Appendix tables B to F (original)](https://data.gov.au/data/dataset/bfe35a54-7a71-45ec-b20e-f3bfcc8999ef)\n\n* **Derived From** [GEODATA TOPO 250K Series 3](https://data.gov.au/data/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f)\n\n* **Derived From** [NSW Catchment Management Authority Boundaries 20130917](https://data.gov.au/data/dataset/0dc4272e-c081-4ed4-9645-aa336ffacd85)\n\n* **Derived From** [Geological Provinces - Full Extent](https://data.gov.au/data/dataset/0a064b3b-2a1e-4672-80d9-03333be67aad)\n\n* **Derived From** [Phanerozoic OZ SEEBASE v2 GIS](https://data.gov.au/data/dataset/26e0fbd9-d8d0-4212-be52-ca317e27b3bd)\n\n* **Derived From** [QLD Department of Natural Resources and Mining Groundwater Database Extract 20131111](https://data.gov.au/data/dataset/827e70b3-29d5-4e89-8d59-a93bc499de60)\n\n* **Derived From** [QLD DNRM Hydrochemistry with QA/QC](https://data.gov.au/data/dataset/4472af17-1470-4e7a-ae1d-9fc6443d9e1d)\n\n* **Derived From** [GAL Hydrochemistry Formations QC for TDS v02 GIS](https://data.gov.au/data/dataset/109a21cd-a167-4320-84be-ab56cfc12cee)\n\n* **Derived From** [Galilee Groundwater Model, Hydrogeological Formation Extents v01](https://data.gov.au/data/dataset/5afbf7f1-1ee0-444b-9f77-dbad8d8de95b)\n\n* **Derived From** [Queensland petroleum exploration data - QPED](https://data.gov.au/data/dataset/cb357721-bf22-45c9-a82e-828807912dd4)\n\n* **Derived From** [Natural Resource Management (NRM) Regions 2010](https://data.gov.au/data/dataset/1d54e38f-4051-4f0c-a350-c7dbd8eba65b)\n\n* **Derived From** [Three-dimensional visualisation of the Great Artesian Basin - GABWRA](https://data.gov.au/data/dataset/98e49f7c-28a6-4ad1-83c7-fdf606954fbc)\n\n* **Derived From** [QLD Department of Natural Resources and Mining Groundwater Database Extract 20142808](https://data.gov.au/data/dataset/a5c5cbdb-1152-43f7-9533-a123027b7ce1)\n\n* **Derived From** [Bioregional Assessment areas v01](https://data.gov.au/data/dataset/0fd0d820-30b3-451f-a126-a50040426999)\n\n* **Derived From** [Bioregional Assessment areas v02](https://data.gov.au/data/dataset/e414b1b3-c42e-42e9-9cc4-2093054aa35f)\n\n* **Derived From** [Queensland Geological Digital Data - Detailed state extent, regional. November 2012](https://data.gov.au/data/dataset/03ea9d87-55f1-400e-86c0-b8f7492984c4)\n\n* **Derived From** [Geoscience Australia, 1 second SRTM Digital Elevation Model (DEM)](https://data.gov.au/data/dataset/9a9284b6-eb45-4a13-97d0-91bf25f1187b)\n\n

**摘要**
本数据集由生物区域评估计划（Bioregional Assessment Programme）衍生而来。其父级数据集已在本元数据（metadata）声明的谱系（Lineage）字段中注明，生成该衍生数据集的具体流程已在本元数据声明的历史（History）字段中详述。

本数据集包含加利利盆地次区域（Galilee Basin subregion）内各水文地质地层（hydrogeological formation）的地下水样总溶解固体（Total Dissolved Solid, TDS）浓度变化趋势栅格表达结果。

本数据集还包含针对各地层的补充多边形要素类（Feature Classes），用于栅格数据的可视化展示。针对每个地层，该补充要素类包括：
a) 矩形数据范围要素类——基于各地层的数据源点分布创建，用于定义各栅格数据的空间范围
b) 数据范围掩膜（Data extent mask）——进一步限定数据分布范围以及地层的空间范围，用于仅在地层边界及测点分布附近区域可视化各地层的TDS浓度变化趋势。

**用途**
为加利利盆地次区域内各水文地质地层的地下水TDS浓度变化趋势提供可用于地图制作的可视化表达成果。

**数据集历史**
本数据集内的栅格图层通过ArcGIS中的Topo to Raster插值工具创建。Topo to Raster采用迭代有限差分插值技术，该方法因可在全局层面保证表面连续性，在地图制作与可视化场景中（尤其是数据稀疏区域）更受青睐，可生成适配任意数据密度的平滑表面与变化趋势栅格图层，且不同数据密度区域间的表面连续性得以保留。

栅格图层与多边形要素类均由源点要素类（数据集：GAL Hydrochemistry Formations QC for TDS v02 GIS - GUID: 109a21cd-a167-4320-84be-ab56cfc12cee）创建而来。

地层数据范围多边形：针对每个源点要素类包含的测点范围，创建一个任意矩形多边形。

地层数据范围掩膜：从地层数据范围多边形中裁剪出一个孔洞。该孔洞的东边界由加利利地下水模型v01数据集（Hydrogeological Formation Extents v01，GUID: 5afbf7f1-1ee0-444b-9f77-dbad8d8de95b）中对应的地层多边形提取得到，而西、北、南边界则由测点分布范围或加利利次区域边界（生物区域评估区域v03，GUID: 96dbf469-5463-4f4d-8fad-4214c97e5aac）确定。

Topo to Raster参数设置如下：
输入要素数据 = 源数据集中对应的点要素类
字段 = TDS
类型 = 点高程（Point Elevation）
输出像元大小 = 0.001
输出范围 = 地层数据范围要素类
插值所用最小Z值 = 输入点要素类的最小TDS值
插值所用最大Z值 = 输入点要素类的最大TDS值
排水强制 = 不强制（NO_ENFORCE）
输入数据主要类型 = 单点（SPOT）
其余参数均保留默认设置。

**数据集引用**
生物区域评估计划（Bioregional Assessment Programme）(XXXX) GAL Hydrochemistry Formations QC for TDS v02 Surfaces. 生物区域评估计划衍生数据集。查阅日期：2016年4月11日，http://data.bioregionalassessments.gov.au/dataset/ff165a41-f7f3-4922-870e-6837fd40f228.

**数据集上游来源**
* 衍生自 [QLD Dept of Natural Resources and Mines, Groundwater Entitlements 20131204](https://data.gov.au/data/dataset/fd59894f-06b0-4c6f-9029-488934cfa7ba)
* 衍生自 [GAL Hydrochemistry Formations QC for TDS v02](https://data.gov.au/data/dataset/d70448e7-79b5-48a4-930f-b9492184ed5b)
* 衍生自 [GAL Aquifer Formation Extents v01](https://data.gov.au/data/dataset/e77f61d8-86d1-442a-a6ba-4256ae470595)
* 衍生自 [GAL Aquifer Formation Extents v02](https://data.gov.au/data/dataset/be0a97f2-ddfd-4d3a-9d6d-522bf34b559f)
* 衍生自 [Carmichael Coal Mine and Rail Project Environmental Impact Statement](https://data.gov.au/data/dataset/2a595f74-aae6-4d83-9cd7-1459247d751a)
* 衍生自 [QLD Hydrochemistry QA QC GAL v02](https://data.gov.au/data/dataset/e3fb6c9b-e224-4d2e-ad11-4bcba882b0af)
* 衍生自 [Bioregional Assessment areas v03](https://data.gov.au/data/dataset/96dbf469-5463-4f4d-8fad-4214c97e5aac)
* 衍生自 [GAL Hydrochemistry Formations QC for TDS v01](https://data.gov.au/data/dataset/2e03c68b-dc32-4ac0-b4b3-314856232b1e)
* 衍生自 [QLD Dept of Natural Resources and Mines, Groundwater Entitlements linked to bores v3 03122014](https://data.gov.au/data/dataset/68bbd3fb-6e2a-4088-a3dd-55cc44c2f0d6)
* 衍生自 [GEODATA TOPO 250K Series 3, File Geodatabase format (.gdb)](https://data.gov.au/data/dataset/96ebf889-f726-4967-9964-714fb57d679b)
* 衍生自 [RPS Galilee Hydrogeological Investigations - Appendix tables B to F (original)](https://data.gov.au/data/dataset/bfe35a54-7a71-45ec-b20e-f3bfcc8999ef)
* 衍生自 [GEODATA TOPO 250K Series 3](https://data.gov.au/data/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f)
* 衍生自 [NSW Catchment Management Authority Boundaries 20130917](https://data.gov.au/data/dataset/0dc4272e-c081-4ed4-9645-aa336ffacd85)
* 衍生自 [Geological Provinces - Full Extent](https://data.gov.au/data/dataset/0a064b3b-2a1e-4672-80d9-03333be67aad)
* 衍生自 [Phanerozoic OZ SEEBASE v2 GIS](https://data.gov.au/data/dataset/26e0fbd9-d8d0-4212-be52-ca317e27b3bd)
* 衍生自 [QLD Department of Natural Resources and Mining Groundwater Database Extract 20131111](https://data.gov.au/data/dataset/827e70b3-29d5-4e89-8d59-a93bc499de60)
* 衍生自 [QLD DNRM Hydrochemistry with QA/QC](https://data.gov.au/data/dataset/4472af17-1470-4e7a-ae1d-9fc6443d9e1d)
* 衍生自 [GAL Hydrochemistry Formations QC for TDS v02 GIS](https://data.gov.au/data/dataset/109a21cd-a167-4320-84be-ab56cfc12cee)
* 衍生自 [Galilee Groundwater Model, Hydrogeological Formation Extents v01](https://data.gov.au/data/dataset/5afbf7f1-1ee0-444b-9f77-dbad8d8de95b)
* 衍生自 [Queensland petroleum exploration data - QPED](https://data.gov.au/data/dataset/cb357721-bf22-45c9-a82e-828807912dd4)
* 衍生自 [Natural Resource Management (NRM) Regions 2010](https://data.gov.au/data/dataset/1d54e38f-4051-4f0c-a350-c7dbd8eba65b)
* 衍生自 [Three-dimensional visualisation of the Great Artesian Basin - GABWRA](https://data.gov.au/data/dataset/98e49f7c-28a6-4ad1-83c7-fdf606954fbc)
* 衍生自 [QLD Department of Natural Resources and Mining Groundwater Database Extract 20142808](https://data.gov.au/data/dataset/a5c5cbdb-1152-43f7-9533-a123027b7ce1)
* 衍生自 [Bioregional Assessment areas v01](https://data.gov.au/data/dataset/0fd0d820-30b3-451f-a126-a50040426999)
* 衍生自 [Bioregional Assessment areas v02](https://data.gov.au/data/dataset/e414b1b3-c42e-42e9-9cc4-2093054aa35f)
* 衍生自 [Queensland Geological Digital Data - Detailed state extent, regional. November 2012](https://data.gov.au/data/dataset/03ea9d87-55f1-400e-86c0-b8f7492984c4)
* 衍生自 [Geoscience Australia, 1 second SRTM Digital Elevation Model (DEM)](https://data.gov.au/data/dataset/9a9284b6-eb45-4a13-97d0-91bf25f1187b)