Estuarine Macrophytes of Hunter Subregion NSW DPI Hunter 2004

## **Abstract** \n\nThis dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied:\n\n\n\nDistribution and abundance of seagrass, mangrove and saltmarsh the Hunter Subregion\n\n## **Dataset History** \n\nThis dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied.\n\n\n\nData Collection Method: Aerial photography interpretation.\n\nData Set Source: The data has been prepared from Land and Property Information photo runs.\n\nSource Material Input Scale: 1:25 000\n\nAdditional Processing Steps: The aerial photographs were scanned into TIFF format files and imported into ERDAS IMAGINE as image files for orthorectification. The digital images were orthorectified using a Digital Elevation Model and Digital Topographic Database provided by Land and Property Information. Seagrass, mangrove and saltmarsh boundaries were digitised and edited in ArcGIS \n\nAll data was mapped at a scale of 1:1500 derived from orthorectified aerial photographs with a positional accuracy of less than 10 metres. \n\n\n\nVegetation boundaries were identified on orthorectified aerial photographs. Boundary location and species identification were verified in the field. Families or in some case species of vegetation were mapped in the following categories:Posidonia australis Zosteraceae (including Zostera capricorni, Zostera muelleri and Heterozostera tasmanica), Halophila spp. Ruppia megacarpa, mangrove (Avicennia marina, Aegiceras corniculatum, and saltmarsh (all species combined). Area calculations were determined in ArcGIS.\n\nAll polygons were visibly checked for accurate class allocation, all polygons are labeled. All polygons are topologically consistent\n\n\n\nCompleted 2009 for the attributes listed in the estuary of the study.\n\n## **Dataset Citation** \n\nNSW Department of Primary Industries (2016) Estuarine Macrophytes of Hunter Subregion NSW DPI Hunter 2004. Bioregional Assessment Source Dataset. Viewed 13 March 2019, http://data.bioregionalassessments.gov.au/dataset/fb7bf5a0-f0e3-429b-9b54-0d4b58fb49c2.

## **摘要（Abstract）**

本数据集及其元数据声明由第三方提供给生物区域评估计划（Bioregional Assessment Programme），本文按原始提交版本呈现：

亨特次区域海草、红树林与盐沼的分布与丰度

## **数据集历史（Dataset History）**

本数据集及其元数据声明由第三方提供给生物区域评估计划，本文按原始提交版本呈现。

数据采集方法：航空摄影解译。

数据集来源：数据由新南威尔士土地与房产信息局（Land and Property Information）的航空摄影航片制作而成。

源材料输入比例尺：1:25000

附加处理步骤：将航空摄影照片扫描为TIFF格式文件，并作为影像文件导入ERDAS IMAGINE以进行正射校正。利用新南威尔士土地与房产信息局提供的数字高程模型（Digital Elevation Model）与数字地形数据库（Digital Topographic Database）对数字影像进行正射校正。在ArcGIS中对海草、红树林与盐沼的边界进行数字化与编辑。

所有数据基于正射校正后的航空摄影照片成图，比例尺为1:1500，点位精度低于10米。

在正射校正后的航空摄影照片上识别植被边界，并通过野外调查验证边界位置与物种鉴定结果。植被类群（部分为具体物种）按以下类别成图：澳大利亚波喜荡草（Posidonia australis）所属的大叶藻科（Zosteraceae，含窄叶大叶藻Zostera capricorni、穆勒大叶藻Zostera muelleri与塔斯马尼亚异叶藻Heterozostera tasmanica）、喜盐草属（Halophila spp.）、大果丝粉藻（Ruppia megacarpa）、红树林（含白骨壤Avicennia marina、蜡烛果Aegiceras corniculatum）以及盐沼（所有盐沼物种合并）。面积计算在ArcGIS中完成。

所有多边形均经目视检查以确保类别分配准确，所有多边形均已标注且拓扑关系一致。

本数据集于2009年针对研究河口的预设属性完成编制。

## **数据集引用（Dataset Citation）**

新南威尔士州 primary industries 部（NSW Department of Primary Industries，2016）：《亨特次区域河口大型水生植物（Estuarine Macrophytes of Hunter Subregion NSW DPI Hunter 2004）》，生物区域评估源数据集。2019年3月13日查阅，http://data.bioregionalassessments.gov.au/dataset/fb7bf5a0-f0e3-429b-9b54-0d4b58fb49c2。