Australian Antarctic Territory Coastline 2003

The 'Australian Antarctic Territory coastline 2003' dataset is a digital vector representation of the coastline of Antarctica, between 45 to 160 degrees east, based on both the edge of permanent ice and grounding line, derived by means of remote sensing interpretation.A 'proof of concept' methodology over a test area was carried out to compare a number of complementary remote sensing techniques, including interferometry and airborne ice radar profiling, to confirm validation of grounding line as mapped from Landsat 7 ETM+ imagery. This methodology concept then served to validate grounding line locations elsewhere along the coast of the AAT.The National Mapping Division of Geoscience Australia and the Australian Antarctic Division developed this dataset as a joint project.Where available, Australian Antarctic Division supplied large-scale vector data of various areas around the AAT, which were included as part of the main coastline dataset. These included:* Holme Bay 1:25,000 GIS dataset* Larsemann Hills - Mapping from aerial photography captured February 1998* Rauer Group 1:50000 Topographic GIS Dataset* Vestfold Hills Topographic GIS Dataset* Windmill Islands 1:50000 Topographic GIS Dataset* Cape Denison and McKellar Islands GIS dataset from Ikonos satellite imageryRefer to the metadata record for each of these datasets for further information.The coastline dataset is comprised of three parts: one polygon coverage consisting of ice features, and another one consisting of coastal features. A third coverage consists of only island point features (islands too small to be shown as polygons).This dataset supersedes the Australian Antarctic Territory Coastline 2001 dataset which is also part of SCAR's Antarctic Digital Database (ADD) version 4 and version 5. It replaces data digitised from Landsat 4 and 5, with that from Landsat 7 ETM+, because of its more reliable positional accuracy and more recent acquisition.The Australian Antarctic Territory Coastline 2001 dataset and metadata record have been archived. Please contact the Australian Antarctic Data Centre if you would like a copy of this data and metadata.

“‘澳大利亚南极领地2003年海岸线’数据集是南极东经45°至160°区域海岸线的数字化矢量表达，基于永久冰边缘与冰架接地线（grounding line），通过遥感解译手段生成。

本研究在试验区采用概念验证（proof of concept）方法开展对比实验，对包括干涉测量与机载冰雷达剖面在内的多种互补遥感技术进行比对，以验证从Landsat 7 ETM+影像中解译得到的冰架接地线的准确性。该概念验证方法随后被用于验证澳大利亚南极领地（Australian Antarctic Territory, AAT）沿岸其他区域的冰架接地线位置。

本数据集由澳大利亚地球科学局（Geoscience Australia）国家测绘分部与澳大利亚南极署联合研发。澳大利亚南极署在可获取的前提下，提供了AAT周边多个区域的大比例尺矢量数据，作为本次主海岸线数据集的组成部分，具体包括：
* 霍姆湾1:25000地理信息系统（Geographic Information System, GIS）数据集
* 拉瑟曼丘陵——基于1998年2月航拍影像的测绘成果
* 劳尔群岛1:50000地形地理信息系统数据集
* 维斯特福尔丘陵地形地理信息系统数据集
* 温德米尔群岛1:50000地形地理信息系统数据集
* 基于Ikonos卫星影像获取的丹尼森角与麦凯勒群岛地理信息系统数据集

如需了解上述各数据集的详细信息，请查阅其对应的元数据记录。

本海岸线数据集由三部分构成：其一为包含冰体要素的多边形覆盖层，其二为包含海岸要素的多边形覆盖层，其三为仅包含岛屿点要素的覆盖层（针对面积过小无法以多边形形式展示的岛屿）。

本数据集取代了《澳大利亚南极领地2001年海岸线》数据集，该数据集同时也是南极研究科学委员会（Scientific Committee on Antarctic Research, SCAR）南极数字数据库（Antarctic Digital Database, ADD）第4版与第5版的组成部分。本次更新以Landsat 7 ETM+影像数据取代了此前从Landsat 4、5影像中数字化获取的数据，原因在于Landsat 7 ETM+具备更可靠的位置精度与更新的成像时间。

《澳大利亚南极领地2001年海岸线》数据集及其元数据记录已完成归档。如需获取该数据及元数据副本，请联系澳大利亚南极数据中心（Australian Antarctic Data Centre）。