Islands NE of Brattstrand Bluff penguin GIS dataset

Aerial photography (35mm film) of penguin colonies was acquired over some islands north east of Brattstrand Bluff islands (Eric Woehler).The penguin colonies were traced, then digitised (John Cox), and saved as DXF-files.Using the ArcView extension 'Register and Transform' (Tom Velthuis), The DXF-files were brought into a GIS and transformed to the appropriate islands.Update May 2015 - This dataset has been rename from "Brattstrand Bluff penguin GIS dataset" to "Islands NE of Brattstrand Bluff penguin GIS dataset" to better describe the location of the colonies. The penguin colonies are on a small group of islands approximately 12km north east of Brattstrand Bluff. Latitude 69.148 south and longitude 77.268 east.The Data Centre does not have a copy of the original photographs or described GIS data. In May 2015, the Data Centre has attached the following to this record:The DXF file produced by John Cox by digitising the aerial photography. Note this document is not georeferenced.Four photographs taken in 2009 by Barbara Wienecke, Seabird Ecologist, showing penguin colonies on these islands.A shapefile exists of the digitised colonies. The digitising by Ursula Harris, Australian Antarctic Data Centre, was done by georeferencing the DXF drawing over unprocessed Quickbird Image 05NOV15042413-M1BS-052187281010_01_P002. It was done in two parts, the largest island and then the two smaller islands. This allowed for better matching. The accuracy of this data is unknown.

由Eric Woehler采集的布拉特斯特朗布拉夫群岛（Brattstrand Bluff Islands）东北部分岛屿的企鹅群落航空摄影采用35mm胶片完成。企鹅群落的轮廓经矢量化勾绘后由John Cox完成数字化处理，并保存为DXF文件。借助Tom Velthuis开发的ArcView扩展工具"Register and Transform"，上述DXF文件被导入地理信息系统（GIS），并转换至对应岛屿的坐标系中。2015年5月更新：本数据集原名称为"布拉特斯特朗布拉夫企鹅地理信息系统数据集"，现更名为"布拉特斯特朗布拉夫东北岛屿企鹅地理信息系统数据集"，以更准确地描述企鹅群落的分布位置。该企鹅群落坐落于布拉特斯特朗布拉夫东北约12公里的小型群岛上，地理坐标为南纬69.148°、东经77.268°。澳大利亚南极数据中心未留存原始摄影底片及原始地理信息系统数据副本。2015年5月，本数据中心为该数据集记录追加了以下内容：John Cox通过对航空摄影影像进行数字化处理生成的DXF文件，请注意该文件未经过地理配准。海鸟生态学家Barbara Wienecke于2009年拍摄的4张展示该群岛企鹅群落的照片。现有经数字化处理的企鹅群落Shapefile矢量文件。该数字化工作由澳大利亚南极数据中心的Ursula Harris完成：其将DXF绘图文件配准至未经过处理的快鸟（Quickbird）卫星影像05NOV15042413-M1BS-052187281010_01_P002之上，配准工作分为两个阶段完成——先处理最大的岛屿，再处理其余两座较小岛屿，以此提升匹配精度。本数据集的精度暂未可知。