A Digital Elevation Model of McDonald Island derived from GeoEye-1 stereo imagery captured 19 May 2012

This dataset consists of:1 GeoEye-1 stereo imagery of an area of approximately 100 square kilometres including McDonald Island, captured 19 May 20122 A Digital Elevation Model (DEM) derived from the GeoEye-1 stereo imagery; and3 Image products derived from the most vertical dataset of the stereo imagery and orthorectified using the DEM.4 Contours generated from the DEM. The DEM was produced at a 1 metre pixel size and is available in ESRI grid, ESRI ascii and BIL formats.The DEM and image products are stored in a Universal Transverse Mercator zone 43 south projection, based on the WGS84 datum.The image products are geotiffs as follows.McDonald_Island_BGRN.tif: GeoEye-1 4-band multispectral (vis blue, green, red and Near Infrared), 2 metre resolution. McDonald_Island_PAN.tif: GeoEye-1 panchromatic, 0.5 metre resolution. McDonald_Island_PS_BGRN.tif: GeoEye-1 pansharpened, 4-band multispectral (vis blue, green, red and Near Infrared), 0.5 metre resolution. McDonald_Island_RGB.tif: GeoEye-1 pansharpened, natural colour enhancement, 0.5 metre resolution.

本数据集包含以下内容：
1. 2012年5月19日获取的GeoEye-1立体影像，覆盖面积约100平方公里，包含麦克唐纳岛；
2. 由GeoEye-1立体影像生成的数字高程模型（Digital Elevation Model, DEM）；
3. 基于立体影像中最垂直数据集生成，并经DEM正射校正的图像产品；
4. 由DEM生成的等高线。

该DEM的像素分辨率为1米，提供ESRI grid、ESRI ascii及BIL三种格式。
DEM与图像产品均采用基于WGS84基准面的通用横轴墨卡托投影43南带（Universal Transverse Mercator zone 43 south）坐标系存储。

图像产品为GeoTIFF格式，具体如下：

McDonald_Island_BGRN.tif：GeoEye-1四波段多光谱影像（可见光蓝波段、绿波段、红波段及近红外波段），分辨率2米。

McDonald_Island_PAN.tif：GeoEye-1全色影像，分辨率0.5米。

McDonald_Island_PS_BGRN.tif：GeoEye-1全色锐化四波段多光谱影像（可见光蓝波段、绿波段、红波段及近红外波段），分辨率0.5米。

McDonald_Island_RGB.tif：GeoEye-1全色锐化自然色彩增强影像，分辨率0.5米。