Pilbara Block 1:100 000 Landsat-5-TM image maps. Image files in BIL format

These images are clipped to represent the 1:100 000 map sheet they fall within as per the topographic series. For example, the image im2855.bil covers the same area as the Marble Bar (2855) topographic map. There are 51 individual sheets in total. The data was clipped from the larger mosaic of original Landsat scenes processed using:Directed Principal Components/Band Ratio Image:RGB pc2[4/3 : 5/7] : 5/4 : 1+ 7Expressing relationships between:hydrosilicates/clay/carbonate: iron oxide : quartz

本数据集内的所有影像均已裁切，以匹配其所属的地形系列（topographic series）标准下的1:10万比例尺图幅。例如，im2855.bil影像的覆盖范围与马布尔巴（Marble Bar，2855）地形图完全一致。本数据集总计包含51个独立图幅。该数据源自经以下流程处理的原始陆地卫星（Landsat）影像镶嵌大图的裁切结果：采用定向主成分/波段比影像（Directed Principal Components/Band Ratio Image）合成方案，RGB通道依次为pc2[4/3 : 5/7]、5/4、1+7，该合成方式用于表达含水硅酸盐（hydrosilicates）/黏土/碳酸盐（carbonate）、氧化铁（iron oxide）与石英（quartz）三者间的光谱关联。