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首页> 外文期刊>Arctic: Journal of the Arctic Institute of North America >Detection and classification of muskox habitat on Banks Island, Northwest Territories, Canada, using landsat thematic mapper data
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Detection and classification of muskox habitat on Banks Island, Northwest Territories, Canada, using landsat thematic mapper data

机译：使用Landat专题制图仪数据对加拿大西北地区班克斯岛的麝香鼠栖息地进行检测和分类

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The feasibility of using Landsat Thematic Mapper data for mapping muskox summer habitat was tested on northern Banks Island, Northwest Territories. Digital image enhancement and classification techniques were examined to determine if summer foraging habitats could be detected and mapped using Thematic Mapper imagery. Interpretations of the satellite data were verified in the field during the summers of 1988 and 1989. The most important summer foraging habitats for muskoxen included the wet sedge meadow, graminoid tundra and graminoid/dwarf shrub tundra cover types. These lowland habitats were generally distinguishable on enhanced colour images and were easily differentiated from upland areas. The most suitable colour composite for differentiating muskox summer habitats was the near-infrared (band 4), shortwave infrared (band 5) and red (band 3) spectral bands displayed in red, green and blue respectively. Upland cover types, including dwarf shrub tundra, hummocky tundra and dwarf shrub/lichen barrens, were more difficult to differentiate because of spectral variability resulting from differences in plant cover and site characteristics. The classified image had an overall accuracy of 88%. The summer habitats of particular importance to muskoxen had classification accuracies of 84-89%. Detection of important foraging habitats on Thematic Mapper imagery is attributable to the spectral distinctiveness of wet graminoid communities and the high spectral sensitivity and spatial resolution of the infrared sensors, which allow detection of differences in surface moisture and vegetation physiognomy.
机译：在西北地区北部的班克斯岛上测试了使用Landsat Thematic Mapper数据绘制muskox夏季栖息地地图的可行性。检查了数字图像增强和分类技术，以确定是否可以使用Thematic Mapper影像检测和绘制夏季觅食栖息地。在1988年和1989年夏天在野外验证了卫星数据的解释。对Muskoxen而言，最重要的夏季觅食生境包括湿莎草草甸，类似苔藓苔原和类似类/矮灌木灌木苔原覆盖类型。这些低地生境通常在增强的彩色图像上可以区分，并且很容易与高地地区区分开。用于区分夏季麝香的最合适的颜色组合是分别以红色，绿色和蓝色显示的近红外（波段4），短波红外（波段5）和红色（波段3）光谱带。陆地覆盖类型，包括矮灌木苔原，丘陵苔原和矮灌木/地衣贫瘠，由于植物覆盖和地域特征的差异而引起的光谱变异性，很难区分。分类图像的整体准确度为88％。对麝香木香特别重要的夏季生境具有84-89％的分类精度。在专题制图仪图像上检测到重要的觅食栖息地，归因于湿的类动物群落的光谱独特性以及红外传感器的高光谱灵敏度和空间分辨率，从而可以检测出表面水分和植被地貌的差异。

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