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首页> 外文期刊>Lakes & Reservoirs >Benefits of pan-sharpened Landsat imagery for mapping small waterbodies in the Powder River Basin, Wyoming, USA
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Benefits of pan-sharpened Landsat imagery for mapping small waterbodies in the Powder River Basin, Wyoming, USA

机译：全幅锐化的Landsat影像对绘制美国怀俄明州Powder River盆地小型水体的地图的好处

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Pan-sharpened Landsat imagery was used to map waterbodies of a wide variety of sizes in the Powder River Basin (PRB) in northcentral Wyoming, USA. Coal bed natural gas extraction activities have been intensive in the PRB over the past decade, with abundant co-produced water being discharged into retention ponds and small ephemeral channels. Although land management agencies are tasked with monitoring these waterbodies, traditional field survey methods might not be feasible during rapid development. Remote-sensing applications could be used in such cases. Although Landsat and similar medium-resolution datasets do not have detailed spatial information at fine resolutions required to map small waterbodies, they do contain rich spectral information. Panchromatic data collected by satellites have an appropriate spatial resolution, but lack detailed spectral information. Thus, image fusion techniques were used to create a pan-sharpened image, by merging multispectral (30-m resolution) and panchromatic (15-m) bands from Landsat 7 imagery. Both the original and the pan-sharpened images were used to map waterbodies and estimate their area, being compared to photo-interpretation results. The accuracy of mapping waterbodies with pan-sharpened imagery was significantly higher than the original Landsat data for waterbodies ranging in size from 901 to 8100 m~2. Large reservoirs (> 8100 m~2) were very accurately mapped, both images producing identical results (96%). Neither image was able to suitably detect very small waterbodies ( < 900 m~2). Detailed analysis within 901-3600 m~2 size category revealed that the benefits of pan-sharpened imagery were most pronounced (25% higher accuracy) for mapping waterbodies ranging in size from 1801 to 2700 m~2.
机译：在美国怀俄明州中北部的粉河盆地（PRB）中，使用了锐化的Landsat影像来绘制各种尺寸的水体。在过去的十年中，PRB大力开展了煤层气的开采活动，大量的联产水被排入了蓄水池和小的临时通道。尽管土地管理机构的任务是监测这些水体，但在快速发展期间，传统的田间调查方法可能不可行。在这种情况下可以使用遥感应用程序。尽管Landsat和类似的中分辨率数据集不具有绘制小型水体所需的高分辨率的详细空间信息，但它们确实包含丰富的光谱信息。卫星收集的全色数据具有适当的空间分辨率，但缺乏详细的光谱信息。因此，通过融合Landsat 7影像中的多光谱（30 m分辨率）和全色（15 m）波段，使用了图像融合技术来创建全景图像。原始图像和泛锐图像均用于绘制水体图并估计其面积，并与照片解释结果进行比较。泛锐化图像对水体进行地图绘制的准确性明显高于原始Landsat数据，其大小范围为901至8100 m〜2。大型油藏（> 8100 m〜2）被非常精确地绘制，两个图像产生相同的结果（96％）。这两个图像都无法适当地检测非常小的水体（<900 m〜2）。在901-3600 m〜2尺寸类别中进行的详细分析显示，对于绘制范围从1801到2700 m〜2的水体，全景图像的优势最为明显（精度提高25％）。

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