我正在使用geotrellis从位于S3上的Landsat8加载geotiff栅格。但是,它们是按频带存储的。我可以使用S3GeoTiff类来加载单个波段,例如:
val options = S3GeoTiffRDD.Options(getS3Client = () => S3Client.ANONYMOUS)
val rddBlue = S3GeoTiffRDD.spatial("landsat-pds", "L8/139/045/LC81390452014295LGN00/LC81390452014295LGN00_B2.TIF", options)
val rddGreen = S3GeoTiffRDD.spatial("landsat-pds", "L8/139/045/LC81390452014295LGN00/LC81390452014295LGN00_B3.TIF", options)
val rddRed = S3GeoTiffRDD.spatial("landsat-pds", "L8/139/045/LC81390452014295LGN00/LC81390452014295LGN00_B4.TIF", options)但是我如何结合它们来生成RGB栅格呢?
val rddRGB = ??? // something like combineRDDs(rddRed, rddGreen, rddBlue)https://stackoverflow.com/questions/44421705
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