Update Since 0.2.0, the qabmasker has been renamed as landsatmasker and the function getmask has been renamed as getmultimask for better identification. Please update your script accordingly.

Update Since 0.3.0, most class and function names have been updated according to the pep8.

The Quality Assessment (QA) band is a standard product included in each Landsat 8 image downloaded from USGS, which contains the quality information of each pixel such as cloud, snow/ice, water body etc. The detailed information of this band can be found at Landsat 8 Quality Assessment Band.

ArcMap Raster Edit Suite (ARES) is an addin for ArcMap 10.x that enables value editing of single pixels on raster layer. This is an open-source software and the project is hosted at GitHub and published at SourceForge as well.