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I have several bands of raster from the Landsat8 satellite, and I need to convert them into a floating-point representation. In ArcMap this is done through:

Spatial Analyst Toolbox -> Math -> Trigonometric -> Float.

How do I accomplish this in QGIS?

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I was able to achieve this by utilizing the GdalTools plugin. GDAL -> GDAL Conversion -> Translate (convert format). I chose the output raster to have the data type float32, and received a GeoTIFF with proper float data type.

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