Data type conversion
From AWF-Wiki
We may change the data type (or radiometric resolution) of a raster layer.
- Click the Add raster layer
and select a single band file C:/OSGeo4W64/geodata/raster/s2/Subset_S2A_MSIL2A_20170619T_B03.tif. This is the spectral green band with the data type UInt16 - Sixteen bit unsigned integer Unsigned Integer with the value range 0 to 65535 (Check the Raster metadata). We would like to convert the raster to data type Byte - eight bit unsigned integer, value range 0 to 255.
- Click Open, and the raster layer appears on the QGIS canvas.
- In the processing toolbar, type Rescale into the search field to find the Orfeo Toolbox --> Image Manipulation --> Rescale Image) tool. Open it with a double click. Specify a new output file name as shown in the screenshot.
The output Image raster is now recoded to correct eight bit data range but the data type is now Float32 - Thirty two bit floating point.
- In the processing toolbar, type Convert data into the search field to find the SAGA --> Raster tools --> Convert data storage) tool. Open it with a double click.
Specify
- Data storage type: [1] unsigned 1 byte integer
- Converted grid: a new output file name. Click Run.
