View source for Talk:Data type conversion

This is not a smart solution!:

We may change the data type (or radiometric resolution) of a raster layer. 
# Click the {{button|text=Add raster layer}} [[Image:QGIS_2.0_addrast.png|20px]] and select a single band file  ''/geodata/raster/s2/Subset_S2A_MSIL2A_20170619T_B03.tif''. This is a spectral green band with the data type '''UInt16 - Sixteen bit 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 {{button|text=Open}}.
# In processing toolbar, type {{typed|text=Rescale}} into the search field to find the {{button|text=Orfeo Toolbox --> Image Manipulation --> Rescale Image)}} tool. Open it with a double click. Specify a new output file name as shown in the screenshot.

[[File:Qgis_rescale.png|400px]]

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'''. Note, the Output pixel type option {{typed|text=uint8}} currently does not work!
# In the processing toolbar, type {{typed|text=Convert data}} into the search field to find the {{button|text=SAGA --> Raster tools --> Convert data storage)}} tool. Open  with a double click.
Specify 
* Data storage type: {{button|text=[1] unsigned 1 byte integer}}
* Converted grid: a new output file name. Click {{button|text=Run}}.

[[File:Qgis_convert_data_storage.png|400px]]