Data type conversion
From AWF-Wiki
(Difference between revisions)
| Line 1: | Line 1: | ||
We may change the data type (and radiometric resolution) of a raster layer. | We may change the data type (and radiometric resolution) of a raster layer. | ||
| − | # Click the {{button|text=Add raster layer}} [[Image:QGIS_2.0_addrast.png|20px]] and select a multiband file e.g. ''/ | + | # Click the {{button|text=Add raster layer}} [[Image:QGIS_2.0_addrast.png|20px]] and select a multiband file e.g. ''/geodata_w03/subset_prezelle_2013_NDVI_NDWI2_BI2.tif''. This is multiband file with data type '''float'''. Convert to data type '''uint8 (8bit unsigned integer)''', value range 0 to 255. |
# Click {{button|text=Open}}. | # Click {{button|text=Open}}. | ||
# In processing toolbar, type {{typed|text=dynamic}} into the search field to find the {{button|text=Orfeo Toolbox --> Image Manipulation --> DynamicConvert}} tool. | # In processing toolbar, type {{typed|text=dynamic}} into the search field to find the {{button|text=Orfeo Toolbox --> Image Manipulation --> DynamicConvert}} tool. | ||
Revision as of 22:04, 5 June 2020
We may change the data type (and radiometric resolution) of a raster layer.
- Click the Add raster layer
and select a multiband file e.g. /geodata_w03/subset_prezelle_2013_NDVI_NDWI2_BI2.tif. This is multiband file with data type float. Convert to data type uint8 (8bit unsigned integer), value range 0 to 255.
- Click Open.
- In processing toolbar, type dynamic into the search field to find the Orfeo Toolbox --> Image Manipulation --> DynamicConvert tool.
- Open with a double click. Specify the input and a new output file name as shown in the screenshot.
- Set High cut quantil and Low cut quantile to 0
- Click Advanced parameters and define Output pixel type uint8.
- Click Run.
The output Image raster is now recoded and saved to unsigned eight bit.
