I created the attribute table of raster data in ArcMap software. There is a field that I added in the attribute table that I created. I can reclassify the image using the field I added to the image's attribute table in ArcMap software (I do it from Layer Properties —> Symbology –> classified –> Fields –> Value). I opened this image in QGIS software, the attribute table I created was also opened. How can I classify the image in QGIS software according to the additional field I created in the image's attribute table?
QGIS – Classify Image by Field in Attribute Table
image classificationqgisrasterraster-attribute-tablereclassify
Related Solutions
I suspect much of what you are seeing as inconsistent software behaviour will become clearer after reviewing the online help for Raster dataset attribute tables. The help for Build Raster Attribute Table is probably also worth reviewing.
If the solution does not become evident, then I would recommend listing the precise steps you performed on a raster dataset, starting with its precise format, through to when something unexpected was observed. That way we should be able to try and reproduce it and determine whether the software is working as documented.
You could use these two steps:
Use the tool Raster pixels to points
Processing Toolbox > Vector creation > Raster pixels to pointsUse Add X/Y fields to layer on the points layer
Processing Toolbox > Vector table > Add X/Y fields to layer
Best Answer
Use the plugin raster attribute table. It does what you need I think: https://github.com/noaa-ocs-hydrography/qgis-raster-attribute-table-plugin