3.4.6.5. Edit raster

Edit raster

This tab allows for the direct editing of pixel values in a raster. Only pixels beneath ROI polygons or vector polygons are edited.

Warning

The input raster is directly edited; it is recommended to create a backup copy of the input raster before using this tool in order to prevent data loss.

This tool can rapidly edit large rasters, especially when editing polygons are small, because pixel values are edited directly.

Tip

Information about APIs of this tool in Remotior Sensus at this link .

3.4.6.5.1. Edit raster

Tool symbol and name	Description
Select the classification	select a raster (already loaded in QGIS)
	refresh layer list

3.4.6.5.2. Edit raster values

Tool symbol and name	Description
Edit values using ROI polygons	if checked, raster is edited using temporary ROI polygons in the map
Edit values using a vector	if checked, raster is edited using all the polygons of selected vector
	refresh layer list

3.4.6.5.3. Edit options

Tool symbol and name	Description
Use the value field of the vector	if checked, raster is edited using the selected vector in Edit values using a vector) and the polygon values of selected vector field
Use constant value	if checked, raster is edited using the selected constant value
Use expression	if checked, raster is edited according to the entered expression; the expression must contain one or more where; accepted variables are: "raster" representing the input raster value and "vector" representing the vector value if selected; the following example expression where("raster" == 1, 2, "raster") is already entered, which sets 2 where "raster" equals 1, and leaves unchanged the values where "raster" is not equal to 1; this expression only edit pixels that are beneath the input vector polygons

3.4.6.5.4. Edit raster values

Tool symbol and name	Description
	undo last edit of raster
Script	add this function to the Script
RUN	run this function