edit_raster_tab.rst

Edit raster

• Edit raster
• Edit raster values
• Edit options
• Edit raster values

:guilabel:`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 .

Edit raster

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

Edit raster values

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

Edit options

Tool symbol and name	Description
:guilabel:`Use the value field of the vector`	if checked, raster is edited using the selected vector in :guilabel:`Edit values using a vector`) and the polygon values of selected vector field
:guilabel:`Use constant value`	if checked, raster is edited using the selected constant value
:guilabel:`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

Edit raster values

Tool symbol and name	Description
	undo last edit of raster
:guilabel:`Script`	add this function to the :ref:`script_tab`
:guilabel:`RUN`	run this function