How to warp or georeference a grid or image

I have an unreferenced grid/image that I need to georeference.

To create the warp file:

Display your image or grid to a new map - Grid and Image > Display > Single Grid (or Image).
With the map selected, Coordinates menu > Georeferencing > Define a Warp.
If you have known coordinates for 4 well-distributed points, use the 4-Point Quadrilateral Warp.
If you only have a couple of points, use 2-Point or 3-Point.
Select a Definition Mode > OK.
Define the output coordinate projection - click Yes on the Map Projection dialog > define the projection > OK.
Proceed in a clockwise or counter-clockwise fashion for the control points.
This will produce a *.wrp file which is an ASCII file that can be opened in a text editor.

To warp the grid:

Coordinates menu > Georeferencing > Warp a Grid.
Select the Grid file to warp.
Browse to the Warp definition file you created.
Enter a name for the New warped grid file.
To produce a new warped grid file make sure to choose the appropriate file type to save as. If you are warping a GRD, use Geosoft default *.grd. If you are warping an Image use Geosoft Color *.grd or Geotiff colour *.tif. Warping an image and not saving the resulting file as a Geosoft Color *.grd or Geotiff colour *.tif will distort the colour range of the image
Once complete, display your new grid/image to a new map or to an existing projected map.

Alternatively, instead of creating a new output file, you can simply attach the warp to your image file.
To attach a warp to a grid:

Coordinates menu > Georeferencing > Attach Warp to Grid.
Browse to and select the Grid file to attach the warp to.
You may have to change the Files of type to be able to select your image file.
Browse to and select the Warp definition file.
Click OK.
Expand the Grids list in the Project explorer > right-click the file that you attached the warp to > Remove.
This step is suggested so the image is opened in the project with the correct georeferencing information.
Import the grid or image to the project from Grid and Image menu > Display.

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