Background Image

GiD allows an image to be used as a background for visualization purposes (the supported image formats are gif, png, jpeg, tiff, bmp, tga and ppm). There are the following options:

If a file with the same name as the image, and .tfw extension exists, it is used to georeference the image

the content of this ASCII file must be:

Mxx

Myx

Mxy

Myy

Dx

Dy

The image coordinates are calculated as:

x'=Mxx*x+Mxy*y+Dx

y'=Myx*y+Myy*y+Dy