Background Image Types

Any TIFF (*.tif,*.tiff), JPEG (*.jpg, *.jpeg) or BITMAP (*.bmp) raster images are supported. The images must have geo-referenced data to be positioned correctly under all observed data on the map screen.

Note: The geo-referenced data defines the relationship between pixels coordinates of the image and real datum / grid / ground / local coordinates.

GeoTIFF images already contain geo-referenced data, while the others use a separate file which defines the geographic location of the image. This file is called a World File. MAGNET Field generates the World File for selected background image without geo-referenced data after performing the Background Image Transformation.

A World File contains information about the size of the corresponding image and the coordinates of the geo-reference point (the upper left corner of the image) in the coordinate system of the job. The World File must have the same file name extension associated with the image format (*.tfw, *.jgw or *.bpw) and should be located in the same directory as the image file.