...ImageJforXTF extends the open source ImageJ software with functionalities that allow to open and manage XTF files. This kind of files is used to record sonar and bathymetric data. An user can choose to open any file with extension ".xtf" so that the program parses it and shows the resulting image. Then the user can resize the image, apply graphic filters, perform measurements and georeference the recorded data using GoogleMap and GoogleEarth, in addition to using the basic functionality offered by ImageJ.