-In one map window, a raster image can be displayed together with point,segment or polygon maps. It is not possible in ILWIS to display two raster maps in one map window.
-An image is stored in row and column geometry in raster format. When you obtain an image there is no relationship between the rows/columns and real world coordinates (UTM,geographic coordinates,or any other reference map projection)yet.In a process called geo-referencing,the relationship between row and column number and real world coordinates can be established(see section 6.4).