| A world file will look something like this: 20.17541308822119 0.00000000000000 0.00000000000000 -20.17541308822119 424178.11472601280548 4313415.90726399607956 ArcView performs the transformation. The image-to-world transformation is a six-parameter affine transformation in the form of: x1 = Ax + By + C y1 = Dx + Ey + F where x1 = calculated x-coordinate of the pixel on the map y1 = calculated y-coordinate of the pixel on the map x = column number of a pixel in the image y = row number of a pixel in the image A = x-scale; dimension of a pixel in map units in x direction B, D = rotation terms C, F = translation terms; x,y map coordinates of the center of the upper-left pixel E = negative of y-scale; dimension of a pixel in map units in y direction Note The y-scale (E) is negative because the origins of an image and a geographic coordinate system are different. The origin of an image is located in the upper-left corner, whereas the origin of the map coordinate system is located in the lower-left corner. Row values in the image increase from the origin downward, while y-coordinate values in the map increase from the origin upward. The parameters are stored in the world file in this order: 20.17541308822119 - A 0.00000000000000 - D 0.00000000000000 - B -20.17541308822119 - E 424178.11472601280548 - C 4313415.90726399607956 - F ArcView does not rotate, or warp, images. (from Arcview 3.0a help) GLORIA | SLAR | LINEAMENTS | NEOTECTONIC SETTING | SEDIMENT MAP | FE-MN NODULES SEDIMENTARY PROCESSES | GIS DATA | SAND AND GRAVEL | CONTACTS | HOME SLOPE FAILURE | ARCEXPLORER | ARCVIEW | PHOTOS | CONTENTS |