SOS在ARCMAP中怎样给栅格图象配准？SOS

有哪位DGDJ知道在ARCMAP中怎样给扫描的栅格图象配准，并给它配置坐标吗？

<P>给栅格文件加上World file，在ArcDoc里面键入World file可以查到相关内容</P>

"给栅格文件加上World file"是什么意思啊？

<P>对于A.TIF文件，增加A.TFW（TIF对应的World file）</P><P>对于A.JPG文件，增加A.JGW（JPG对应的World file）</P><P>...........</P><P>World file文件格式：</P><P> 3.20612628172694  - A
  3.57624161821589  - D
  3.58580315303679  - B
  -3.26818030576890  - E
  412859.44583667407278  - C
  4315361.80367969442159  - F</P><P>x1 = Ax + By + C
y1 = Dx + Ey + F </P><P>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
E = negative of y-scale; dimension of a pixel in map units in y direction
  (The y-scale 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 fromthe origin downward, while y-coordinate
  values in the map increase from the origin upward.)
C, F = translation terms; x,y map coordinates of the center of the upper-left pixel</P>

<P>晕</P>