


                                  - 1 -



       COMMAND

       ppppaaaasssstttteeee ---- ppppaaaasssstttteeee iiiimmmmaaaaggggeeee ffffrrrroooommmm iiiimmmmaaaaggggeeee ffffiiiilllleeee iiiinnnnttttoooo iiiimmmmaaaaggggeeee

       USAGE

       ppppaaaasssstttteeee [----vvvvnnnnddddssssaaaammmmccccbbbb] _p_a_t_h_n_a_m_e

       DESCRIPTION

       PPPPaaaasssstttteeee allows you to insert a selected portion of an
       previously ssssaaaavvvveeeed image into a prescribed region of the
       current image.  The replacement rule is determined by the
       option.  Only one option may be given.  The image you are
       currently working on is called the _d_e_s_t_i_n_a_t_i_o_n image.  The
       image in _p_a_t_h_n_a_m_e is called the source.  The source file is
       never changed, only read.

       The paste takes place only within the window limits (see
       llllggggrrrraaaannnnggggeeee).  The window set for the destination image is
       temporarily applied to the source image.  The ppppaaaasssstttteeee
       operation is then performed point by point.  When
       determining a value for point _t,_g in the destination image,
       only point _t,_g in the source image will be examined.

       The default operation is to paste all points in the window
       without regard to the value of either source or destination
       points.

       ----vvvv        Paste only source points which are not void.

       ----nnnn        If point is not void in source, make the
                 destination point void.  Used in the relief
                 process.

       ----dddd        Subtract the source point from the destination
                 point.  If either is void, destination becomes
                 void.

       ----ssss        Add source value to the destination value.  If
                 either is void, destination becomes void.

       ----aaaa        Average the source and destination into the
                 destination.  If either is void, destination
                 becomes void.

       ----mmmm        The greater of source and destination into
                 destination.  If either is void, destination
                 becomes void.













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       ----cccc        Composite, we don't know either, give it a try.

       ----bbbb        Blend the source and destination (sine function).
                 Resulting image will fade from one one to the
                 other.  Not well defined, try it.

       -_p_a_t_h_n_a_m_e The pathname of the file to be pasted in, the
                 _s_o_u_r_c_e image.

       This is a powerful command but requires some planning with
       regard to the configuration of the destination image and
       that of the source image.

       The external file containing the source image for a paste
       operation is will often not be a simple variation of the
       destination image and will not have the same orientation of
       features with respect to a common latitude/longitude
       reference.  Therefore, in order to ensure the desired
       correspondence of the source window and the destination
       windows, either the current image must be shifted or the
       external image must have been shifted by llllttttsssshhhhiiiifffftttt or llllggggsssshhhhiiiifffftttt.
       Provided the orientation of the source image is known, such
       shifts as are required are easily effected on the
       destination image.  Less convenient, yet easily effected,
       are shifts of the externally stored image since this
       requires additional transfers of image data.

       In principal at least, it is possible for the user to
       consider the use of llllttttrrrraaaannnnggggeeee, llllggggrrrraaaannnnggggeeee, iiiinnnnttttsssseeeetttt, eeeexxxxttttsssseeeetttt, and
       ppppaaaasssstttteeee in appropriate combination and in conjunction with
       other _E_c_h_o commands to achieve a virtually limitless variety
       of image modification and synthesis operations.  The level
       of precision with which such operations can be employed is
       perhaps illustrated by the fact that in the limit these
       operations could easily entail the harassment of a solitary
       data point at the exclusion of its 131,071 neighbors.























