SUBROUTINE RASGEN(IRAS)
	INTEGER*2  IRAS
C
C	This subroutine is a general purpose rasterizing program.
C	Vector data is read in, and bands of raster data are generated.
C	One band is generated with each call, starting with band 0.
C	IRAS is the band to be generated.  Returned in IRAS is maximum
C	band number needed to complete the plot.  This is returned each call.
C
C	All the vector files are read in (opened and closed) for each
C	band generated.  This is not necessarily the quickest method, but
C	it does work.
C
C	Each vector file read in can be scaled and offsetted independantly,
C	and there is a global scale and offset.  The scale and offset
C	factors, file name, loons, etc are all contained in RASTER.COM.
C
C	This subroutine was adapted from ICOPY, created by K. Trischan of MSU.
C
C
C	modification history:
C
C	3 april 83	hg	initial edit
C
C
C===========================================================================
C