README for dlgviewer (vhclmaps 0.7)

dlgviewer is a program for viewing DLG 1:2M data (and DLG 100K data)
from the USGS.  See the top-level vhclmaps README for details on how to
acquire this data, or call 1-800-USA-MAPS to buy the CD-ROM.

Arguments specific to dlgviewer are:
	-mapdb pathname (or -database pathname)
		pathname of DLG 1:2M standard format database

	-maplib libname (or -library libname)
		section directory name (i.e. sect01)

	-mapcov covname (or -coverage covname)
		two letter coverage type (i.e. wb for water bodies)

	-mapfcl fcname (or -fclass fcname)
		feature class (i.e. area, line, text)

The default for dlgviewer is:

	dlgviewer -mapdb /cdrom/dlg/std -maplib sect01 -mapcov wb -mapfcl area

Also dlgviewer has its own document format, which is controlled by the
File menu of a running dlgviewer.  To launch on a dlgviewer document,
simply supply it as the only argument to dlgviewer, i.e.:

        dlgviewer document.dlgs

"dlgviewer -help" lists other parameters.  More instructions on
running dlgviewer at http://www.vectaport.com/vhclmaps/.