[no subject]

The hassle is that not all people have all the viewers for all types of
files.

In comes Adobe and the PDF format.  Adobe is into publishing and created PDF
in that image.  It is based on postscript with the ability to mix various
types of graphics inside a file.  Depending on the quality of the software
you use, it can include some items as text, some as vectors (drawn lines and
areas), and some as bit maps.  For bitmaps, it can change them to various
resolutions and compression types.  Your software may allow the resolution
and compression to be adjusted.
If you go to www.threeriversparkdistrict.org/parks/, they have a link to
their system map
(http://www.threeriversparkdistrict.org/parks/Maps/Park_District_Map_05.pdf).
The file is about 1.7 meg but has an amazing amount of detail in color.  The
paper map is 18x24 inches.  It contains a lot more than you are likely to
ever include in a schematic.

--
Bill Fuhrmann