Imagemaps

[turnbull@example.com (Stephen J. Turnbull)]

To Jim S., and anybody else who's mucking about with imagemaps.

I have successfully made imagemaps work (locally, haven't tried from a
foreign machine yet) with both the NCSA (1.3; 1.5.2 is a-building as I
type) and Apache (1.1.1) httpds.  To test the NCSA imagemap, go to

		  http://turnbull.sk.tsukuba.ac.jp/

and the imagemap is the "skinny boy" GIF at the bottom of the first
screen or so.  Click on the left side, and you get a little screaming
alien (from Adams's Hitchhiker books' covers).  Click on the right
side and you end up at "InfoShako", my institute's home page.  Not
very useful, but who cares?  Here's the relevant parts of various
files.  The *Root variables are from httpd.conf.  The variables are of
course substituted in place; the imagemap routine doesn't know
anything about the variables $ServerRoot or $DocumentRoot.  The 
<! ... > tag is a comment; compare with apache-map.html below.

$DocumentRoot/index.html (ll. 33-36):
<! A HREF="/maps/index-map.map">
<A HREF="/cgi-bin/imagemap/maps/index-map.map">
<IMG ISMAP ALT="" SRC="/gadgets/skinny.gif">
</A>

$DocumentRoot/maps/index-map.map (all):
# This map file was created with mapedit 2.25.  The HREFs were *not*
# created using mapedit, as mapedit munges Japanese.
#
# The location below $DocumentRoot is a coincidence as far as NCSA is
# concerned; it makes life easier for Apache.
default /gadgets/gaijin.gif
#To InfoShako
rect http://www.sk.tsukuba.ac.jp/ 56,30 163,176

/usr/local/etc/httpd/conf/imagemap.conf (all):
# This file is used only by the imagemap CGI script (and possibly
# recent NCSA HTTPds' internal imagemap function; the Apache HTTPd's
# internal imagemap facility apparently ignores it, and certainly
# doesn't need it).  The $ServerRoot is hard-coded in the NCSA
# imagemap binary to /usr/local/etc/httpd.
#
# Note that the leading '/' of PATH_INFO is stripped by the imagemap
# CGI script, so the map path must be relative.  On the other hand,
# CGI scripts live in Unix space (HTTPds normally do *not* chroot), so 
# the reference must be absolute.
maps/index-map.map: /WWW/htdocs/maps/index-map.map

To try the Apache httpd, use the URL

	   http://turnbull.sk.tsukuba.ac.jp/apache-map.html

which is just a copy of index.html with the imagemap as follows:

$DocumentRoot/apache-map.html (ll. 33-36):
<A HREF="/maps/index-map.map">
<! A HREF="/cgi-bin/imagemap/maps/index-map.map">
<IMG ISMAP ALT="" SRC="/gadgets/skinny.gif">
</A>

It uses the *identical* $DocumentRoot/maps/index-map.map, and ignores
the /usr/local/etc/httpd/imagemap.conf file.

Tokoro de, there is also a client-side imagemap in 

	   http://turnbull.sk.tsukuba.ac.jp/index-map.html

(with munged Japanese and different functionality for the map; I
didn't know how to use mapedit when it was created---jump to the end
of the document source to see the client side map).

If this still doesn't get you going, Jim, why don't you post the
relevant files?

Steve

-- 
                           Stephen John Turnbull
University of Tsukuba                                        Yaseppochi-Gumi
Institute of Policy and Planning Sciences  http://turnbull.sk.tsukuba.ac.jp/
Tennodai 1-1-1, Tsukuba, 305 JAPAN                 turnbull@example.com
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