Re: link areas within images

Tony Sanders <>
Message-id: <9306241538.AA18049@austin.BSDI.COM>
To: "Peter Lister, Cranfield Computer Centre" <>
Subject: Re: link areas within images 
In-reply-to: "Peter Lister, Cranfield Computer Centre"'s message of Thu, 24 Jun 93 10:58:28 BST.
Organization: Berkeley Software Design, Inc.
Date: Thu, 24 Jun 1993 10:38:16 -0500
From: Tony Sanders <>
I would like to see this also, exactly as peter described it (using
+ to seperate each x,y pair).  What we really need to define are the
semantics for the browser ISMAP="point" rect poly???  I'm not sure how
to do this in a generic way (do we also need "sound" "video"??).
Maybe instead of telling the browser the type of selection the browser
should tell the server:  http://server/europe?poly+x,y+x,y...

But maybe the ISMAP should still have a hint about what's expected?

> I've just played with Xerox PARCs world map, and been following the
> discussion of hot spots with images, and arbitrary polygon hotspots.
> It occurs to me to ask whether the various mechanisms described can
> handle sending an arbitrary region of the image, e.g. could my broswer
> permit me to draw an outline of the region (e.g. Europe on the world
> map) I want, then send back a URL for map?X1,Y1+X2,Y2.
> This seems to be a reasonable requirement, but I haven't seen it
> explictly describe in the correspondence so far.
> Peter Lister                          
> Computer Centre,
> Cranfield Institute of Technology,        Voice: +44 234 754200 ext 2828
> Cranfield, Bedfordshire MK43 0AL UK         Fax: +44 234 750875