David Crossley (
Tue, 10 May 94 07:59:04 EST

We use NCSA httpd and Mosaic to present a GIF image as a clickable map to
the client. The IMAGEMAP (ISMAP) facility allows the pixel coordinates of the
mouseclick to be interpreted. Some document is served or some parameter is
passed to a server script depending on the location of the mouse click in
the image.

This facility is extremely powerful and allows very creative ways to serve
information. However we are finding that for many applications we need more
than a simple point location on the image. We need the user to be able to
define a rectangle on the map image (click, hold, drag, release).

As I understand it, this operation is not currently supported by IMAGEMAP.
Are there any plans to introduce this feature or can can anyone see other
ways around this lack?

David Crossley (
Environmental Resources Information Network - ERIN