I'd have a peek at www.lebans.com
for information on how to do some of this yourself. I'm not sure what you mean about placing 'objects' on a graphic but Stephen Lebans has done a good deal of work with graphics classes including zooming and a simple graphic editor. I find I bump into memory/size issues when I work with large graphics so I'm not sure about hi res plotter output unless you are willing to go vector graphics and that doesn't really integrate with conventional Access controls.
A useful resource which was my graphics bible for several years was a Wrox book called Instant Visual Basic Animation by Michel Leroux (ISBN 1-874416-78-8 published in '96). It was written to go with VB4 using the Win 32 API so all the information is still valid and the classes pretty much drop into Access.
There was a demo about placing and storing grid references on a graphic available for download at the Dec 4, 2001 meeting of www.vbad.edmonton.ab.ca/
. Click the link to previous meeting agendas and scroll to the Dec 4 2001 meeting. It wasn't very sophisticated but seemed to have met the requirement.
Edmonton AB Canada