This is amazing!
High resolution sampling by laser desorption, then sampling by the mass spec can build up a high resolution data image.
Here's a blog post about applications for biological tissues:
http://pipeline.corante.com/archives/2010/04/27/masses_of_data_in_every_sample.php#zemail
For close up geological samples, this technique has some pretty amazing possibilities.
Attempt at representing MS data (well, normalized ion abundance) from a table into a graphic overlaid on Titan's surface http://www.unmannedspaceflight.com/index.php?s=&showtopic=6579&view=findpost&p=159311.
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