Viewing attributes and pointing raster position! (fwd)

Hi,

I have to do a lot of brute calculations on the raster data (array
calculations) which are not yet available on Grass even not with mapcalc!
In alot of these programs i have to give as input the row, the column and
the attribute value of one pixel in the whole raster!

My question is now!

Is there a program or a script that allows you to point with the mouse to
a specific pixel and gives you just the x,y,z value! And even more cute
should be to see displayed. Column,Row, x,y, and Z-value! I know its
exists in Idrisi and its very hansome for people loking up tha attribute
value! I can not imgeine it does not exist but browsing in the ref manual
did not help me until now!

      Thanks for any help!

      Bart

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  Ir. Bart Cosyn
  EC- Environment project
  CRS4
  Environmental modelling group
  Via Nazario Sauro, 10
  Tel +/39/70/2796278
  Fax +/39/70/2796216
  E-mail: bcosyn@crs4.it
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