[ferret_users] How to present data

[Szymon Roziewski <szymon.roziewski@xxxxxxxxx>]

hello ferreters,
I have a problem with presentation data like this:

19.38892740 54.26313387 2.00
19.38902712 54.26330549 2.00
19.38922073 54.26356154 2.00
19.38940360 54.26384345 2.00
19.38959737 54.26415464 2.00
19.38965843 54.26426313 2.00
19.38978024 54.26447867 2.00
19.38989668 54.26469268 2.00
19.39011484 54.26492384 2.00
19.39029296 54.26516713 2.00
19.39039713 54.26542478 2.00
19.39047629 54.26553776 2.00
19.39068417 54.26578383 2.00
19.39079785 54.26601256 2.00

when the first column is longitude, the second one is latitude and the third one is a depth. I would like to do it similar to effect of shade command.
But shade wants data to be on a 2D grid but my data aren't.
How can I nicely present those data?

kind regards,
Szymon Roziewski