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lego tiled image (how to make?)

Greetings all,
I have an satellite data image and I would like to plot it
as a color image composed of small uniform shaded rectangles.
i.e. sort of like IDL> tv,rebin(image,/sample)

This data does need the axis that a surface (or plot) command will give.
So the rebin will not work in general, (or I supoose I could calculate
the  size of the output image, then create the axis appropriate for that)
Also, I will want to plot this as a polar plot in the future, and the rebin
function will nto work for that.

What I (currently) do to plot this data is (surface; rotated to bird's eye

shade_surf, merged,lonbins,latbins,shade = bytscl(merged,/nan),$
     ax=90,az=0,ztickname = strarr(10)+' ',zticklen = 0.0001,/noerase

What I really want is  to create a surface like
and do the above shadesurf command.

What is the best way to create such a figure?
Should I write the code to draw and shade each polygon for each sample
(ugh slow!), or is there already a way to do such a thing?

stockwell at co-ra.com