xilcoy,

Thank you again for your replies. I'm trying to get just a particuliar point in time done to start as you and Uwe suggest, but it seems no matter what I do with or without using a bounding rect I get the entire plot filled with bars spanning the spectrum of my colormap, instead of just the one horizontal 'bar' filling the coordinates of the bounding rect I am trying to fill in. The value function I am using is from one of the examples here on this forum (I think one of Uwe's) and uses uses a simple rounding for the re-sampling. The data fills the entire plot....seems to ignore the bounding rect I define. Maybe I'm defining it too late in the code after the raster area is already created...I'm not sure...

tim