Hi there,

Basically I have an irregular grid of three dimensional data, where x,y specify a point, and Z specifies elevation (some value in specific range), and I need to color it. Since the x,y coordinates in value() do not match mine, I have to interpolate them. What's the suggested way to plot the irregular data on the QwtPlotSpectrogram? My problem is that I have only few points, and the contours on the spectrogram looks too sharp. Is there any way to enable the interpolation for contours (i.e. have the Qwt draw an arc instead of a line between two points)?