Hi all, I have a very simple question about an ENVI procedure. Does anyone know how to avoid the interpolation where the data are missing with the ENVI_GRID_DOIT procedure ? ENVI_DOIT, 'ENVI_GRID_DOIT', X_PTS = XYZ[0,*], Y_PTS=XYZ[1,*], Z_PTS=Result[0,*], OUT_DT=5, PIXEL_SIZE=pixel_size , $ OUT_NAME='Skewness', O_PROJ=defProj, INTERP=0, R_FID=r_fid Thanks in advance. Antoine C.