Dear all,<br><br>when working with Grass 6.3 as a native Windows version, every raster map calculation I make goes wrong. The whole calculation seems to go well, I don't get any errors, but when I take a look at <a href="http://r.info">r.info</a> for the newly calculated map, the range is always "min = -1.#QNAN0 max = -1.#QNAN0 ", regardless whether the original map is CELL or FCELL. In the original map however, the range is correct. This miscalculation happens with different commands:<br>
<br>r.mapcalc "red_rad=((235+4.5)/(255-1))*(mar2001_B3-1)-4.5"<br>r.resamp.stats ndvi_mar2001_idr out=ndvi_landsat method=average<br>r.mapcalc "red=(mar2001_B3-10)"<br>r.mapcalc "ndvi_mar2001=1.0*(mar2001_B4-red)/(mar2001_B4+red)"<br>
i.tasscap -7 band1=mar2001_B1 band2=mar2001_B2 band3=mar2001_B3 band4=mar2001_B4 band5=mar2001_B5 band7=mar2001_B7 outprefix=tasscap<br><br>Did anyone ever encounter this problem and found a solution to it? I've also tried it in Grass 6.4 on Windows, and the same happens.<br>
<br>Thanks!<br>Annekatrien<br>