[GRASSLIST:1915] Fw: Color composition of Landsat image using GRASS

[Wisa Wisesjindawat]

> Hi all,
> 
> We have some questions to ask all of you:
> 
> 1. My friend did color composition of Landsat TM-5 image using GRASS. She
> used the bands 4,3 and 2 (red,green,blue) as input bands. At the result,
> she has found that the pixels value in the output image is more than
> 255, i.e in the range of 1 to 512. It seems strange, because the pixels
> value should not more than 255. Do you know why?
> 
> 2. She has find out also that in band 5,6 and 7 of Landsat TM, the
> pixels value are more than 255? Could you explain us?
> 
> Best regards
> 
> Vivarad
>