[GRASS-dev] r.in.gdal changes range of values for sentinel bands (?)

Veronica Andreo veroandreo at gmail.com
Mon Feb 5 04:05:28 PST 2018

Hi devs

I'm testing Martin's new add-on, r.sentinel.import. I created an UTM21S
location for my data and imported them with:


The problem arose when I tried to use i.color.enhance to display an RGB: I
got blank screens, so I thought there must be something with the range of

r.univar map=T21KZP_20171212T134159_B02 at PERMANENT

total null and non-null cells: 120560400
total null cells: 0
Of the non-null cells:
n: 120560400
minimum: 15
maximum: 17547
range: 17532
mean: 913.778
mean of absolute values: 913.778
standard deviation: 134.322
variance: 18042.4
variation coefficient: 14.6996 %
sum: 110165471238

that already seemed odd...
I checked the original band2 jp2 file... Values are different...

gdalinfo T21KZP_20171212T134159_B02.jp2
Driver: JP2OpenJPEG/JPEG-2000 driver based on OpenJPEG library
Files: T21KZP_20171212T134159_B02.jp2
Band 1 Block=1024x1024 Type=UInt16, ColorInterp=Gray
  Min=602.000 Max=1576.000
  Minimum=602.000, Maximum=1576.000, Mean=916.799, StdDev=123.509
  Overviews: 5490x5490, 2745x2745, 1372x1372, 686x686
  Overviews: arbitrary
  Image Structure Metadata:

Just to check, I imported with r.in.gdal and I'm getting exactly the same
as with r.sentinel.import.

What am I doing wrong here? Why would r.in.gdal change values like that?
What else needs to be set? I don't remember to have this problem before and
it happens in all bands as far as I've checked.

Ah, I'm using trunk r72203

Thanks in advance for any help :)

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