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:
r.sentinel.import input=Downloads/S2B_MSIL1C_20171212T134159_N0206_R124_T21KZP_20171212T201017.SAFE/GRANULE/L1C_T21KZP_A004011_20171212T134158/IMG_DATA/
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 values.
r.univar map=T21KZP_20171212T134159_B02@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
Metadata:
STATISTICS_MAXIMUM=1576
STATISTICS_MEAN=916.7992
STATISTICS_MINIMUM=602
STATISTICS_STDDEV=123.50943477872
Image Structure Metadata:
COMPRESSION=JPEG2000
NBITS=15
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 
Cheers,
Vero
I tested also with 74 release branch… same result
···
2018-02-05 13:05 GMT+01:00 Veronica Andreo <veroandreo@gmail.com>:
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:
r.sentinel.import input=Downloads/S2B_MSIL1C_20171212T134159_N0206_R124_T21KZP_20171212T201017.SAFE/GRANULE/L1C_T21KZP_A004011_20171212T134158/IMG_DATA/
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 values.
r.univar map=T21KZP_20171212T134159_B02@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
Metadata:
STATISTICS_MAXIMUM=1576
STATISTICS_MEAN=916.7992
STATISTICS_MINIMUM=602
STATISTICS_STDDEV=123.50943477872
Image Structure Metadata:
COMPRESSION=JPEG2000
NBITS=15
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
Cheers,
Vero
On Mon, Feb 5, 2018 at 1:14 PM, Veronica Andreo <veroandreo@gmail.com> wrote:
I tested also with 74 release branch… same result
2018-02-05 13:05 GMT+01:00 Veronica Andreo <veroandreo@gmail.com>:
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:
r.sentinel.import input=Downloads/S2B_MSIL1C_20171212T134159_N0206_R124_T21KZP_20171212T201017.SAFE/GRANULE/L1C_T21KZP_A004011_20171212T134158/IMG_DATA/
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 values.
r.univar map=T21KZP_20171212T134159_B02@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
Metadata:
STATISTICS_MAXIMUM=1576
STATISTICS_MEAN=916.7992
STATISTICS_MINIMUM=602
STATISTICS_STDDEV=123.50943477872
Image Structure Metadata:
COMPRESSION=JPEG2000
NBITS=15
Can you try again with gdalinfo -mm? This forces computation of the actual min/max values, which can differ from what is stored in the metadata (an approximation).
There can also be something wrong with i.color.enhance
Markus M
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
Cheers,
Vero
grass-dev mailing list
grass-dev@lists.osgeo.org
https://lists.osgeo.org/mailman/listinfo/grass-dev