[gdal-dev] Can't read NITF image

[Nikos Alexandris]

Nikos Alexandris a écrit :

> > I am trying to access an  .ntf  image.

> > gdalinfo /Some_Path/03APR13WV010500013APR03073140-
> > P1BS-500060446050_03_P002.ntf -noct -nomd -nogcp -sd 1

> > ERROR 4:
> > `/vsisubfile/3884_478612158,/Some_Path/03APR13WV010500013APR03073140-
> > P1BS-500060446050_03_P002.ntf' not recognised as a supported file format.

[..]

> > Is this a *generic* problem or else, if I compile  --with-jasper  support
> > will allow for reading this image?


Even Rouault wrote:

> This is a problem you'll run into each time you will open a NITF image whose
> imagery is compressed as a JPEG2000 codestream. Compiling --with-jasper
> might help, but if your image is big, it might not work since jasper reads
> the whole image into memory. If you run into this memory problem, you might
> use OpenJPEG 2 instead (provided you use GDAL 1.10),

O-K, looks much better now:

gdalinfo --version && gdalinfo --formats | grep JP
                                     
GDAL 1.10.0, released 2013/04/24                                                                         
  JPEG (rwv): JPEG JFIF
  JP2OpenJPEG (rwv): JPEG-2000 driver based on OpenJPEG library
  JPEG2000 (rwv): JPEG-2000 part 1 (ISO/IEC 15444-1)


e.g.

gdalinfo -nogcp -nomd -noct 03APR13WV010500013APR03073140-
P1BS-500060446050_03_P002.ntf

Driver: NITF/National Imagery Transmission Format
Files: 03APR13WV010500013APR03073140-P1BS-500060446050_03_P002.ntf
Size is 35840, 27648
Coordinate System is `'
Subdatasets:
  SUBDATASET_1_NAME=NITF_IM:0:03APR13WV010500013APR03073140-
P1BS-500060446050_03_P002.ntf
  SUBDATASET_1_DESC=Image 1 of 03APR13WV010500013APR03073140-
P1BS-500060446050_03_P002.ntf

[..]

Corner Coordinates:

[..]

Band 1 Block=1024x1024 Type=UInt16, ColorInterp=Gray
  Overviews: 17920x13824, 8960x6912, 4480x3456, 2240x1728, 1120x864
  Overviews: arbitrary
Warning 1: Unable to save auxilary information in 
/vsisubfile/3884_478612158,03APR13WV010500013APR03073140-
P1BS-500060446050_03_P002.ntf.aux.xml.

[more Warnings]


Question:  how can I tell which driver is used?  Just empirically, e.g. Jasper 
precedes OpenJPEG2?  Oh well, I'll have to search in the manuals I guess...



> or else one of the proprietary implementation.

I've been through posts in the list and reading details in 

<http://trac.osgeo.org/gdal/wiki/ECW>, 
<http://trac.osgeo.org/gdal/wiki/JasPer>, 
<http://trac.osgeo.org/gdal/wiki/JP2KAK>, 
<http://trac.osgeo.org/gdal/wiki/MrSID>

So, what's the take-home message for an average QGIS user for example?  I am 
not critisising -- just being curious, honestly.


Milles Mercis Even,
Nikos