[Qgis-developer] Re: [gdal-dev] Problems with gdal and hdf files
Agustin Lobo
alobolistas at gmail.com
Wed May 2 05:43:12 PDT 2012
You are right. I was confusing bands and subdatasets.
The following does not work:
$ gdal_translate -b 4 lndsr.L5169054_05420101216.hdf test.tif
Input file contains subdatasets. Please, select one of them for reading.
The following works:
$ gdal_translate -sds lndsr.L5169054_05420101216.hdf test.tif
which results in test.tif1 to test.tif9 (probably should be test1.tif
to test9.tif)
but there is no way to actually select 1 or more specific subdatasets
The most important
QGIS complains:
Cannot get GDAL raster band:
R (raster) complains
> r <- brick("lndsr.L5169054_05420101216.hdf")
Error in .rasterObjectFromFile(x, objecttype = "RasterBrick", ...) :
Cannot create a RasterLayer object from this file.
In addition: Warning message:
In .rasterFromGDAL(x, band = band, objecttype, ...) :
GeoTransform values not available; georeferencing will not be correct
>
but GDALinfo() is correct.
Cannot test hdf5 or readGDAL() in R as the file is huge
I guess the problem is in QGIS (and R package raster)? I'm not sure,
as I do not know if
subdatasets can be selected for reading using gdal.
Agus
2012/5/2 Even Rouault <even.rouault at mines-paris.org>:
> Selon Agustin Lobo <alobolistas at gmail.com>:
>
>> Hi!
>>
>> The gdal info of a multiband satellite image in hdf is reported by
>> gdal as "Size is 512, 512"
>> in contradiction with the size of the subdatasets. QGIS and R
>> (raster+rgdal) report an error at opening the file,
>> while envi and HDFLook can open it with no problem. I include the
>> gdalinfo output and the
>> info reported by HDFLook. Any help appreciated.
>
> I don't consider that to be a problem. The size reported on a GDAL dataset that
> is only made of subdatasets (that is to say when the dataset has no raster bands
> in itself, which is the case here) has no meaning, and is put to a default value
> of 512x512. You have to open the subdatasets to know their size(in the case of
> HDF4, the description of the subdataset also give them). There are cases where
> the subdsatasets have different sizes, so it would be impossible to set a
> significant value for the size of the dataset.
>
>> Thanks
>> Agus
>>
>> $ gdalinfo --version
>> GDAL 1.8.0, released 2011/01/12
>>
>> $ gdalinfo lndsr.L5169054_05420101216.hdf
>> Driver: HDF4/Hierarchical Data Format Release 4
>> Files: lndsr.L5169054_05420101216.hdf
>> Size is 512, 512
>> Coordinate System is `'
>> Metadata:
>> DataProvider=UMD
>> Satellite=LANDSAT_5
>> Instrument=TM
>> AcquisitionDate=2010-12-16T00:00:00.000000Z
>> Level1ProductionDate=2012-02-22T00:00:00.000000Z
>> SolarZenith=42.02009
>> SolarAzimuth=141.4236
>> WRS_System=2
>> WRS_Path=169
>> WRS_Row=54
>> NumberOfBands=6
>> BandNumbers=1, 2, 3, 4, 5, 7
>> ShortName=L5TSR
>> LocalGranuleID=L5TSR.a2010350.w2p169r054.020.2012117105207.hdf
>> ProductionDate=2012-04-26T10:52:07Z
>> PGEVersion=1.0.9
>> ProcessVersion=1.0.4
>> WestBoundingCoordinate=36.6199876177544
>> EastBoundingCoordinate=38.780676500528
>> NorthBoundingCoordinate=9.61826703329522
>> SouthBoundingCoordinate=7.72285510894074
>> OrientationAngle=0
>> PixelSize=30
>> HDFEOSVersion=HDFEOS_V2.4
>> Cloud Mask Algo Version=CMReflectanceBasedv1.0
>> Subdatasets:
>>
>>
> SUBDATASET_1_NAME=HDF4_EOS:EOS_GRID:"lndsr.L5169054_05420101216.hdf":Grid:band1
>> SUBDATASET_1_DESC=[6961x7901] band1 Grid (16-bit integer)
>>
>>
> SUBDATASET_2_NAME=HDF4_EOS:EOS_GRID:"lndsr.L5169054_05420101216.hdf":Grid:band2
>> SUBDATASET_2_DESC=[6961x7901] band2 Grid (16-bit integer)
>>
>>
> SUBDATASET_3_NAME=HDF4_EOS:EOS_GRID:"lndsr.L5169054_05420101216.hdf":Grid:band3
>> SUBDATASET_3_DESC=[6961x7901] band3 Grid (16-bit integer)
>>
>>
> SUBDATASET_4_NAME=HDF4_EOS:EOS_GRID:"lndsr.L5169054_05420101216.hdf":Grid:band4
>> SUBDATASET_4_DESC=[6961x7901] band4 Grid (16-bit integer)
>>
>>
> SUBDATASET_5_NAME=HDF4_EOS:EOS_GRID:"lndsr.L5169054_05420101216.hdf":Grid:band5
>> SUBDATASET_5_DESC=[6961x7901] band5 Grid (16-bit integer)
>>
>>
> SUBDATASET_6_NAME=HDF4_EOS:EOS_GRID:"lndsr.L5169054_05420101216.hdf":Grid:band7
>> SUBDATASET_6_DESC=[6961x7901] band7 Grid (16-bit integer)
>>
>>
> SUBDATASET_7_NAME=HDF4_EOS:EOS_GRID:"lndsr.L5169054_05420101216.hdf":Grid:atmos_opacity
>> SUBDATASET_7_DESC=[6961x7901] atmos_opacity Grid (16-bit integer)
>>
>>
> SUBDATASET_8_NAME=HDF4_EOS:EOS_GRID:"lndsr.L5169054_05420101216.hdf":Grid:lndsr_QA
>> SUBDATASET_8_DESC=[6961x7901] lndsr_QA Grid (16-bit integer)
>>
>>
> SUBDATASET_9_NAME=HDF4_EOS:EOS_GRID:"lndsr.L5169054_05420101216.hdf":Grid:band6
>> SUBDATASET_9_DESC=[6961x7901] band6 Grid (16-bit integer)
>> Corner Coordinates:
>> Upper Left ( 0.0, 0.0)
>> Lower Left ( 0.0, 512.0)
>> Upper Right ( 512.0, 0.0)
>> Lower Right ( 512.0, 512.0)
>> Center ( 256.0, 256.0)
>>
>>
>> HDFLooK:
>>
>> Global attributes: 26
>> DataProvider:
>>
> UMDLANDSAT_5TM2010-12-16T00:00:00.000000Z2012-02-22T00:00:00.000000Z SolarZenith: 42.0201
>> SolarAzimuth: 141.424
>> 2 WRS_Path: 169
>> WRS_Row: 54
>> NumberOfBands: 6
>> BandNumbers: 1, 2, 3, 4, 5, 7
>>
> L5TSRL5TSR.a2010350.w2p169r054.020.2012117105207.hdf2012-04-26T10:52:07Z1.0.91.0.4 WestBoundingCoordinate: 36.62
>> EastBoundingCoordinate: 38.7807
>> NorthBoundingCoordinate: 9.61827
>> SouthBoundingCoordinate: 7.72286
>> OrientationAngle: 0
>> PixelSize: 30
>>
> HDFEOS_V2.4-----------------------------------------------------------------------------------
>> GROUP=SwathStructure
>> END_GROUP=SwathStructure
>> GROUP=GridStructure
>> GROUP=GRID_1
>> GridName="Grid"
>> XDim=7901
>> YDim=6961
>> UpperLeftPointMtrs=(238785.000000,1063215.000000)
>> LowerRightMtrs=(475815.000000,854385.000000)
>> Projection=GCTP_UTM
>> ZoneCode=37
>> SphereCode=12
>> GridOrigin=HDFE_GD_UL
>> GROUP=Dimension
>> END_GROUP=Dimension
>> GROUP=DataField
>> OBJECT=DataField_0
>> DataFieldName="band1"
>> DataType=DFNT_INT16
>> DimList=("YDim","XDim")
>> END_OBJECT=DataField_0
>> OBJECT=DataField_1
>> DataFieldName="band2"
>> DataType=DFNT_INT16
>> DimList=("YDim","XDim")
>> END_OBJECT=DataField_1
>> OBJECT=DataField_2
>> DataFieldName="band3"
>> DataType=DFNT_INT16
>> DimList=("YDim","XDim")
>> END_OBJECT=DataField_2
>> OBJECT=DataField_3
>> DataFieldName="band4"
>> DataType=DFNT_INT16
>> DimList=("YDim","XDim")
>> END_OBJECT=DataField_3
>> OBJECT=DataField_4
>> DataFieldName="band5"
>> DataType=DFNT_INT16
>> DimList=("YDim","XDim")
>> END_OBJECT=DataField_4
>> OBJECT=DataField_5
>> DataFieldName="band7"
>> DataType=DFNT_INT16
>> DimList=("YDim","XDim")
>> END_OBJECT=DataField_5
>> OBJECT=DataField_6
>> DataFieldName="atmos_opacity"
>> DataType=DFNT_INT16
>> DimList=("YDim","XDim")
>> END_OBJECT=DataField_6
>> OBJECT=DataField_7
>> DataFieldName="lndsr_QA"
>> DataType=DFNT_INT16
>> DimList=("YDim","XDim")
>> END_OBJECT=DataField_7
>> OBJECT=DataField_9
>> DataFieldName="band6"
>> DataType=DFNT_INT16
>> DimList=("YDim","XDim")
>> END_OBJECT=DataField_9
>> END_GROUP=DataField
>> GROUP=MergedFields
>> END_GROUP=MergedFields
>> END_GROUP=GRID_1
>> END_GROUP=GridStructure
>> GROUP=PointStructure
>> END_GROUP=PointStructure
>> END
>>
> -----------------------------------------------------------------------------------
>> CMReflectanceBasedv1.0
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>>
>
>
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