In order to check what is inside the grib file, I just installed the grib
API [1] and ran
grib_dump dwd_grib1_ispra_gmi202_2012063000 > tst.txt
The information I get looking into the txt file is:
***** FILE: dwd_grib1_ispra_gmi202_2012063000
#============== MESSAGE 1 ( length=68884 ) ==============
GRIB {
editionNumber = 1;
table2Version = 2;
# Offenbach (RSMC) (grib1/0.table)
centre = 78;
generatingProcessIdentifier = 207;
# U U-component of wind m s**-1 (grib1/2.0.2.table)
indicatorOfParameter = 33;
# Fixed height above ground height in meters (2 octets) (grib1/3.table)
indicatorOfTypeOfLevel = 105;
level = 10;
# Initialized analysis product for reference time (P1=0)
(grib1/5.table)
timeRangeIndicator = 1;
# Unknown code table entry ()
subCentre = 255;
paramId = 165;
#-READ ONLY- units = m s**-1;
#-READ ONLY- nameECMF = 10 metre U wind component;
#-READ ONLY- name = 10 metre U wind component;
decimalScaleFactor = 0;
dataDate = 20120630;
dataTime = 0;
# Hour (stepUnits.table)
stepUnits = 1;
stepRange = 0;
startStep = 0;
endStep = 0;
#-READ ONLY- marsParam = 33.2;
shortName = 10u;
GDSPresent = 1;
bitmapPresent = 1;
numberOfVerticalCoordinateValues = 0;
Ni = 201;
Nj = 161;
latitudeOfFirstGridPointInDegrees = 35;
longitudeOfFirstGridPointInDegrees = -10;
earthIsOblate = 0;
uvRelativeToGrid = 0;
latitudeOfLastGridPointInDegrees = 74.96;
longitudeOfLastGridPointInDegrees = 40.04;
iScansNegatively = 0;
jScansPositively = 1;
jPointsAreConsecutive = 0;
#-READ ONLY- alternativeRowScanning = 0;
jDirectionIncrementInDegrees = 0.24975;
iDirectionIncrementInDegrees = 0.2502;
#-READ ONLY- numberOfDataPoints = 32361;
#-READ ONLY- numberOfValues = 32361;
missingValue = 9999;
tableReference = 0;
#-READ ONLY- binaryScaleFactor = -11;
#-READ ONLY- referenceValue = -11.346;
sphericalHarmonics = 0;
complexPacking = 0;
integerPointValues = 0;
additionalFlagPresent = 0;
packingType = grid_simple;
bitsPerValue = 16;
values(32361) = {
1.5509548187e+00, 1.4977321625e+00, 1.5494899750e+00, 1.6993923187e+00,
1.9513454437e+00,
2.2316188812e+00, 2.5079860687e+00, 2.7740993500e+00, 3.0099391937e+00,
3.2716579437e+00,
3.5905056000e+00, 3.9567165375e+00, 4.3610134125e+00, 4.6178493500e+00,
4.2081813812e+00,
1.7648220062e+00, 1.5626735687e+00, 1.2032985687e+00, 6.4226341248e-01,
4.3620872498e-01,
6.7986106873e-01, -9.1135025024e-02, 8.1716537476e-02, 2.3650169373e-01,
5.7488059998e-01,
8.7077903748e-01, 3.6931419373e-01, -2.2541236877e-01, -7.8439712524e-02,
-6.3312721252e-01,
-7.3127174377e-01, -3.0500221252e-01, 4.7087669373e-01, 8.9812278748e-01,
7.7019309998e-01,
6.2175559998e-01, 7.5798606873e-01, 6.8425559998e-01, 9.6941184998e-01,
1.1735134125e+00,
7.9851341248e-01, 2.5163841248e-01, -6.4386940002e-01, -1.0427951813e+00,
-9.9543190002e-01,
-2.3191623688e+00, -1.5120334625e+00, 5.5388450623e-01, 1.7501735687e+00,
1.6022243500e+00,
-1.3963108063e+00, -2.5066623688e+00, -2.1536350250e+00,
-2.0496311188e+00, -1.8875217438e+00,
-1.5056858063e+00, -7.7424049377e-01, -8.3283424377e-01,
-9.7248268127e-01, -6.6681861877e-01,
-1.1380100250e+00, -2.5716037750e+00, -3.6634006500e+00,
-3.5447483063e+00, -2.6272678375e+00,
-1.4226779938e+00, -9.0168190002e-01, -8.6750221252e-01,
-1.0720920563e+00, -1.6135959625e+00,
-1.5720920563e+00, -1.0823459625e+00, -9.9201393127e-01,
-5.9504127502e-01, -7.6105690002e-01,
-1.1116428375e+00, -7.0002174377e-01, -2.5861549377e-01,
-2.4201393127e-01, 2.2673606873e-01,
5.2907943726e-02, -4.4318580627e-01, -6.2287330627e-01,
-6.9855690002e-01, -7.3615455627e-01,
-1.9607639313e+00, -2.2805881500e+00, -2.2483615875e+00,
-2.0520725250e+00, -1.8782444000e+00,
-1.7024631500e+00, -1.4602756500e+00, -1.1492404938e+00,
-8.0695533752e-01, -4.1486549377e-01,
4.3142318726e-02, 5.3532981873e-01, 9.9675559998e-01, 1.4259548187e+00,
1.8199977875e+00
... 32261 more values
}
#-READ ONLY- numberOfCodedValues = 32361;
#-READ ONLY- maximum = 13.5881;
#-READ ONLY- minimum = -11.346;
#-READ ONLY- average = 0.101585;
#-READ ONLY- numberOfMissing = 0;
#-READ ONLY- standardDeviation = 3.29306;
#-READ ONLY- skewness = -29313.5;
#-READ ONLY- kurtosis = 1.62527e+07;
#-READ ONLY- isConstant = 0;
gridType = regular_ll;
#-READ ONLY- getNumberOfValues = 32361;
[...]
So it looks like the information is actually there, but the gdal driver
can't handle it. Any hint?
Thanks,
Margherita
[1] http://www.ecmwf.int/products/data/software/grib_api.html
On Thu, Aug 23, 2012 at 8:53 AM, Margherita Di Leo <direg...@gmail.com>wrote:
> Hi all,
>
> I have a problem handling some grib files, I get a warning message and I
> can't understand how to deal with it..
>
> running gdalinfo, it says:
>
> Un-handled possible ensemble section center 78 subcenter 255
> [... several times, cut]
> Un-handled possible ensemble section center 78 subcenter 255
> Driver: GRIB/GRIdded Binary (.grb)
> Files:
> /home/leomarg/Desktop/Fire_event_test_case_Valencia/grib/dwd_grib1_ispra_gmi202_
> 2012063000
> Size is 201, 161
> Coordinate System is:
> GEOGCS["Coordinate System imported from GRIB file",
> DATUM["unknown",
> SPHEROID["Sphere",6367470,0]],
> PRIMEM["Greenwich",0],
> UNIT["degree",0.0174532925199433]]
> Origin = (-10.000000000000000,74.960000000000008)
> Pixel Size = (0.000000000000000,-0.000000000000000)
> Corner Coordinates:
> Upper Left ( -10.0000000, 74.9600000) ( 10d 0' 0.00"W, 74d57'36.00"N)
> Lower Left ( -10.0000000, 74.9600000) ( 10d 0' 0.00"W, 74d57'36.00"N)
> Upper Right ( -10.0000000, 74.9600000) ( 10d 0' 0.00"W, 74d57'36.00"N)
> Lower Right ( -10.0000000, 74.9600000) ( 10d 0' 0.00"W, 74d57'36.00"N)
> Center ( -10.0000000, 74.9600000) ( 10d 0' 0.00"W, 74d57'36.00"N)
> Band 1 Block=201x1 Type=Float64, ColorInterp=Undefined
> Description = 10[m] HTGL (Specified height level above ground)
> Metadata:
> GRIB_COMMENT=u-component (zonal) of wind [m/s]
> GRIB_ELEMENT=U
> GRIB_FORECAST_SECONDS=0 sec
> GRIB_REF_TIME= 1341014400 sec UTC
> GRIB_SHORT_NAME=10-HTGL
> GRIB_UNIT=[m/s]
> GRIB_VALID_TIME= 1341014400 sec UTC
> Band 2 Block=201x1 Type=Float64, ColorInterp=Undefined
> Description = 10[m] HTGL (Specified height level above ground)
> Metadata:
> GRIB_COMMENT=v-component (merdional) of wind [m/s]
> GRIB_ELEMENT=V
> GRIB_FORECAST_SECONDS=0 sec
> GRIB_REF_TIME= 1341014400 sec UTC
> GRIB_SHORT_NAME=10-HTGL
> GRIB_UNIT=[m/s]
> GRIB_VALID_TIME= 1341014400 sec UTC
>
> [...]
>
> Furthermore, when I try with gdal_translate to convert one of the bands in
> tif format, the size of the pixels created is 0x0.
>
> Thanks in advance for any hint.
>
> --
> Dr. Margherita Di Leo
>
--
Dr. Margherita Di Leo
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