Saya memiliki file NetCDF yang berisi data jumlah hari hujan di Inggris. Saya ingin mengonversinya menjadi GeoTIFF, tetapi tidak dapat membuat GDAL dengan benar georeferensi itu. Lihat kesedihan dari gdalinfo di bawah ini.
Saya ingin TIFF band tunggal yang menunjukkan variabel "raindays_tmean_abs". Variabel "lat" dan "lon" tampaknya memiliki nilai min / max yang masuk akal untuk menempatkan data di Inggris, tetapi ketika saya mengonversinya dengan gdal_translate, ia berakhir di lepas pantai barat Afrika.
Ada peringatan tentang dimensi pertama yang bukan dimensi "Waktu atau Vertikal". Saya membaca bahwa gdal mengharapkan data dalam urutan tertentu, jadi mungkin ini masalahnya, tapi saya tidak tahu bagaimana memodifikasinya.
Bagaimana saya mengonversi / memproyeksikan ulang data ini?
gdalinfo NETCDF: RainDays1_1961-1990_LTA_25km.nc
Warning 1: dimension #0 (meaning_period) is not a Time or Vertical dimension.
Driver: netCDF/Network Common Data Format
Files: RainDays1_1961-1990_LTA_25km.nc
RainDays1_1961-1990_LTA_25km.nc.aux.xml
Size is 39, 52
Coordinate System is `'
Origin = (-17.650008352179277,11.329999312758446)
Pixel Size = (0.219999614514803,-0.219999998807907)
Metadata:
axis_0#units=
meaning_period#comment=Meaning periods are all months (12) beginning January, all seasons (4) beginning Winter (DJF) and Annual (1)
meaning_period#long_name=meaning_period
meaning_period#units=
NC_GLOBAL#Conventions=CF-1.0
NETCDF_DIM_EXTRA={meaning_period}
NETCDF_DIM_meaning_period_DEF={17,6}
NETCDF_DIM_meaning_period_VALUES={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}
raindays_tmean_abs#comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
raindays_tmean_abs#coordinates=lon lat
raindays_tmean_abs#long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
raindays_tmean_abs#missing_value=1e+020
raindays_tmean_abs#name=rain_days
raindays_tmean_abs#title=rain_days
raindays_tmean_abs#units=days
rlat#axis=Y
rlat#bounds=bounds_rlat
rlat#long_name=latitude in rotated pole grid
rlat#standard_name=grid_latitude
rlat#units=degrees
rlon#axis=X
rlon#bounds=bounds_rlon
rlon#long_name=longitude in rotated pole grid
rlon#modulo=360
rlon#standard_name=grid_longitude
rlon#topology=circular
rlon#units=degrees
Subdatasets:
SUBDATASET_1_NAME=NETCDF:"RainDays1_1961-1990_LTA_25km.nc":bounds_rlat
SUBDATASET_1_DESC=[52x2] bounds_rlat (64-bit floating-point)
SUBDATASET_2_NAME=NETCDF:"RainDays1_1961-1990_LTA_25km.nc":bounds_rlon
SUBDATASET_2_DESC=[39x2] bounds_rlon (64-bit floating-point)
SUBDATASET_3_NAME=NETCDF:"RainDays1_1961-1990_LTA_25km.nc":lat
SUBDATASET_3_DESC=[52x39] latitude (32-bit floating-point)
SUBDATASET_4_NAME=NETCDF:"RainDays1_1961-1990_LTA_25km.nc":lon
SUBDATASET_4_DESC=[52x39] longitude (32-bit floating-point)
SUBDATASET_5_NAME=NETCDF:"RainDays1_1961-1990_LTA_25km.nc":raindays_tmean_abs
SUBDATASET_5_DESC=[17x52x39] raindays_tmean_abs (32-bit floating-point)
Geolocation:
LINE_OFFSET=0
LINE_STEP=1
PIXEL_OFFSET=0
PIXEL_STEP=1
SRS=GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9108"]],AUTHORITY["EPSG","4326"]]
X_BAND=1
X_DATASET=NETCDF:"RainDays1_1961-1990_LTA_25km.nc":lon
Y_BAND=1
Y_DATASET=NETCDF:"RainDays1_1961-1990_LTA_25km.nc":lat
Corner Coordinates:
Upper Left ( -17.6500084, 11.3299993)
Lower Left ( -17.6500084, -0.1100006)
Upper Right ( -9.0700234, 11.3299993)
Lower Right ( -9.0700234, -0.1100006)
Center ( -13.3600159, 5.6099993)
Band 1 Block=39x1 Type=Float32, ColorInterp=Undefined
Min=10.658 Max=22.949
Minimum=10.658, Maximum=22.949, Mean=15.625, StdDev=3.151
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=0
NETCDF_VARNAME=raindays_tmean_abs
STATISTICS_MAXIMUM=22.949373245239
STATISTICS_MEAN=15.624619410087
STATISTICS_MINIMUM=10.657625198364
STATISTICS_STDDEV=3.1508820627895
title=rain_days
units=days
Band 2 Block=39x1 Type=Float32, ColorInterp=Undefined
Min=7.893 Max=17.172
Minimum=7.893, Maximum=17.172, Mean=11.591, StdDev=2.282
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=1
NETCDF_VARNAME=raindays_tmean_abs
STATISTICS_MAXIMUM=17.172254562378
STATISTICS_MEAN=11.591275386767
STATISTICS_MINIMUM=7.8926663398743
STATISTICS_STDDEV=2.28225356537
title=rain_days
units=days
Band 3 Block=39x1 Type=Float32, ColorInterp=Undefined
Min=9.700 Max=21.762
Minimum=9.700, Maximum=21.762, Mean=13.882, StdDev=2.988
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=2
NETCDF_VARNAME=raindays_tmean_abs
STATISTICS_MAXIMUM=21.761842727661
STATISTICS_MEAN=13.88236379732
STATISTICS_MINIMUM=9.7001943588257
STATISTICS_STDDEV=2.9875935432638
title=rain_days
units=days
Band 4 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=3
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 5 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=4
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 6 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=5
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 7 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=6
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 8 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=7
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 9 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=8
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 10 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=9
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 11 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=10
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 12 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=11
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 13 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=12
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 14 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=13
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 15 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=14
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 16 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=15
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
Band 17 Block=39x1 Type=Float32, ColorInterp=Undefined
NoData Value=1.0000000200408773e+020
Metadata:
comment=Converted from UKCP09 monthly data to climatologies and then averaged to 25km rotated pole grid.
coordinates=lon lat
long_name=Number of days per meaning period having a rainfall >= 1 mm (days)
missing_value=1e+020
name=rain_days
NETCDF_DIM_meaning_period=16
NETCDF_VARNAME=raindays_tmean_abs
title=rain_days
units=days
gdalinfo NETCDF: RainDays1_1961-1990_LTA_25km.nc: lon
Driver: netCDF/Network Common Data Format
Files: RainDays1_1961-1990_LTA_25km.nc
RainDays1_1961-1990_LTA_25km.nc.aux.xml
Size is 39, 52
Coordinate System is `'
Origin = (-17.650008352179277,11.329999312758446)
Pixel Size = (0.219999614514803,-0.219999998807907)
Metadata:
axis_0#units=
lon#long_name=longitude
lon#missing_value=1e+020
lon#name=lon
lon#standard_name=longitude
lon#units=degrees_east
meaning_period#comment=Meaning periods are all months (12) beginning January, all seasons (4) beginning Winter (DJF) and Annual (1)
meaning_period#long_name=meaning_period
meaning_period#units=
NC_GLOBAL#Conventions=CF-1.0
rlat#axis=Y
rlat#bounds=bounds_rlat
rlat#long_name=latitude in rotated pole grid
rlat#standard_name=grid_latitude
rlat#units=degrees
rlon#axis=X
rlon#bounds=bounds_rlon
rlon#long_name=longitude in rotated pole grid
rlon#modulo=360
rlon#standard_name=grid_longitude
rlon#topology=circular
rlon#units=degrees
Corner Coordinates:
Upper Left ( -17.6500084, 11.3299993)
Lower Left ( -17.6500084, -0.1100006)
Upper Right ( -9.0700234, 11.3299993)
Lower Right ( -9.0700234, -0.1100006)
Center ( -13.3600159, 5.6099993)
Band 1 Block=39x1 Type=Float32, ColorInterp=Undefined
Min=-15.830 Max=3.672
Minimum=-15.830, Maximum=3.672, Mean=-5.246, StdDev=4.393
NoData Value=1.0000000200408773e+020
Metadata:
long_name=longitude
missing_value=1e+020
name=lon
NETCDF_VARNAME=lon
standard_name=longitude
STATISTICS_MAXIMUM=3.671746969223
STATISTICS_MEAN=-5.2457962955782
STATISTICS_MINIMUM=-15.830010414124
STATISTICS_STDDEV=4.3927366732513
units=degrees_east
gdalinfo NETCDF: RainDays1_1961-1990_LTA_25km.nc: lat
Driver: netCDF/Network Common Data Format
Files: RainDays1_1961-1990_LTA_25km.nc
RainDays1_1961-1990_LTA_25km.nc.aux.xml
Size is 39, 52
Coordinate System is `'
Origin = (-17.650008352179277,11.329999312758446)
Pixel Size = (0.219999614514803,-0.219999998807907)
Metadata:
axis_0#units=
lat#long_name=latitude
lat#missing_value=1e+020
lat#name=lat
lat#standard_name=latitude
lat#units=degrees_north
meaning_period#comment=Meaning periods are all months (12) beginning January, all seasons (4) beginning Winter (DJF) and Annual (1)
meaning_period#long_name=meaning_period
meaning_period#units=
NC_GLOBAL#Conventions=CF-1.0
rlat#axis=Y
rlat#bounds=bounds_rlat
rlat#long_name=latitude in rotated pole grid
rlat#standard_name=grid_latitude
rlat#units=degrees
rlon#axis=X
rlon#bounds=bounds_rlon
rlon#long_name=longitude in rotated pole grid
rlon#modulo=360
rlon#standard_name=grid_longitude
rlon#topology=circular
rlon#units=degrees
Corner Coordinates:
Upper Left ( -17.6500084, 11.3299993)
Lower Left ( -17.6500084, -0.1100006)
Upper Right ( -9.0700234, 11.3299993)
Lower Right ( -9.0700234, -0.1100006)
Center ( -13.3600159, 5.6099993)
Band 1 Block=39x1 Type=Float32, ColorInterp=Undefined
Min=47.594 Max=60.806
Minimum=47.594, Maximum=60.806, Mean=54.186, StdDev=3.229
NoData Value=1.0000000200408773e+020
Metadata:
long_name=latitude
missing_value=1e+020
name=lat
NETCDF_VARNAME=lat
standard_name=latitude
STATISTICS_MAXIMUM=60.805950164795
STATISTICS_MEAN=54.185836173138
STATISTICS_MINIMUM=47.594329833984
STATISTICS_STDDEV=3.228754901642
units=degrees_north
gdal
coordinate-system
netcdf
Snorfalorpagus
sumber
sumber
Jawaban:
Netcdf Anda menggunakan grid tiang yang diputar. GDAL tidak mampu mengatasinya.
Ada tiket untuk itu: http://trac.osgeo.org/gdal/ticket/4285 yang memberikan beberapa solusi.
GMT memiliki alat yang disebut
grdrotateryang harus dapat bekerja dengan kutub yang diputar, tetapi saya belum menggunakannya.Jika Anda terbiasa dengan GRASS, Anda dapat mencoba solusi ini:
http://osgeo-org.1560.x6.nabble.com/NetCDF-rotated-pole-td4634232.html
sumber
Apakah Anda mencoba mengonversinya dengan gdal_translate?
Biasanya itu harus bekerja dengan menggunakan salah satu dari dua kemungkinan:
Solusi pertama: ekstrak setiap subdataset secara manual
Solusi kedua: biarkan gdal mengekstrak subdataset secara otomatis
Solusi kedua akan mengekstrak semua subdataset ke file yang terpisah.
Mungkin perlu untuk memasukkan
bendera
sumber
Ukuran piksel Anda berbeda di file Anda, GDAL mengeluh tentang itu, lihat:
Afaik, Anda harus memiliki ukuran piksel yang sama. Anda akan perlu mencoba ulang grid Anda untuk itu atau mengulangi grid dari awal. GMT adalah alat yang bagus untuk itu.
sumber