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Re: 20041214: dcgrib2 error - Grid too large 65535 x 512 [33553920 > 750000]
- Subject: Re: 20041214: dcgrib2 error - Grid too large 65535 x 512 [33553920 > 750000]
- Date: Tue, 14 Dec 2004 13:34:08 -0600
Ok, Yeah, I think it is a gaussian grid, thanks for the info.
Pete
In a previous message to me, you wrote:
>
>Pete,
>
>If I read your wgrib output correctly,
>the GDS type 4 is a gaussian grid which GEMPAK does not
>handle regardless of number of points since the GEMPAK
>grid library uses regularly spaced rows.
>
>When dealing with larger grids in general, you can define LLMXTG
>to the size of the input grid, while using LLMXGD as the largest
>subset of the LLMXTG for viewing and using the IJSKIP parameter.
>
>The ndfd decoder does support a GSKIP parameter for subsampling
>the input grib2 data, which is something I'll try to
>support in dcgrib2 in the future, but since you seem to
>have gaussian grids, that isn't going to solve your problem here.
>
>Steve Chiswell
>Unidata User Support
>
>
>>From: address@hidden (Pete Pokrandt)
>>Organization: UCAR/Unidata
>>Keywords: 200412141831.iBEIVXlI009124
>
>>--------
>>
>>Steve,
>>
>>A user of ours has some ECMWF grib files from an archive that he
>>cannot decode. The problem appears to be that the input grid
>>is too large. Is there any way to increase the dimensions, or
>>to have dcgrib2 decode only over a limited domain?
>>
>>The command used to convert was:
>>
>>cat mrz02_142_143.grb | /home/gempak/GEMPAK5.7.2p2/bin/linux/dcgrib2 -d ./te
>st
>> .log -e GEMTBL=/home/gempak/GEMPAK5.7.2p2/gempak/tables mrz02_142_143.gem
>>
>>The error message I get is:
>>[14912] 041214/1128 [DCGRIB -55] Grid too large 65535 x 512 [33553920 > 7500
>00
>> ]
>>
>>The grib file appears to be a 1/3 degree global grid, thinned in the x direc
>ti
>> on, so there are 512 points from SP to NP, and 1024 around the equator, wit
>h
>>fewer in the x direction as you move away from the equator.
>>
>>From grads 'wgrib', I have the following info:
>>
>>rec 1:0:date 2002010400 LSP kpds5=142 kpds6=1 kpds7=0 levels=(0,0) grid=255
>sf
>> c ECMWF stream? 24hr fcst:
>> LSP=Large scale precipitation m
>> timerange 0 P1 24 P2 0 TimeU 1 nx -1 ny 512 GDS grid 4 num_in_ave 0 missi
>ng
>> 0
>> center 98 subcenter 0 process 199 Table 128
>> thinned gaussian: lat 89.731000 to -89.731000
>> lon 0.000000 348528 grid pts (-1 x 512) scan 0 mode 0 bdsgrid 1 nl
>at
>> :
>> 18 25 32 40 45 50 60 64 72 72 75 81 90 96 1
>00
>> 108 120 120 125 135 144 150 160 160 180 180 180 192 192 2
>00
>> 216 216 216 225 240 240 243 250 256 270 270 288 288 288 3
>00
>> 300 320 320 320 324 360 360 360 360 360 360 375 375 384 3
>84
>> 400 400 400 432 432 432 432 432 450 450 450 480 480 480 4
>80
>> 480 486 500 500 500 512 512 540 540 540 540 540 576 576 5
>76
>> 576 576 576 600 600 600 600 600 640 640 640 640 640 640 6
>40
>> 640 648 675 675 675 675 675 675 720 720 720 720 720 720 7
>20
>> 720 720 729 729 750 750 750 750 750 768 768 768 768 800 8
>00
>> 800 800 800 800 800 800 810 810 864 864 864 864 864 864 8
>64
>> 864 864 864 864 864 864 864 900 900 900 900 900 900 900 9
>00
>> 900 900 900 960 960 960 960 960 960 960 960 960 960 960 9
>60
>> 960 960 960 960 960 960 960 960 960 960 972 972 972 972 9
>72
>> 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 10
>00
>> 1000 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 10
>24
>> 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 10
>24
>> 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 10
>24
>> 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 10
>24
>> 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 10
>24
>> 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 1024 10
>24
>> 1024 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 10
>00
>> 1000 1000 972 972 972 972 972 960 960 960 960 960 960 960 9
>60
>> 960 960 960 960 960 960 960 960 960 960 960 960 960 960 9
>00
>> 900 900 900 900 900 900 900 900 900 900 864 864 864 864 8
>64
>> 864 864 864 864 864 864 864 864 864 810 810 800 800 800 8
>00
>> 800 800 800 800 768 768 768 768 750 750 750 750 750 729 7
>29
>> 720 720 720 720 720 720 720 720 720 675 675 675 675 675 6
>75
>> 648 640 640 640 640 640 640 640 640 600 600 600 600 600 5
>76
>> 576 576 576 576 576 540 540 540 540 540 512 512 500 500 5
>00
>> 486 480 480 480 480 480 450 450 450 432 432 432 432 432 4
>00
>> 400 400 384 384 375 375 360 360 360 360 360 360 324 320 3
>20
>> 320 300 300 288 288 288 270 270 256 250 243 240 240 225 2
>16
>> 216 216 200 192 192 180 180 180 160 160 150 144 135 125 1
>20
>> 120 108 100 96 90 81 75 72 72 64 60 50 45 40
>32
>> 25 18
>> min/max data -2.6846e-17 0.302269 num bits 16 BDS_Ref -2.6846e-17 DecSc
>al
>> e 0 BinScale -17
>>
>>You can grab the input grib file for testing if that helps, from
>>http://sysadm.aos.wisc.edu/~poker/jan02_142_143.grb
>>
>>Thanks for any info or advice!
>>
>>Pete
>>--
>>+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+
>>^ Pete Pokrandt V 1447 AOSS Bldg 1225 W Dayton St^
>>^ Systems Programmer V Madison, WI 53706 ^
>>^ V address@hidden ^
>>^ Dept of Atmos & Oceanic Sciences V (608) 262-3086 (Phone/voicemail) ^
>>^ University of Wisconsin-Madison V 262-0166 (Fax) ^
>>+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+
>>
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+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+
^ Pete Pokrandt V 1447 AOSS Bldg 1225 W Dayton St^
^ Systems Programmer V Madison, WI 53706 ^
^ V address@hidden ^
^ Dept of Atmos & Oceanic Sciences V (608) 262-3086 (Phone/voicemail) ^
^ University of Wisconsin-Madison V 262-0166 (Fax) ^
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+