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Added classes to download, decode and query GRIB wind layers. GRIB code can be disabled with variable ATOOLS_NO_GRIB. albar965/littlenavmap#283
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| Original file line number | Diff line number | Diff line change |
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| glib-1.0 - August 2003 - Original version | ||
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| g2libc-1.0.1 - May 2004 - Changed the library name from "libg2c.a" to | ||
| "libgrib2c.a" to avoid conflict with the g77 libg2c | ||
| library. | ||
| - Added support for Grid Definition Template 3.31, | ||
| Albers Equal Area. | ||
| - Changed most PDT templates in module pdstemplates to | ||
| allow negative surface values. | ||
| - Many minor changes to help get clean compiles. | ||
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| g2libc-1.0.2 - December 2004 - WMO approved the JPEG2000 and PNG Data | ||
| Representation Templates ( 5.40000 and 5.40010, | ||
| respectively ) for operational use. The templates | ||
| were assigned WMO values of 5.40 and 5.41, | ||
| respectively. Changes were made to the source to | ||
| recognize either template number. | ||
| - Fixed bug encountered when packing a near constant | ||
| field with DRT 5.40 or 5.40000 (JPEG2000). | ||
| - Added consistency check, provided by | ||
| Arthur Taylor/MDL, used when unpacking Data | ||
| Templates 7.2 and 7.3. | ||
| - Added functionality to support encoding of | ||
| "Missing" data values within the data field when | ||
| using Data Representation Templates 5.2 | ||
| (complex packing) and 5.3 (complex packing and | ||
| spatial differencing). See octets 23 - 31 in DRTs | ||
| 5.2 and 5.3 for more info on missing value | ||
| management. | ||
| - Increased the packing efficiency of Data | ||
| Representation Templates 5.2 and 5.3 by adding | ||
| MDL/Glahn algorithm for determining effective | ||
| groupings. | ||
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| g2libc-1.0.3 - December 2005 - Two bug fixes: 1) Error encoding constant | ||
| data field. 2) Error encoding grid with | ||
| large bitmap using DRT 5.40 - JPEG2000. | ||
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| g2libc-1.0.5 - August 2007 - Added GDT 3.204 Curvilinear Orthogonal Grid | ||
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| g2libc-1.1.7 - August 2008 - Added GDT 3.32768 Rot Lat/Lon E-grid (Arakawa) | ||
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| g2libc-1.1.8 - January 2009 - Initialize variable lencsec2 in routine g2_unpack2.c | ||
| variable ndpts in routine g2_unpack7.c | ||
| - Changed the structure name template to gtemplate to avoid | ||
| of reserved word in C++ | ||
| - Change routine seekgb.c to use 4 bytes instead of sizeof(g2int) | ||
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| g2libc-1.1.9 - June 2009 - Updated version jasper-1.900.1, libpng-1.2.35 and zlib-1.2.3 | ||
| - Fixed bug causing seg fault when using PNG 1.2.35 | ||
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| g2libc-1.2.0 - March 2010 - Added PDT 4.31 Satellite Product | ||
| - Added PDT 4.15 WAFS Product | ||
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| g2libc-1.2.1 - August 2010 - Added PDT 4.40,4.41,4.42,4.43 for Atmospheric Chemical Constituents | ||
| - Added GDT 3.32769 Rot Lat/Lon None E-grid (Arakawa) | ||
| - If section 2 has zero length, return IERR=0 | ||
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| g2libc-1.2.2 - March 2011 - Corrected PDT 4.42,4.43 for Atmospheric Chemical Constituents | ||
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| g2libc-1.2.3 - November 2011 - Fixed bugs in routines dec_png.c and enc_png.c | ||
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| g2libc-1.4.0 - May 2012 - Added PDT 4.44,4.45,4.46,4.47,4.48 for Aerosol products | ||
| - PDT 4.50,4.51,4.52 iand 4.91 for Categorical forecast at a horizonal | ||
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| g2libc-1.5.0 - Sept. 2013 - Added PDT 4.33,4.34,4.53,4.54,4.50 | ||
| - Added GDT 3.4,3.5,3.12,3.101,3.140 | ||
| - Free up memory igds | ||
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| g2libc-1.6.0 - October 2015 - Added PDT 4.57, 4.60, 4.61 and | ||
| - Allow a forecast time to be negative |
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| August 06, 2013 | ||
| W/SIB:VUONG | ||
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| g2clib Library. | ||
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| This library contains "C" decoder/encoder | ||
| routines for GRIB edition 2. The user API for the GRIB2 routines | ||
| is described in file "grib2c.doc". | ||
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| This "C" source code conatins many uses of the C++ | ||
| comment style "//". Please make sure you include the | ||
| appropriate compiler option in the CFLAGS variable in the | ||
| makefile to allow the use of "//" comment indicators. | ||
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| We have added support for PNG and JPEG2000 image compression | ||
| algorithms within the GRIB2 standard. If you would like | ||
| to compile this library to utilize these GRIB2 Templates, | ||
| make sure that -DUSE_PNG and -DUSE_JPEG2000 are specified | ||
| in the DEFS variable in the makefile. You will also need | ||
| to download and install the external libraries listed below, | ||
| if they are not already installed on your system. | ||
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| If you do not wish to bother with the external libs and | ||
| don't need PNG and JPEG2000 support, you can remove the | ||
| -DUSE_PNG and -DUSE_JPEG2000 flags from the DEFS variable | ||
| in the makefile. | ||
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| ------------------------------------------------------------------------------- | ||
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| External Libraries: | ||
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| libjasper.a - This library is a C implementation of the JPEG-2000 Part-1 | ||
| standard (i.e., ISO/IEC 15444-1). This library is required | ||
| if JPEG2000 support in GRIB2 is desired. If not, remove | ||
| the -DUSE_JPEG2000 option from the DEFS variable | ||
| in the makefile. | ||
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| Download version jasper-1.900.1 from the JasPer Project's | ||
| home page, http://www.ece.uvic.ca/~mdadams/jasper/. | ||
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| More information about JPEG2000 can be found at | ||
| http://www.jpeg.org/JPEG2000.html. | ||
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| libpng.a This library is a C implementation of the Portable Network | ||
| Graphics PNG image compression format. This library is required | ||
| if PNG support in GRIB2 is desired. If not, remove | ||
| the -DUSE_PNG option from the DEFS variable | ||
| in the makefile. | ||
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| If not already installed on your system, download version | ||
| libpng-1.2.44 from http://www.libpng.org/pub/png/libpng.html. | ||
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| More information about PNG can be found at | ||
| http://www.libpng.org/pub/png/. | ||
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| libz.a This library contains compression/decompression routines | ||
| used by libpng.a for PNG image compression support. | ||
| This library is required if PNG support in GRIB2 is desired. | ||
| If not, remove the -DUSE_PNG option from the DEFS variable | ||
| in g2lib/makefile. | ||
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| If not already installed on your system, download version | ||
| zlib-1.2.6 from http://www.gzip.org/zlib/. | ||
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| Original file line number | Diff line number | Diff line change |
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| #include "grib2.h" | ||
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| void cmplxpack(g2float *fld,g2int ndpts, g2int idrsnum,g2int *idrstmpl, | ||
| unsigned char *cpack, g2int *lcpack) | ||
| //$$$ SUBPROGRAM DOCUMENTATION BLOCK | ||
| // . . . . | ||
| // SUBPROGRAM: cmplxpack | ||
| // PRGMMR: Gilbert ORG: W/NP11 DATE: 2004-08-27 | ||
| // | ||
| // ABSTRACT: This subroutine packs up a data field using a complex | ||
| // packing algorithm as defined in the GRIB2 documention. It | ||
| // supports GRIB2 complex packing templates with or without | ||
| // spatial differences (i.e. DRTs 5.2 and 5.3). | ||
| // It also fills in GRIB2 Data Representation Template 5.2 or 5.3 | ||
| // with the appropriate values. | ||
| // | ||
| // PROGRAM HISTORY LOG: | ||
| // 2004-08-27 Gilbert | ||
| // | ||
| // USAGE: cmplxpack(g2float *fld,g2int ndpts, g2int idrsnum,g2int *idrstmpl, | ||
| // unsigned char *cpack, g2int *lcpack) | ||
| // INPUT ARGUMENT LIST: | ||
| // fld[] - Contains the data values to pack | ||
| // ndpts - The number of data values in array fld[] | ||
| // idrsnum - Data Representation Template number 5.N | ||
| // Must equal 2 or 3. | ||
| // idrstmpl - Contains the array of values for Data Representation | ||
| // Template 5.2 or 5.3 | ||
| // [0] = Reference value - ignored on input | ||
| // [1] = Binary Scale Factor | ||
| // [2] = Decimal Scale Factor | ||
| // . | ||
| // . | ||
| // [6] = Missing value management | ||
| // [7] = Primary missing value | ||
| // [8] = Secondary missing value | ||
| // . | ||
| // . | ||
| // [16] = Order of Spatial Differencing ( 1 or 2 ) | ||
| // . | ||
| // . | ||
| // | ||
| // OUTPUT ARGUMENT LIST: | ||
| // idrstmpl - Contains the array of values for Data Representation | ||
| // Template 5.3 | ||
| // [0] = Reference value - set by compack routine. | ||
| // [1] = Binary Scale Factor - unchanged from input | ||
| // [2] = Decimal Scale Factor - unchanged from input | ||
| // . | ||
| // . | ||
| // cpack - The packed data field (character*1 array) | ||
| // lcpack - length of packed field cpack[]. | ||
| // | ||
| // REMARKS: None | ||
| // | ||
| // ATTRIBUTES: | ||
| // LANGUAGE: C | ||
| // MACHINE: IBM SP | ||
| // | ||
| //$$$ | ||
| { | ||
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| if ( idrstmpl[6] == 0 ) { // No internal missing values | ||
| compack(fld,ndpts,idrsnum,idrstmpl,cpack,lcpack); | ||
| } | ||
| else if ( idrstmpl[6] == 1 || idrstmpl[6] == 2) { | ||
| misspack(fld,ndpts,idrsnum,idrstmpl,cpack,lcpack); | ||
| } | ||
| else { | ||
| printf("cmplxpack: Don:t recognize Missing value option."); | ||
| *lcpack=-1; | ||
| } | ||
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| } |
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