https://github.com/humbertodias/noaa-parse-grib-files
Java Way to download and parse GRIB files
https://github.com/humbertodias/noaa-parse-grib-files
java noaa
Last synced: 9 months ago
JSON representation
Java Way to download and parse GRIB files
- Host: GitHub
- URL: https://github.com/humbertodias/noaa-parse-grib-files
- Owner: humbertodias
- Created: 2016-03-30T15:04:30.000Z (about 10 years ago)
- Default Branch: master
- Last Pushed: 2024-02-15T16:18:59.000Z (over 2 years ago)
- Last Synced: 2025-09-06T21:12:53.475Z (9 months ago)
- Topics: java, noaa
- Language: Java
- Size: 20.5 KB
- Stars: 10
- Watchers: 3
- Forks: 3
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
Awesome Lists containing this project
README
# Parsing Grib Files
Java Way to download and parse GRIB files.
**NOAA - National Oceanic and Atmospheric Administration**
1. NOAA Servers
[http://www.nco.ncep.noaa.gov/pmb/products/](http://www.nco.ncep.noaa.gov/pmb/products/)
2. Global Forecast System (GFS)
[http://www.nco.ncep.noaa.gov/pmb/products/gfs/](http://www.nco.ncep.noaa.gov/pmb/products/gfs/)
3. FTP Wave files
[http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/prod/](http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/prod/)
4. File formats
[http://www.nco.ncep.noaa.gov/pmb/products/wave](http://www.nco.ncep.noaa.gov/pmb/products/wave/)
## Prerequires
1. Git 2.6+
2. Maven 3+
3. Java 8+
## How to Play
Clone
```shell
git clone https://github.com/humbertodias/noaa-parse-grib-files.git
```
Inside the folder
```shell
cd noaa-parse-grib-files
```
File Source Information
[http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/prod/glwu.20180214/glwu.grlc_2p5km_sr.t02z.grib2](http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/prod/glwu.20180214/glwu.grlc_2p5km_sr.t02z.grib2)
**Directory format**
```
/glw.20180214
YYYY
MM
DD
```
***File format***
[glw.grlc_2p5km.t00z.grib2](http://www.nco.ncep.noaa.gov/pmb/products/wave/glw.grlc_2p5km.t00z.grib2.shtml)
Run
```shell
mvn compile exec:java \
-Dexec.mainClass="com.noaa.grib.Grib2Decoder" \
-Dexec.args="http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/prod/glwu.20180224/glwu.grlc_2p5km.t01z.grib2"
```
## Output
```
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building noaa-grib-ucar 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ grid-decoder ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ grid-decoder ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 2 source files to /Users/humbertodias/git/noaa-parse-grib-files/target/classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ grid-decoder ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/humbertodias/git/noaa-parse-grib-files/src/test/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ grid-decoder ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ grid-decoder ---
[INFO] No tests to run.
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ grid-decoder ---
[INFO] Building jar: /Users/humbertodias/git/noaa-parse-grib-files/target/grid-decoder-1.0-SNAPSHOT.jar
[INFO]
[INFO] --- exec-maven-plugin:1.4.0:java (default-cli) @ grid-decoder ---
2018-02-20 20:23:06 INFO Util:32 - Downloading http://www.ftp.ncep.noaa.gov/data/nccf/com/wave/prod/glwu.20180214/glwu.grlc_2p5km_sr.t02z.grib2 in /tmp/glwu.grlc_2p5km_sr.t02z.grib2
--------------------------------------------------------------------
Header : GRIB2
Discipline : 10 Oceanographic products
GRIB Edition : 2
GRIB length : 27840
Originating Center : 7 US National Weather Service - NCEP(WMC)
Originating Sub-Center : 0
Significance of Reference Time : 1 Start of forecast
Reference Time : 2018-02-14T02:00:00Z
Product Status : 0 Operational products
Product Type : 1 Forecast products
Number of data points : 209741
Grid Name : 30 Lambert_Conformal
Grid Shape : 6 Earth spherical with radius of 6,371,229.0 m
Nx : 581
Ny : 361
La1 : 41.53071
Lo1 : 267.364
Resolution & Component flags : 0
Winds : True
LaD : 25.0
LoV : 265.0
Dx : 2539.703
Dy : 2539.703
Grid Units : m
Projection center : 0
Scanning mode : 64
Latin1 : 25.0
Latin2 : 25.0
SpLat : -90.0
SpLon : 0.0
Product Definition : 0 Analysis/forecast at horizontal level/layer at a point in time
Parameter Category : 0 Waves
Parameter Name : 9 Mean_period_of_swell_waves
Parameter Units : s
Generating Process Type : 2 Forecast
ForecastTime : 48
First Surface Type : 241 Ordered Sequence of Data
First Surface value : 2.0
Second Surface Type : 255 Missing
Second Surface value : 0.0
--------------------------------------------------------------------
Header : GRIB2
Discipline : 10 Oceanographic products
GRIB Edition : 2
GRIB length : 44279
Originating Center : 7 US National Weather Service - NCEP(WMC)
Originating Sub-Center : 0
Significance of Reference Time : 1 Start of forecast
Reference Time : 2018-02-14T02:00:00Z
Product Status : 0 Operational products
Product Type : 1 Forecast products
Number of data points : 209741
Grid Name : 30 Lambert_Conformal
Grid Shape : 6 Earth spherical with radius of 6,371,229.0 m
Nx : 581
Ny : 361
La1 : 41.53071
Lo1 : 267.364
Resolution & Component flags : 0
Winds : True
LaD : 25.0
LoV : 265.0
Dx : 2539.703
Dy : 2539.703
Grid Units : m
Projection center : 0
Scanning mode : 64
Latin1 : 25.0
Latin2 : 25.0
SpLat : -90.0
SpLon : 0.0
Product Definition : 0 Analysis/forecast at horizontal level/layer at a point in time
Parameter Category : 0 Waves
Parameter Name : 4 Direction_of_wind_waves
Parameter Units : degrees
Generating Process Type : 2 Forecast
ForecastTime : 48
First Surface Type : 1 Ground or water surface
First Surface value : 1.0
Second Surface Type : 255 Missing
Second Surface value : 0.0
--------------------------------------------------------------------
Header : GRIB2
Discipline : 10 Oceanographic products
GRIB Edition : 2
GRIB length : 35903
Originating Center : 7 US National Weather Service - NCEP(WMC)
Originating Sub-Center : 0
Significance of Reference Time : 1 Start of forecast
Reference Time : 2018-02-14T02:00:00Z
Product Status : 0 Operational products
Product Type : 1 Forecast products
Number of data points : 209741
Grid Name : 30 Lambert_Conformal
Grid Shape : 6 Earth spherical with radius of 6,371,229.0 m
Nx : 581
Ny : 361
La1 : 41.53071
Lo1 : 267.364
Resolution & Component flags : 0
Winds : True
LaD : 25.0
LoV : 265.0
Dx : 2539.703
Dy : 2539.703
Grid Units : m
Projection center : 0
Scanning mode : 64
Latin1 : 25.0
Latin2 : 25.0
SpLat : -90.0
SpLon : 0.0
Product Definition : 0 Analysis/forecast at horizontal level/layer at a point in time
Parameter Category : 0 Waves
Parameter Name : 7 Direction_of_swell_waves
Parameter Units : degrees
Generating Process Type : 2 Forecast
ForecastTime : 48
First Surface Type : 241 Ordered Sequence of Data
First Surface value : 1.0
Second Surface Type : 255 Missing
Second Surface value : 0.0
--------------------------------------------------------------------
Header : GRIB2
Discipline : 10 Oceanographic products
GRIB Edition : 2
GRIB length : 28607
Originating Center : 7 US National Weather Service - NCEP(WMC)
Originating Sub-Center : 0
Significance of Reference Time : 1 Start of forecast
Reference Time : 2018-02-14T02:00:00Z
Product Status : 0 Operational products
Product Type : 1 Forecast products
Number of data points : 209741
Grid Name : 30 Lambert_Conformal
Grid Shape : 6 Earth spherical with radius of 6,371,229.0 m
Nx : 581
Ny : 361
La1 : 41.53071
Lo1 : 267.364
Resolution & Component flags : 0
Winds : True
LaD : 25.0
LoV : 265.0
Dx : 2539.703
Dy : 2539.703
Grid Units : m
Projection center : 0
Scanning mode : 64
Latin1 : 25.0
Latin2 : 25.0
SpLat : -90.0
SpLon : 0.0
Product Definition : 0 Analysis/forecast at horizontal level/layer at a point in time
Parameter Category : 0 Waves
Parameter Name : 7 Direction_of_swell_waves
Parameter Units : degrees
Generating Process Type : 2 Forecast
ForecastTime : 48
First Surface Type : 241 Ordered Sequence of Data
First Surface value : 2.0
Second Surface Type : 255 Missing
Second Surface value : 0.0
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 03:51 min
[INFO] Finished at: 2018-02-20T19:19:31Z
[INFO] Final Memory: 18M/161M
[INFO] ------------------------------------------------------------------------
```
## References
1. [Processing Grib Data](http://donpedro.lediouris.net/software/processing.grib/index.html)
2. [Applications](http://st-martin-basic.blogspot.com.br/2012/01/applications-pour-lire-et-explorer-les.html)
3. [zyGrib](http://www.zygrib.org/)
4. [Grib 1 - Format](http://www.wmo.int/pages/prog/www/WMOCodes/Guides/GRIB/GRIB1-Contents.html)
5. [Grib 2 - Format](https://www.wmo.int/pages/prog/www/WMOCodes/Guides/GRIB/GRIB2_062006.pdf)