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BITPlan / com.bitplan.radolan

parses the DWD RADOLAN / RADVOR radar composite format - Java port of https://gitlab.cs.fau.de/since/radolan
Apache License 2.0
2 stars 1 forks source link

Questions about #9

Open JasonChen1995 opened 4 years ago

JasonChen1995 commented 4 years ago

Thanks for your wonderful work! I test 'java -jar radolan -i https://opendata.dwd.de/weather/radar/radolan/rw/raa01-rw_10000-2010280850-dwd---bin -o rw2020-10-28_0850.png -st 5' and I can get the right figure.

But when I try to parse the file in 'https://opendata.dwd.de/climate_environment/CDC/grids_germany/5_minutes/radolan/reproc/2017_002/bin/', the program will crash. For example, I download 'https://opendata.dwd.de/climate_environment/CDC/grids_germany/5_minutes/radolan/reproc/2017_002/bin/2019/YW2017.002_201901.tar', unzip the file and get many files(e.g. raa01-yw2017.002_10000-1901010000-dwd---bin), then I try to parse the file 'raa01-yw2017.002_10000-1901010000-dwd---bin' and the program crashed (errors are shown in the png). image I would appreciate it if you could give me some suggestions, thanks!

WolfgangFahl commented 4 years ago

The rw source is only available for the last few hours so i had to modify the link to today's data

java -jar release/radolan.jar -i https://opendata.dwd.de/weather/radar/radolan/rw/raa01-rw_10000-2011020850-dwd---bin -o /tmp/rw2020-10-28_0850.png -st 5

To get the RW dump result: rw2020-10-28_0850

as the working example. For the other example if need to look into the issue.

WolfgangFahl commented 4 years ago

It looks like you are trying to use YW data as described in https://www.dwd.de/DE/leistungen/radarklimatologie/radklim_kompositformat_1_0.pdf?__blob=publicationFile&v=1 - this product is not supported yet - you might want to change the software - a pull request is welcome.

https://gitlab.cs.fau.de/since/radolan/-/blob/master/radolan.go shows the products the original golang library this java code was ported from was supporting. Not all of these have yet been adopted in the Java version. It looks like the YW product is newer and wasn't there at the time the software was created. If you are flexible in the choice of your programming language http://wiki.bitplan.com/index.php/Radolan#Other_Libraries might have a library that suits your needs.