Advanced tips and tricks
This page covers some of the really low-level detail that should not concern most users, but advanced users may find helpful.
Java provides a generic framework for changing the run-time characteristics of Java applications such as RiskScape. For example, you can set the locale that the program uses (for Internationalization) or change how things like garbage collection behave.
You can change Java system properties by setting one of the following environment variables:
JAVA_TOOL_OPTIONS- note that these settings apply to all Java programs, not just RiskScape.
RISKSCAPE_OPTS- these settings only apply to RiskScape.
In addition, Java also supports
JVM_OPTS (Linux) and
However, there is less universal support for these latter environment variables, as they tend to
be either platform-specific or undocumented.
As there are multiple different ways of setting Java system properties, the following precedence takes effect:
Any system properties that RiskScape might set by default.
We recommend you talk to a RiskScape developer first before experimenting, as changing Java system properties could have a detrimental effect on RiskScape behaviour.
Using quotes in the terminal
Generally, it’s recommended to always use double-quotes when specifying parameters for the
riskscape model run command.
However, Windows users may experience annoying terminal behaviour where the quote mark won’t be displayed immediately after it is typed. To check if this problem affects you:
Open the Windows terminal.
Type the quote character, i.e.
If nothing is displayed, press the space bar. The quote mark should now be visible.
This appears to be a known issue on Windows.
Anecdotally, we have seen this problem resolve when unnecessary additional language packs were uninstalled. To check what language packs you currently have installed, select Settings -> Time and Language -> Language and then look under ‘Preferred languages’.
For an example of using RiskScape to loop over hazard files, see Running the same model repeatedly.
riskscape model batch command is not quite right for you, then you may be able to use shell scripting to run
RiskScape commands repeatedly.
Your terminal will usually support some sort of
for loop, that will let you iterate over a set of values.
The syntax for this will vary depending on what operating system and terminal you are using.
For example, in the Windows Command Prompt, the following statement will loop through a set of GeoTIFFs in the
and use them as the input hazard-layer for your model.
for %f in (data\*.tif) do riskscape model run MODEL_NAME -p "input-hazards.layer=%f" --output=output\%~nf
Wheres on Linux, the following bash code will do the same thing.
for f in $(ls data/*.tif) ; do riskscape model run MODEL_NAME -p "input-hazards.layer=$f" --output=output/$(basename $f) ; done
for loop command right can be a little tricky.
An alternative approach is to save the commands to a script file and then run the file as needed.
On Windows, this is called a batch file.
Below is an example of a Windows batch file that runs every model in the Getting started with RiskScape models tutorial project.
:: lines are comments that explain what the script does.
:: Make sure riskscape is present on our PATH :: (update this to match your RiskScape installation directory) set PATH=%PATH%;C:\RiskScape\riskscape\bin :: change to the directory that contains our project file cd C:\RiskScape_Projects\getting-started :: define in a variable the models in our project that we want to run set models_to_run=basic-exposure exposure-reporting exposure-by-region :: loop through the models specified and run each one for %%x in (%models_to_run%) do ( call echo Running: riskscape model run %%x call riskscape model run %%x ) :: don't close the terminal when we're done echo DONE! pause
If things are getting repetitive, you can nest multiple
for loops together.
For example, the following batch file snippet would run all GeoTIFFs in a directory
through a series of different models.
for %%f in (data\*.tif) do ( for %%x in (%models_to_run%) do ( call echo Running: riskscape model run %%x hazard=%%f call riskscape model run %%x -p "input-hazards.layer=%%f" --output=output\%%x\%%~nf ) )
To avoid nested
for loops, you could alternatively combine the
riskscape model batch
command with a single
for loop. This would let you iterate through multiple different
things, without the batch file getting too complicated.