The PEER models, such as that designated above, consist of simple cases for different source types commonly encountered in a PSHA and are included in the nshmp-haz repository to support testing. See the [PEER directory](../../peer/) for more information.
The result of this calculation should be available as a single comma-delimited file containing several hazard curves for PGA in a newly created 'curves' directory. In this example, the calculation configuration was derived from the model directory. Note that not all calculation [configuration](https://github.com/usgs/nshmp-haz/wiki/Configuration) parameters need be supplied; see the [configuration file](../peer/models/Set1-Case1/config.json) for this example model.
The result of this calculation should be available as a single comma-delimited file containing several hazard curves for PGA in a newly created 'curves' directory. In this example, the calculation configuration was derived from the model directory. Note that not all calculation [configuration](https://github.com/usgs/nshmp-haz/wiki/Configuration) parameters need be supplied; see the [configuration file](../../peer/models/Set1-Case1/config.json) for this example model.
Also note that when only a model is supplied to the HazardCalc program, all output is written to the current working directory. In the next example, we'll override the model supplied configuration with a custom file.
In this example we've overridden the configuration supplied by the model. Specifically:
* The upper end of each hazard curve has been truncated at 3 standard deviations.
* Hazard curves have been calculated for 3 `imts` (intensity measure types, or spectral periods) and written to the [2-custom-config]() directory.
* The `imls` (the intensity measure levels or x-values) of the resultant curves have been explicitely defined for each `imt`.
* Hazard curves have been calculated for 3 `imts` (intensity measure types, or spectral periods) and written to the directory containing the config file.
* The `imls` (intensity measure levels or x-values) of the resultant curves have been explicitely defined for each `imt`.
* And two different sites have been specified.
**A note on output:** Because we supplied a specific configuration file, all program output will be written to the directory where the config resides, thus keeping a record of calculation settings along with any results.
alias hazard='java -cp /path/to/repo/nshmp-haz/dist/nshmp-haz.jar org.opensha2.programs.HazardCalc'
```
2.**Note:** All HazardCalc output is written to the current directory from which the program was called.
Because each example builds on prior concepts, it is best step through all the examples, however quickly.
#### Calculating hazard maps
Hazard maps are generated from numerous uniformely spaced hazard curves. To compute such a curve set, the same program is used, but sites are instead specified as a region.
