Simulation Configuration

Options for Simulation Configuration

This is a list of all the attributes that can be defined in different sections of the simulation configuration.

Execution

The simulation is executed in parallel if multiple processors are available. Sometimes it's handy to switch to a sequential execution to evade problems with locks or synchronization.

Therefore use in top level config option execution the maxProcessCount property and set it to 1.

{
  "execution": {
    "maxProcessCount": 1
  },
  "globals": {
      // ...
  }
}

Globals

The globals options define general settings for the simulation like everything around the simulation time.

Property	Type	Default	Required	Constraints	Excludes
id	String	model_name + _ + timestamp	☑	No special characters
steps	Integer	1	☐	value ≥ 0	startTime; endTime
startTime	DateTime	now	☐	value > endTime	steps
endTime	DateTime	null	☐	value > startTime	steps
deltaT	Integer	1	☑	value > 0
deltaTUnit	TimeUnit	seconds	☐	one of: milliseconds, seconds, minutes, hours, days, months, years

Here is an example:

{
  "globals": {
    "startTime": "2020-01-01T00:00:00",
    "endTime": "2020-01-01T01:00:00",
    "deltaT": 1,
    "deltaTUnit": "seconds",
	"console": true,
    "output": "csv",
    "options": {
      "delimiter": ";",
      "numberFormat": "F2"
    }
  }
}

startTime: the start time of the simulation

endTime: the end time of the simulation

deltaT: the length of a single time step

deltaTUnit: the unit of a single time step

console: if true, the simulation progress is displayed in the terminal

output: the medium into which simulation output data is stored

​ Note: if output is set to csv, then the key options can be used to define further details such as the delimiter and the numberFormat.

---

Output

Property	Type	Default	Required	Constraints
output	OutputOption	none	☐	one of: none, CSV, MongoDB, redis, postgresql, sqlite

---

Output (mongoOptions, npgSqlOptions, redisOptions)

Property	Type	Default	Required	Constraints
port	Integer	db specific	☐	value > 0
host	String	localhost	☑
user	String		☑
password	String		☑
connectionTimeout	Integer	5	☐	value > 0
databaseName	String	$sim-config-id	☑

---

Output (sqLiteOptions)

Property	Type	Default	Required	Constraints
databaseName	String	$sim-config-id	☑
isInMemory	Boolean	false	☐

---

Output (socketOptions) exclude?

Property	Type	Default	Required	Constraints
socketPath	String		☑
sendingInterval	Integer	0	☐

---

Output (csvOptions)

Property	Type	Default	Required	Constraints	Notes
delimiter	Delimiter	,	☑	one of: ,, ;, \t, \w
includeHeader	Boolean	true	☐
encoding	String	UTF-8	☐
chunkSize	Integer		☐		exclude
appendConfigName	Boolean	true	☐
fileSuffix	String		☐	overwrites appendConfigName
numberFormat	String	g	☐		exclude
culture	String	en-EN	☐

---

Layer

Property	Type	Default	Required	Constraints
name	String	classname in AST	☑
file	Path		☑	path exists
output	OutputOption	none	☐
outputFrequency	Integer	1	☐	value ≥ 0

The layer section includes a list of configurations for each layer type defined in the model. Here is an example of the configuration for two layers:

{
  "layers": [
    {
      "name": "TrafficLightLayer",
      "file": "res/traffic_lights/traffic_lights_harburg_zentrum.zip"
    },
    {
      "name": "CitizenLayer",
      "file": "res/networks/harburg_zentrum_walk_graph.geojson",
      "mapping": [
        {
          "parameter": "ParkingOccupancy",
          "value": 0.779
        }
      ]
    }
  ]
}

name: the name of the layer type. Note: this must match the layer type's name in the model.

file: the path to a file with geodata that is used to populate the layer.

mapping: a list of additional mappings for the layer.

Raster Layer

Property	Type	Default	Required	Constraints
file	Path		☐	allowed file types: asc, csv, zip
output	LayerOutputOption	asc	☐	options: asc, csv, none

info

(Optional)
** Spatio-Temporal-Layer**

• Set von Dateien auswählen
• Ordnung der Dateien bestimmen
• Dateien mit Zeitangaben versehen

Empty Layer

• Bounding Box angeben (lower left, upper right)
• No Data Value mit bspw. -99

Vector Layer

Property	Type	Default	Required	Constraints
file	Path		☐	allowed file types: geoJSON, ESRI Shapefile
output	VectorLayerOutputOptions	asc	☐	options: asc, geoJSON, ESRI Shapefile, none

Agents

Property	Type	Default	Required	Constraints	Excludes
name	String	classname provided by AST	☑	agent must exist in model
frequency	Integer	1	☐	value > 0
file	Path		☐	path exists	count
output	OutputOption	Global Output Value	☐
outputFrequency	Integer	1	☐	value ≥ 0
outputFilter	FilterList		☐
count	Integer	0	☐	value ≥ 0
mapping	Mapping		☑	external variables must be mapped

The Agents section includes a configuration (an AgentMapping) for each agent type defined in the model. Here is an example:

{
  "agents": [
    {
      "name": "Citizen",
      "count": 10,
      "file": "res/agent_inits/CitizenInit10k.csv",
      "options": {
        "delimiter": ";"
      },
      "mapping": [
        {
          "parameter" : "CanCycle",
          "value" : true
        },
        {
          "parameter": "resultTrajectory",
          "value": true
        }
      ]
    }
  ]
}

name: the name of the agent type. Note: this must match the agent type's name in the model.

count: the number of agents of this agent type that should be spawned at the beginning of the simulation

file: the path to a csv file that contains a set of attributes and attribute values to parametrize the agents

​ Note: if a file is specified, the key options can be used to define further details such as the delimiter.

mapping: a list of additional mappings for the agents.

Mapping

Property	Type	Default	Required	Constraints	Excludes
parameter	String		☑	must exist in agent definition and be marked as external
value	Any		☐	must be type of external parameter	field
field	String		☐	allowed if input file is specified; must exist in .csv	value
type	PrimitiveTypes	read from AST	☑

{
  "mapping": [
    {
      "parameter": "Energy",
      "value": 100,
      "field": "field.name"
    }
  ]
}