Strata

A Stratum in ST-Sim refers to a subset of the entire landscape being considered for analysis. Strata are typically used to divide the overall landscape into regions, each of which can have different model parameters.

Primary Strata

Datasheet internal name: stsim_Stratum

Primary Strata typically represent a biophysical or ecological stratification of the landscape.

Column Options

The fields for the Strata property are:

Display Name	Internal Name	Optional	Data Type	Description
Name	Name	No	String	The name of the Primary Stratum.
Id	Id	Yes	Integer	The Primary Stratum ID.
Color	Color	Yes	String	The legend color for the Primary Stratum when displaying Spatial Maps. Double click in a cell to open the color editor and choose a color.
Map Legend	Legend	Yes	String	The map legend for the Primary Stratum when displaying Spatial Maps.
Description	Description	Yes	String	A description of the Primary Stratum.

Secondary Strata

Datasheet internal name: stsim_SecondaryStratum

Secondary Strata typically represent a management stratification of the landscape such as ownership or jurisdictional boundaries.

Column Options

The fields for the Secondary Strata property are:

Display Name	Internal Name	Optional	Data Type	Description
Name	Name	No	String	The name of the Secondary Stratum.
Id	Id	Yes	Integer	The Secondary Stratum ID.
Description	Description	Yes	String	A description of the Secondary Stratum.

Tertiary Strata

Datasheet internal name: stsim_TertiaryStratum

Tertiary Strata are used to represent any additional landscape region required by the model.

Column Options

The fields for the Tertiary Strata property are:

Display Name	Internal Name	Optional	Data Type	Description
Name	Name	No	String	The name of the Tertiary Stratum.
Id	Id	Yes	Integer	The Tertiary Stratum ID.
Description	Description	Yes	String	A description of the Tertiary Stratum.

Note

Strata are completely flexible; they can be used to represent any kind of landscape region. Primary Strata can change during a simulation, but secondary and tertiary Strata are fixed for the entire simulation.

Additional Options

At a minimum, each Stratum must have a Name. However, the following additional columns are available from the Context Menu.

Item	Description
ID	The ID for the Stratum when running a spatially explicit simulation.
Color	The legend color for the Stratum when displaying Spatial Maps. Double click in a cell to open the color editor and choose a color.
Map Legend	The map legend for the Stratum when displaying Spatial Maps.
Description	A description of the Stratum.

Remarks

For spatial simulations, ID values for a Stratum are required and must correspond to the ID values for the Stratum raster defined in the Spatial Initial Conditions Property.

Summary Table

Display Name	Internal Name
Primary Stratum	stsim_Stratum
Secondary Stratum	stsim_SecondaryStratum
Tertiary Stratum	stsim_TertiaryStratum