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TELSA DB vs Path DB

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  • #1615
    aregerareger
    Participant

    I am trying to understand how these two databases are intertwine. I linked the two databases in Path once I relized I could. I had already exported the definitions to Telsa. Now that the two dabases know of eachother how do they work together?

    #1775
    leonardo-fridleonardo-frid
    Keymaster

    One of the main objectives in developing Path was to have a single integrated environment for simulating State and Transition Simulation Models either spatially or non spatially. For non-spatial models we have completed this goal but for spatially explicit models we are not quite there (yet). Path now has the ability to run the TELSA C++ model as a spatially explicit simulation engine. We have tried to minimize the amount of interaction between the user and the old TELSA user interface but given resource limitations there is still one step that requires the user to interact with the ArcGIS TELSA spatial tools. This requires that the user works with both a Path and a TELSA Database. Here is a brief description of the relationship between the databases:

    1. Users now define all definitions and non-spatial model rules in Path

    2. At any point in time, users export these definitions to a template TELSA database and use the TELSA Spatial Tools in ArcGIS to import spatial map inputs into this database. This process is generally required only once per landscape.

    3. Once the TELSA template with maps has been created the user can store this database and point to it in Path.

    4. Whenever a scenario is run from Path as a spatially explicit model, Path creates a copy of the TELSA template database adds additional inputs specific to that scenario and calls the TELSA.exe C++ simulation engine to run that scenario. The non spatial outputs of the simulation are imported automatically to the Path database. The spatial outputs are stored in the copied TELSA database. By default the TELSA “run” database is stored in My Path Files | Scenario.

    5. Because spatially explicit outputs are stored in the copied TELSA database, users interact with this database through the ArcGIS TELSA spatial tools in order to view maps of output.

    #1776
    aregerareger
    Participant

    Thank you. A related queston. I am prerparing to import Planning Zones into Telsa so I thought I would check on the Regions used in the model I inherited. There are no Regions nor a place to put Regions. How does that work? I want to model the whole landscape and adjust my transitions according to the Planning Zone.

    It just seems that the Telsa database will have more data including the additional parameters beneficial to modelly spatially.

    #1777
    leonardo-fridleonardo-frid
    Keymaster

    You are right that there are no planning zones in Path. This means that if you have planning zones you will need to use the stratum feature to define them. Each stratum will consist of the combination of planning zone and the ecological stratification. So for example your ecological stratification might include (1) Ponderosa Pine and (2) Mixed conifer and your planning zones might include (a) National Forest and (b) Private. In Path you would define the 4 strata that represent all possible combinations of these. You would then define a model for each stratum and be able to also specify management targets for each of these. This may seem like an onerous process but remember that in Path it is quite easy to copy an entire model and paste it into another stratum using the transition editor.

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