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Policy ModelsPolicy Models

“A model should clarify the issues in the debate; it must be able to enforce a discipline of analysis and discourse among stakeholders; and it must provide an interesting form of “advice,” primarily in the form of what not to do…”

“A model should clarify the issues in the debate; it must be able to enforce a discipline of analysis and discourse among stakeholders; and it must provide an interesting form of “advice,” primarily in the form of what not to do…”

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Model Evaluation CriteriaModel Evaluation Criteria

Model ScaleModel Scale

Spatial - Resolution - Extent

Temporal - Time Step - Duration

Human - Agent - Domain (also time horizons)

Spatial - Resolution - Extent

Temporal - Time Step - Duration

Human - Agent - Domain (also time horizons)

*fine vs. broad scale

Temporal ComplexityTemporal Complexity

More time steps, longer duration Overlapping steps or scales for

different processes Lags and feedbacks

More time steps, longer duration Overlapping steps or scales for

different processes Lags and feedbacks

“…at least one level of actor needs to have an awareness of both short and long time horizons and be able to communicate with other actors operating at shorter time horizons.“

Spatial ComplexitySpatial Complexity

Spatially Representative - incorporate or represent data in two or more spatial dimensions

Spatially Interactive - explicitly defines spatial relationships

Spatially Representative - incorporate or represent data in two or more spatial dimensions

Spatially Interactive - explicitly defines spatial relationships

Human ComplexityHuman Complexity

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Discussion - ComplexityDiscussion - Complexity

Figures 5, 6, & 7

comparison of scale and complexity

raster vs. vector

human decision complexity

Figures 5, 6, & 7

comparison of scale and complexity

raster vs. vector

human decision complexity

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Discussion - theoryDiscussion - theory

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Synchrony, Asynchrony & Scale Mismatch

Synchrony, Asynchrony & Scale Mismatch

Discussion - MethodsDiscussion - Methods

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Discussion - MethodsDiscussion - Methods

Systems approach Multidisciplinary balance Feedbacks Remote Sensing Data GIS data integration / prep Scale - multiscale ???

Systems approach Multidisciplinary balance Feedbacks Remote Sensing Data GIS data integration / prep Scale - multiscale ???

Authors’ PropositionAuthors’ Proposition

Need for accepted framework

Modular, open-source approach

Need for accepted framework

Modular, open-source approach

Discussion Q’sDiscussion Q’s

When is the modularity of a model a hindrance, and when does a modular design excel?

When is the modularity of a model a hindrance, and when does a modular design excel?

given advanced enough image processing and geocoding services, could the model application process be simplified (in some cases) by creating a “state snapshot”?

given advanced enough image processing and geocoding services, could the model application process be simplified (in some cases) by creating a “state snapshot”?

Is the authors’ discussion of scale and multi-scale approaches really pertinent? Couldn’t processes take place at ‘different scales’ in the same continuous Cartesian model space

Is the authors’ discussion of scale and multi-scale approaches really pertinent? Couldn’t processes take place at ‘different scales’ in the same continuous Cartesian model space