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Highway Corridor Routing using the Enhanced Participatory Analytic Minimum Impedance Surface (EP-AMIS) methodology
The team has developed scripts that allowed the SharpeDecisions® output to be fed directly into ArcView GIS. Another script was used to perform a real-time RECLASSIFY operation in ArcView using these weightings. This generated the final weighting for each of the more than 50 input layers. Given a user-specified origin and endpoint the AMIS corridors were then computed using a LEASTCOST-based path algorithm and displayed to meeting participants. The output showed the optimal path, and it displayed the corridor composed of the aggregated lowest-impedance paths across the landscape. This occurred at the same meeting where the input factors were specified and weighted, allowing participants a uniquely rapid, efficient and powerful means of highway corridor evaluation. The standard AMIS operations were available for those who wished to analyze the corridor, including meters of coverage along the specified path for each input element or factor and total impedance weighting along the specified path.
Conclusion
EP-AMIS seeks to advance applied geospatial decision theory by integrating distributed outreach and electronic polling into the logical framework of the AMIS methodology. By delivering a structured sequence of environmental, social and physical geographical valuations, using participatory technologies such as electronic polling, EP-AMIS assists professionals in several key areas.
- Solicits input and specific valuations from populations that would otherwise have no voice in these decisions
- Allows professionals to incorporate these views into the decision-making process in a fair and transparent manner
- Brings together diverse professionals and practitioners through the medium of the GIS.
- Allows professionals and other stakeholders to convert these abstract valuations into a graphical display of preferred routings for display and iterative evaluation
Moreover the EP-AMIS approach is modular and transferable. The case study deals with highway corridor routing, but the core EP-AMIS logic is equally suited to a wide range of spatial decision making applications, including waste facility location; electric transmission line placement; and participatory management of public and semi-public lands such as parks and national cultural resources.
References
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