Presentation on theme: "Enhancing the Vision of CyberGIS Michael F. Goodchild University of California Santa Barbara."— Presentation transcript:
Enhancing the Vision of CyberGIS Michael F. Goodchild University of California Santa Barbara
Three years in How has our vision changed since the proposal? What will be the next phase and how will it be different? Are we measuring success appropriately?
Five areas The problem set Analysis and modeling Broadening the base The science of CyberGIS Education
The story so far CyberGIS –a subset of cyberinfrastructure –specific to geospatial activities The components of CI: –high-performance computing applied to geospatial analysis, modeling because such problems are often compute-intensive –distributed, collaborative systems using geospatial data and tools strong emphasis on visualization –community building
No shortage of large problems Global DEM at 30m resolution –5x10 11 data elements –computing intervisibility Longitudinal change in land cover at 1 hectare resolution –5x10 10 data elements per time sample –20 visits per year (Landsat) for 40 years 4x10 13 data elements Fixes of the entire US vehicle fleet every second
Measuring success What new scientific discoveries could not have been made without CyberGIS? What new problems could not have been solved? What new decisions could not have been made? What new predictions could not have been made? …without x –where x = GIS and t ~ 1990
Traditional approaches Divide and conquer –familiar geospatial analyses can be partitioned geographically intervisibility on 1 degree squares –10 7 data elements one Landsat scene at a time –10 7 data elements tracking of a subset of vehicles in one metropolitan area –10 7 data elements per second Over what set of problems does divide and conquer work? –and is that the complete set?
Elements of a vision (1) In the set of geospatial problems only some are amenable to divide and conquer Because of our reliance on divide and conquer we do not give such problems serious consideration; we are not even able to enumerate such problems CyberGIS invites us to rethink our problem set; CyberGIS will be measured not by the existing problems it solves but by the new problems it makes solvable
What makes divide and conquer acceptable? Short-distance social interactions –geographys distance decay Long-distance interactions are problematic –and increasingly common in a virtual world A world partitioned into places –cities as discrete objects vs population density as a field Short-distance physical interactions –versus long-distance air and water transport
The New Yorker, 12/10/01
July 21, 2008 The Butterfly Effect, Part 2* How 9/11 pissed off the Saudi high rollers, boosted Al Qaeda recruitment,and got us all to put eggplant on our pizza.
Analysis and modeling CyberGIS as integrated functionality –serving an interoperable data environment Interoperable data –self-descriptive embedded metadata –hiding details of implementation projection, datum alternative field representations –user should engage only with those details that affect the science uncertainty
Where are we now? Fragmented, Balkanized tools User must engage with a myriad details –steep learning curve Models not interoperable –not plug-and-play –no common language Even in the limited domain of geospatial analysis and modeling Must each effort to integrate result in another alternative?
Elements of a vision (2) An environment for analysis and modeling Backed by powerful, distributed computation Hiding as many implementation details as possible –a new generation of the GIS user interface –allowing the UI to focus on science The original but much neglected goal of GIS: to integrate knowledge –in a framework of space and time
Broadening the base Who are the users of CyberGIS? –a subset of GIS experts? a subset of the GIS community –the next generation of GIS experts? a redefined GIS community –the next five million users of GIS? –the average citizen? Business as usual? –an inaccessible interface –motivating only the technologically adventurous or those who have a genuine problem to solve?
Elements of a vision (3) A technology that is adopted because the benefits of doing so outweigh the costs of learning how A technology that reaches beyond the GIS community A technology that has something to offer the average citizen
The science of CyberGIS The principles of GIScience –spatial dependence –spatial heterogeneity –extended to spacetime –relative accuracy always better than absolute accuracy –a polyline representation of a curve is always shorter than the curve But what additional principles? –any geographical system can be modeled as a set of semi-independent parallel systems
Partitioning a geographical system Into a set of semi-indepenent parallel systems Should the partitioning be static or dynamic? Can there be a hierarchy of partitions? Can there be multiple overlapping partitions? –social and environmental? Is partitioning the best approach? –or fuzzy partitions? –or proximity to nodes?
Elements of a vision (4) A new science of CyberGIS –with a set of distinct principles –foundations for teaching –still true in 20 years independent of todays technology –CyberGIScience? –a place in the academy –compare GIS in 1990 GIS is just a tool non-intellectual expertise
Education The field of CyberGIS is advancing rapidly –what place does it deserve in the curriculum? Is it just a flash in the technological pan? –or a truly new addition to scientific knowledge? How should we prepare students –for a world of CyberGIS? –for a world in which todays hot new tools are tomorrows cyberjunk?
Can education keep up? Higher education is the second-most conservative industry known to humanity –curriculum advance is slow and perhaps for good reason
Elements of a vision (5) The curriculum needs constant revision –in a field advancing as rapidly as GIS/CyberGIS Textbooks on a 3 to 4 year cycle –courses on a 1-year cycle –BoK? What mechanisms will ensure a continuously evolving curriculum? –and how do we ensure that what is new is worth teaching? –textbooks, teaching materials, online resources, MOOCs, …
Concluding points The vision of CyberGIS has advanced since the original proposal –and needs to advance continuously We need to think about the next phase Many other related activities are under way –among industrial partners –in the open-source community We continue to attract attention from the HPC community
patial_Computing_Report pdf What is the intersection between this report and CyberGIS?