GEO 5159 GIS Applications in Environmental Systems Seminar 3: Question, Models, Data, Download, Learning.

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Presentation transcript:

GEO 5159 GIS Applications in Environmental Systems Seminar 3: Question, Models, Data, Download, Learning

Procedure 1.Question/Problem 2.Identify existing models and read the documentation 1.Do they meet requirements of the question? 1.Yes: proceed to No: Prepare to create your own model 2.Are data available to run the model? 1.Yes: proceed to No: can information be modeled? 1.Yes: find models, recursion to No: ??? Continued

Procedure 3.Download the model 4.Download the data 5.Implement the model - preliminary 1.Example data and model runs available? 1.Yes: implement with provided material 2.No: create simplest possible datasets to run model 2.Compile from source code? Must have development environment software (VisualBasic, C, C++, Fortran, Python, etc.) 6.Run test cases on provided or simplest datasets - debug

Procedure 7. Implement the model – Functional 1.Run the model on real data. 2.Compare output with real world 3.Calibrate the model by “tweaking” calibration variables (these are subjective – which are the most uncertain?). 8. Sensitivity analysis 1.Which variables are most important (contribute most to variance in the output)? 2.Vary single variable over some range, collect output.

Procedure 9. Implement the model 2 – Experimental 1.Vary conditions according to scenarios 2.Collect output 3.Analyze in absolute and relative terms 8. Report the results: 1. What are the specifications of the model and its parameters? Repeatable! 2. What are the answers to the questions?

Some Interesting Web Sites Server for Ecological Modeling kassel.de/ecobas.htmlhttp:// kassel.de/ecobas.html Spatial Modeling Environment SERDP Ecological Models and Land-use Decisions dex.html dex.html Everglades Landscape Model 4,1314_ :1314_ &_dad=portal&_schema =PORTAL&navpage=elm2 4,1314_ :1314_ &_dad=portal&_schema =PORTAL&navpage=elm2 Land Transformation Model