02-28-2007msim 842 visualization ii instructor: jessica r. crouch 1 interactive chesapeake bay...

02-28-2007 MSIM 842 VISUALIZATION II INSTRUCTOR: JESSICA R. CROUCH

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Interactive Chesapeake Bay Simulation

Jessica R. CrouchYuzhong ShenJay A. AustinMichael S.Dinnman

Authors:

Hector M. GarciaPresented By:


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Problem

Scientific grade numerical models play a significant role in oceanographic research.

Numerical models represent ideal teaching tool but out of reach as such.

Create visualization tool that combines

ease of use + full numerical model


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Motivation

To make numerical models a teaching tool accessible in the classroom.

Students to engage in active learning by using the models themselves.

Computer simulations with manipulable models can foster inquiry based learning.


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Relevance

Numerical models enable forecasting and the ability to perform virtual experiments impossible to perform in reality.

Provide the ability to simulate complex system behaviors


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Relevance (cont’d…)

Observed from TOPEX/ERS (left) and simulated by ROMS (right) mean sea level anomaly for the period November 1997 to February 1998.


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Relevance (cont’d…)

Storm surge forcasting can help prepare for disastrous flooding


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Methods

3 functional units for simulation GUI

Fast Light Toolkit (open source GUI toolkit) Numerical ocean circulation model

iRoms (open source numerical model) Visualization routines

OpenSceneGraph (open source visualization toolkit)


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Methods (cont’d…)


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Graphical User Interface


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iROMS

iROMS is a modified version of ROMS compiled into a linkable library.

Main change was to remove the outermost time-stepping loop

New top level functions


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iROMS (cont’d…)

50 x 20 curvilinear masked grid 10 vertical levels User controls wind field, freshwater

flux and update frequency User chooses to display salinity,

velocity, height, floats at the multiple levels.


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Advantages of num. models

Modify model for other geographical domains

Add other submodels (biology, chemistry, etc…)

Large Scientific comunity


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Vizualization Routines

OpenSceneGraph Water Height Salinity Velocity Particle Tracing


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OpenSceneGraph


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Evaluation

Model runs at interactive rates on PC hardware

Used for workshops with highschool students

Is being activeley used by researchers as a teaching tool.


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Evaluation (cont’d…)

Lets take a test drive !


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Conclusion

Authors successfully package a fully functional small numerical model that is easy to use through a GUI at interactive speeds on a PC.

Better than interactive visualization of stored simulation data


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Conclusion (cont’d…)

Plans to do formal evaluation of the program’s educational utility

Future developments efforts in 2 directions: Port for other geographical domains Expansion of ROMS features


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Questions

Is the CHIMP development only useful for educational purposes, or could it be used in other domains ?


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Questions (cont’d…)

Can future developments of CHIMP benefit from a 3D visualization implementation?


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Questions (cont’d…)

LOD is usually applied to geometry detail only, but the basic concept can be generalized. How can this concept be used for future developments of CHIMP?

02-28-2007msim 842 visualization ii instructor: jessica r. crouch 1 interactive chesapeake bay...

Documents

numerical modelmsim

manipulable models

level functions msim

ideal teaching tool

teaching tool accessible

interactive rates

interactive speeds

modelsmodify model