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Tangible GIS for Real-time Interactive Landscape Modeling

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Tangible GIS for Real-time Interactive Landscape Modeling Powered By Docstoc
					   Tangible GIS for Real-time
Interactive Landscape Modeling
                 Helena Mitasova,
    Marine, Earth and Atmospheric Sciences,
         North Carolina State University
   Lubos Mitas, Department of Physics, NCSU
    Russell S. Harmon, Army Research Office
   Carlo Ratti, SENSEableCity Laboratory, MIT




                                                GRASS GIS
            Topographic change
Elevation surface has been traditionally
considered static for short time scales (days-years)

Short term topographic change:
Natural forces: storms in coastal areas,
floods, landslides, gully and stream bank erosion
Anthropogenic: construction, agriculture, military

New technologies are being developed
to monitor terrain change and incorporate it into
modeling and decision making
Anthropogenic terrain change
  Construction:
  reduced slopes,
  impermeable
  areas added




Designed in CAD,
represented by
overlayed set of contours:
difficult to work with
            Preserve water flow pattern
                    discharge                                 School built,
                    m3/s
                                                              wetland and
                                                              checkdams added
                                                              for stormwater
                                                              control




GRASS GIS                       Open Source Geospatial Foundation
            Maintain runoff
            current                                     construction
            49% forest                                  24% forest




                    discharge
                    m3/s




GRASS GIS                 Open Source Geospatial Foundation
               Background

New technologies are combining easy to interpret
3d physical models of landscape with geospatial
data to facilitate communication and collaboration
Current commercial options
 GIS2MAP3D
                 XenoVision Mark III
                   TerrainTableTM
             includes TouchTable capabilities
Dynamic physical 3D models
Combine easy to interpret 3d
physical models of
landscape with
geospatial data to facilitate
communication and
collaboration

http://www.xenotran.com/
xenovision_clips.html


       XenoVision Mark III
Northrop Grunman TerrainTable TM
   includes TouchTable capabilities
                Motivation
In one-way systems re-designing terrain
or its features is complex, mouse and GUI task
Mouse+GUI: we need to make a connection
between our hand and the image on the screen
New technologies: Touch tables
IEEECG&A
Sept/Oct 2006
Interacting with digital
tabletops

Interactive access to
geospatial information

2D representation

Face-to-face
collaboration

Limited design
capabilities
     Illuminated Clay: 3D interaction



                                            developed by MIT Media Lab
                                              and SENSEable City lab




 Combines virtual representation with solid model and 2D
 images, re-computes and displays terrain parameters in near-real-
 time
Traditional GIS: design with mouse+GUI: need to make a connection
between hand and the image on the screen
Illuminated Clay: hand and eye works with the same object (physical
model) freeing the brain for more creative thinking
GRASS GIS                      Open Source Geospatial Foundation
     Illuminated Clay: 3D interaction



                                            developed by MIT Media Lab
                                              and SENSEable City lab




 Combines virtual representation with solid model and 2D
 images, re-computes and displays terrain parameters in near-real-
 time
Traditional GIS: design with mouse+GUI: need to make a connection
between hand and the image on the screen
Illuminated Clay: hand and eye works with the same object (physical
model) freeing the brain for more creative thinking
GRASS GIS                      Open Source Geospatial Foundation
       Two-way coupling with GIS
                       asynchronous
                        projector     color: attributes
      GIS/IC
  project with delay   3D scanner     surface: elevation
compute DEM        scan and stop       modify by hand
and its parameters

           synchronous- real-time response
                        projector     color: attributes
      GIS/IC
  continuous loop      3D scanner     surface: elevation
compute DEM and      scan              modify by hand
parameters instantly continuously
                     Test study
 explore how TanGIS can be used to solve real-world problems
 common at communities and installations

 investigate what new development is needed to make the
 practical applications feasible




20 ha area at NCSU exp. farms: sediment and flood control
 GRASS GIS                      Open Source Geospatial Foundation
     Analysis using a physical model
                                                               Data
           Flow computed by Illuminated Clay in
                  synchronous mode


   Aspect
                                                              Physical Model
   Slope

                 Shadow

                 Elevation


                                                              Scanned phys. model

Slope and flow
computed in
GRASS in
asynchronous
mode
  GRASS GIS                             Open Source Geospatial Foundation
              Design with TanGIS
adding a checkdam,
creating a depression,
while watching the flow
and slope to change




                                       simulated overland flow
                                       depth for modified surface


 GRASS GIS                Open Source Geospatial Foundation
              Design with TanGIS
adding a checkdam,
creating a depression,
while watching the flow
and slope to change




                                       simulated overland flow
                                       depth for modified surface


 GRASS GIS                Open Source Geospatial Foundation
     Building TanGIS at VISSTA lab
                                              VIVID 910
                                              laser scanner
                                              1 scan/ 0.3sec
                                              real-time
                                              interaction
                                              higher accuracy
                                              than needed

                                              IR sensors
                                              cheaper, smaller
                                              need to be tested



                                              Multipurpose
                                              facility at
                                              VISSTA Lab at
                                              ECE NCSU:
                                              Prof. Hamid Karim
GRASS GIS         Open Source Geospatial Foundation
        Real-world and model DEMs
  photogr.-based   scanned model-based 1mm (2m) DEMs
   2m DEM 1993           with various modifications




    lidar-based
   2m DEM 2001




GRASS GIS           Open Source Geospatial Foundation
          Exploring runoff with TanGIS

Simulating flow
over modified surface:

testing algorithms
exploring impacts




                                                                     50cm


                                                             braided flow



                               Water depth 60cm
                                                                            30cm

    Smoothed real-world data               modified models
                  Future TanGIS
    Computer                               Physical model



         GIS            projector                   color:
   Real-time data                                   attributes
        from           3D scanner
 Terrestrial sensors
                                                      surface:
   and satellites
                                                      elevation
                       3D shaper




    Desktop or large collaborative systems

GRASS GIS                  Open Source Geospatial Foundation
         Acknowledgment

   This project has been supported by
       US Army Research Office,
 NC WRRI and North Carolina Sediment
          Control Commission

  We also thank Bill Goran, USACERL for
valuable discussions and ideas on geospatial
    research for sustainable development




                                               orolin.blog.sme.sk
              Geospatial Design
  Multidisciplinary team – stakeholders and experts - holds
  charrette – intensive workshop - to set goals, assess and
  modify the proposed project to achieve high sustainability
  expressed by LEED rating.

                                     Traditional approach:
                                     maps and slides

                                     Limited
                                     - log from discussion
                                     - access to info
                                     - feedback on impact of
                                     proposed modification

                                     Advantage
                                     face to face,10+ people
GRASS GIS                    Open Source Geospatial Foundation
          Future needs
  for technology development
      - innovative materials and methods
for creating computer and manually controlled,
                physical models

    - materials and image processing
methods for real-time interaction with surface
                  properties
    Future needs for basic
     and applied research
  - at what scales and for what type of tasks are
    tangible physical models applicable, do we
need “zoomable” physical models (already feasible
              with pin-based systems);

    - what is the optimal approach for integration
of GIS and physical model data (accuracy, automated
    adjustment and/or optimization of design, ...)

- what algorithms are needed for effective, real-time
  coupling with dynamic models and real-time data

				
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posted:4/23/2012
language:English
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