ARCHAVE ARCHAVE A Three Dimensional GIS For a CAVE Environment Team: Eileen Vote Daniel Acevedo...

ARCHAVEARCHAVE A Three Dimensional

GIS For a CAVE Environment

Team:

Eileen VoteDaniel Acevedo Feliz

Martha Sharp JoukowskyDavid H. Laidlaw

Introduction

The SHAPE Lab was created with a grant from the US National Science Foundation in 1999 to deal with problems in computer vision using archaeological data from the Great Temple Site. It is a multidisciplinary endeavor which involves the departments of Computer Science, Engineering, Applied Math, Old World Archaeology and Art and Anthropology.

The ARCHAVE Project uses VR technology for research in Archaeology.

The system has been in progress since November, 1999 and the first phase of development, which will be presented here is almost complete. We will present a basic 3D model and show it’s functionality in the CAVE virtual environment.

1.- Introduction2.- Motivation3.- Project goals4.- Video5.- Issues6.- Impact

ARCHAVE: A Three Dimensional GIS For A CAVE Environment



Introduction

Brown University excavations at the Great Temple of Petra (Jordan) since 1993.

General issues associated with a large site and data set.

- Great Temple site is the size of a football field.

- 70+ trenches.

Analysis problems:

- Strict statistical associations exclude information.

- The archaeologist has an empirical association with the data and can make conclusions easily from memory. Other users don’t have this extensive knowledge.


Motivation




ArcView with 3D Analyst

Limited data representation

Scale issues

No multivariable representation

Motivation



Immediate Aim: To develop a format of the data and site that is more complete and real to the user (in a year or in fifty+ years) and can be used by anyone who wants to become acquainted with the site.

Hypothesis: A Virtual Reality interface for a GIS or 3D database will allow archaeologists to easily identify and successfully analyze more complex interrelationships from the field-data.

Project Goals



Expectations

1. Better understand the context of the data

2. Gain freedom of movement through the dataset (site, architecture and artifacts)

3. Move away from specific “fixed” format database structures

Eventually, with the system fully developed…

More complex queries with several data types “overlaid” Progress from simple data viewing to interacting with data


Tests

Use different user interfaces to evaluate the success of the system.

Compare classical approach (without system) to navigation and queries:+ Workstation (desktop version)+ Workbench+ HMD (Head Mounted Display)+ CAVE – current testing




Video Demonstration



Operating Issues

VR systems are very expensive

System processing limit constrains detail that can be shown. Current model is 200,000 polygons. Output = 1.6 million polygons per second.

Creating accurate model of site and data requires knowledge of specialized software (AutoCAD, 3D Studio, World Tool Kit)

Navigation and scale issues



3D Visualization Issues

Transcend typical representations of data. Collaboration with Cognitive Science to develop ways of seeing multiple types of data at once and understanding it.

- Not necessary to show strictly literal representations of data

- Possibility to try “painterly” representation of data

- 3D texturing



Methodological Issues

Role of the 3D representations of existing and reconstructed evidence

- How are reconstructed artifacts and architecture represented in the system so that the user differentiates.

- Danger in allowing users to accept a reconstruction without evidence

Visual information has to be recorded correctly, accurately and must be standardized


Impact

Intra and inter-site collaboration. Link sites and systematically compare artifacts.

New Visualization technology can be used in other areas for 3D databases and visualization issues.


ARCHAVE ARCHAVE A Three Dimensional GIS For a CAVE Environment Team: Eileen Vote Daniel Acevedo...

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