participatory three-dimensional modelling

7/29/2019 Participatory Three-dimensional Modelling

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Prepared by

Dr. Bheshem Ramlal

Department of Geomatics Engineering and Land ManagementUWI, St. Augustine


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Introduction* P3DM is a relatively new method developed to

support collaborative processes to facilitate grassrootsparticipation in problem analysis and decision-making

P3DM integrates peoples knowledge and geographicinformation to produce relief models that are user-friendly.

These models are relatively accurate data storage andare useful as analysis devices and for communicatinginformation.

* This presentation is based on material obtained from:

http://www.iapad.org/participatory_p3dm.htm


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Overview of Process

1. Preparatory Phase

2. Acquiring P3DMSupplies

3. Assembling the BlankModel

4. Depicting theinformation

5. Transferring theinformation

6. Digital Photography

7. On-screen digitizing

8. GIS Processing

9. Map Production

10. Data Validation11. Hand Over of Model

12. Continued Use by

Community


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Preparatory Phase It is extremely important to have a very good

understanding of the cultural and socio-economicsetting of the area in which the P3DM exercise is to bedone

Need to identify of all stakeholder groups Must secure agreements from them to participate in

the process

Identify venue for exercise

Secure funding to support exercise Compile Legend for Map in collaboration with

stakeholder

Identify supplies needed


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Legend making

All legend itemsneed to be sortedinto: areas

lines

points

toponyms


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Acquiring P3DM Supplies

Items include but notlimited to:

Tables for Model

Cardboard

Base Maps

Strings Various colours

Carbon Paper

Pins Various colours

Thumb tacks Variouscolours

Paint Various colours

Glue

Scissors

Coping Saw

Markers

Nails

Crepe Paper


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Tools for Scaling and referencing


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Assembling the Blank Model


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Depicting the Map Information


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Transferring the information


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Digital Photography

Movem

entofthe

DigitalCamera

3Dm

odel

4 m distance


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Sample Images


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On-screen digitizing


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GIS ProcessingPreparing the Data for Analysis and Map

production purposes:

Single Map coordinate systemSeparating into different layers

Ensuring that all attribute data is added


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Map Production


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Data Validation

Finished Map is verified by informants andother stakeholders in the community

Error and omissions are fixedFinal Map produced


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Hand Over of Model

Finished Model and Maps handed over to theCommunity in a formal handing over ceremony

Provides an opportunity for the press, policy makersand informants to meet and to hold discussions usingthe model as centerpiece for these discussions

The model becomes part of the Community


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Continued Use by Community

Follow up data collection and updates of model needto done on a scheduled basis so that the model issustainably used by the community.

As a result, stakeholders will continue to benefit fromthe P3DM exercise in the long term.


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Concluding Remarks

The 3D modelling process is long but a very simple one

Significant participation and learning takes placeduring the exercise

It is by far the most cost effective method to gainsignificant information for use by communities toinfluence policy makers

This exercise is expected to provide significantopportunity for the people of Tobago

participatory three-dimensional modelling

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