INTERNATIONAL INSTITUTE FOR GEO-INFORMATION SCIENCE AND EARTH OBSERVATION Participatory use of GIS from sketch maps to GIS maps Jeroen Verplanke

Introduction  Sketch mapping: usefulness of PGIS  Boundary mapping with PGIS  About using GPS and PDA in practice  Training experiences with mobile GIS

Satellite imagery cannot be the only data source  Good for distinguishing large scale dynamics  Social-cultural factors cannot be distinguished  Depending on local knowledge and on-site observations  Good for distinguishing large scale dynamics  Social-cultural factors cannot be distinguished  Depending on local knowledge and on-site observations

Making sketch maps

A process of many hours…

Children´s Map of Beacon Park

Mental Maps – Los Angeles white elite, black, hispanic

Rosario, Argentina

Result Perceptions of distance and importance

Visualization strategies  Maps as final products  a means of visual communication  Maps as intermediate products  an aid to visual thinking

Visualization strategies  What is the purpose of the map ?  Who will read the map ?  Where will the map be used ?  What data are available to compose the map ?  ….. ?

Transects  Data collection  Sampling  Local guides  PDA

Recording Boundary mapping GPS coordinates Need local knowledge

Reality vs. perception A1 A2 B1B2

Bostonian´s Image

New Yorker´s Image of the USA

Resources and boundaries

Boundary data inserted as layer

Other activities and observations  Recording anomalies  Observe to understand  Triangulation

Impact assessment

Evaluating observations

Participation to:  Identify problems  Prioritise needs / establish demand  Assess resources  Design alternatives & strategies  Implement plans  Monitor & evaluate

Obstacles to participation  “high-level” resistance  Local power balance  Multiplicity of local interests  Including women  Including (ethnic) minorities  Effort vs. result  Time  Cost