international institute for geo-information science and earth observation participatory use of gis...
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INTERNATIONAL INSTITUTE FOR GEO-INFORMATION SCIENCE AND EARTH OBSERVATION
Participatory use of GIS
Spatial data acquisition
Jeroen Verplanke
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Introduction
Sketch mapping: usefulness of PGIS
Particpatory spatial data acquisition described with a boundary/land use mapping example
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Satellite imagery cannot be the only data sourceSatellite 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
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Making sketch mapsMaking sketch maps
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Result
Perceptions of
distance
and
importance
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Reality vs. perceptionReality vs. perception
A1 B1 A2 B2
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Visualization strategies
Maps as final products a means of visual communication
Maps as intermediate products an aid to visual thinking
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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 ?
….. ?
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Transects
Data collection Sampling
Local guides
PDA
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Recording
Boundary mapping
GPS coordinates
Need local knowledge
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Resources and boundaries
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Boundary data inserted as layer
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Other activities and observations
Recording anomalies Observe to understand Triangulation
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Impact assessment
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Evaluating observationsEvaluating observations