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Participatory GIS in Empowering Rural Communities:Development and Field Trials
3rd International Open Source GIS ConferenceVelp, The Netherlands
June 25-28, 2012
Nagesh Kolagani, Dr. Palaniappan Ramu and Dr. Koshy VargheseIndian Institute of Technology Madras, Chennai 600036 INDIA
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Google Map of Reservoir and Farms
Does not know their descriptive data; Does not show other needed features (e.g. wells)
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Village Youth gathering such Data using GPS & Questionnaires
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For point layers:(such as wells)
As GPS 'way points'
For line and polygon layers:(such as streams and farms)
As GPS tracks:Can not deviate from boundaryDifficult for streams, farms, etc due to presence of thorny bushes, etc.OK for roads, etc.
As GPS routes:User interface is difficult for use by a villager
As GPS 'way points':To be joined later using GIS
Collecting Spatial Data as GPS Waypoints
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A Sample Questionnaire for Farms Layer
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School Children Producing GIS Maps from Such Data
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villageQGIS: Auto-connecting GPS points
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Entering Questionnaire Data into Appropriate GIS layer
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Using villageQGIS software: (e.g. 3 clicks)For each feature of each layer (of type line or polygon):
Constructing lines and polygons from GPS point data:- specify way points to join as a string e.g. “209-213, 218, 221-224”- visually verify correctness of boundary points & joined line/polygonConverting lines and polygons into GIS features:- select layer name from a list box e.g. “streams” or “farms”- fill resulting attribute form with data from questionnaire
Using QGIS software: (e.g. at least 17 clicks)For each feature of each layer (of type line or polygon):
- Select desired feature and select option to add new a feature- For each GPS point: (e.g. 209,210,211,212,213,218,221,222,224”)
- locate it on the screen, using find button or appropriate label option- draw a line connecting it to previous point
- fill resulting attribute form with data from questionnaire- Save
Comparison of villageQGIS and QGIS
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A Sample Village Map
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Tutorial
Input data:GPS and Questionnaire data about:
- a stream and a reservoir- farms under that reservoir, etc
Task:Create a GIS map:
- first using villageQGIS- then using QGIS (or Map Windows GIS)
Compare the time taken and map accuracy
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...
Querying Attributes of Mapped Features
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Easy Interface to View Complex Data in Simple Ways
This will help villagers understand their problems & solutions and participate better
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Default Views: Farms Classified based on Social Data
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Multi-Criteria Classification e.g. Technical & Social Data
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Interface for Local Experts to Build Custom Views
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Experiments on Ease-of-Use in Map Preparation
● Participants:
6 sub-groups of 3 village students each
● 3 sub-groups use Quantum GIS software (Control group)
● 3 sub-groups use villageQGIS software (Test group)
● Task:
Produce GIS maps from given GPS and Questionnaire data sets
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Experiments on Ease-of-Use in Map Preparation
1 2 30
0.5
1
1.5
2
2.5
3QGISvillageQGIS
Ratio of times taken (with QGIS and
with villageQGIS)
Experiment no.
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Experiments on Ease-of-Use in Map Preparation
1 2 30
0.5
1
1.5
2
2.5
3QGISvillageQGIS
Ratio of times taken (with QGIS and
with villageQGIS)
Experiment no.
Desired spatial
accuracy