Ease-of-use and Effectiveness of Participatory GIS in Empowering Rural Communities by Nagesh Kolagani
Participatory GIS in Empowering Rural Communities: Development and Field TrialsNagesh Kolagani, Dr. Palaniappan Ramu and Dr. Koshy Varghese Indian Institute of Technology Madras, Chennai 600036 INDIA 3rd International Open Source GIS Conference Velp, The Netherlands June 25-28, 2012
Google Map of Reservoir and FarmsDoes not know their descriptive data; Does not show other needed features (e.g. wells)
Village Youth gathering such Data using GPS & Questionnaires
Collecting Spatial Data as GPS WaypointsFor point layers:(such as wells) As GPS way pointsFor line and polygon layers:(such as streams and farms) As GPS tracks: Can not deviate from boundary Difficult 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
Entering Questionnaire Data into Appropriate GIS layer
Comparison of villageQGIS and QGISUsing 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/polygon Converting 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 questionnaireUsing 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
TutorialInput data:GPS and Questionnaire data about: - a stream and a reservoir - farms under that reservoir, etcTask:Create a GIS map: - first using villageQGIS - then using QGIS (or Map Windows GIS)Compare the time taken and map accuracy
Easy Interface to View Complex Data in Simple WaysThis will help villagers understand their problems & solutions and participate better
Default Views: Farms Classified based on Social Data
Multi-Criteria Classification e.g. Technical & Social Data
Interface for Local Experts to Build Custom Views
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
Experiments on Ease-of-Use in Map Preparation 3 QGIS 2.5 villageQGIS 2Ratio of times taken (with QGIS and 1.5 with villageQGIS) 1 0.5 0 1 2 3 Experiment no.
Experiments on Ease-of-Use in Map Preparation 3 Desired spatial QGIS 2.5 accuracy villageQGIS 2Ratio of times taken (with QGIS and 1.5 with villageQGIS) 1 0.5 0 1 2 3 Experiment no.