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Introduction to FOSS GIS
This document provides an overview of open source GIS. It discusses what GIS is and why it is useful, particularly for advocacy and analysis. Open source GIS is described as using open standards to allow data sharing while retaining rights over shared code. The open source GIS stack is made up of foundation libraries, data storage, desktop applications, and web mapping. Popular open source desktop GIS software includes QGIS, uDig, and GRASS. Web mapping has evolved from early proprietary tools to include open source mapping clients and platforms like Ushahidi that allow crisis mapping. Open data sources like OpenStreetMap are also discussed.
Introduction to FOSS GIS
- 1. Open Source & WebGIS Mifan Careem CTO - Respere Director, GIS Lead - Sahana Project Co-author: Book on Maps for Advocacy GIS Consultant, SAGE - ICTA Committer – Mapbender Project Member – OSGEO Visting Lecturer – University of Moratuwa mifan@respere.com
- 2. © http://respere.com/ Contents ● GIS ●Open Source ● Open Source GIS ● OS GIS Stack ● Web Mapping ● Desktop GIS ● Applications
- 3. © http://respere.com/ GIS what? ●Geographical Information System ● A geographic information system (GIS) captures, stores, analyzes, manages, and presents data that is linked to a location.
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- 5. © http://respere.com/ A greattool for visualization! A map speaks a thousand words!
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- 8. © http://respere.com/ What isOpen Source ● Freedom to allow others to adopt and reuse while retaining rights over the code ● Community-driven software ● Loads of documentation ● Commercial support?
- 9. © http://respere.com/ Open SourceGIS ● GIS Software that allows us to share our data with everyone using Open Standards ● Software that we can modify and use ● GIS updated and enriched by community participation ● GIS data released an open license ?? ● GIS updated and enriched by community participation
- 10. © http://respere.com/ A GISRevolution! Open Source GIS + Open Standards Data + Freely Available Community Data + GIS Services + INTERNET = A GIS REVOLUTION
- 11. © http://respere.com/ FOSS4G: Free andOpen Source Software for Geospatial OSGEO: The Open Source Geospatial Foundation All of the products we'll talk about today are both free and open-source
- 12. © http://respere.com/ OS GISStack Foundation Libraries Desktop Web Services Data Storage and Access
- 13. © http://respere.com/ Foundation Libraries ●Provide low level GIS capabilities: – Read and write different data formats – Coordinate transformation capabilities – Data transformation capabilities – Geometry handling and computation
- 14. © http://respere.com/ Data Storage ●Move data from physical media to application – File based e.g. GDAL/OGR – Database hosted e.g. PostGIS, SpatialLite
- 15. © http://respere.com/ Desktop ● TraditionalDesktop GIS Applications ● Quantum GIS ● uDig ● GRASS ● SAGA ● gvSIG
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- 17. © http://respere.com/ Web Mapping ●Google maps, Yahoo maps, MS Live, Multimap
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- 19. © http://respere.com/ Web mashups ●Situational Awareness...
- 20. © http://respere.com/ Web MappingClients ● Google Earth ● Blue Marble - NASA
- 21. © http://respere.com/ USHMM ● UnitedStates Holocaust Memorial Museums's Crisis in Darfur ● Google Earth video
- 22. © http://respere.com/ Ushahidi ● http://www.ushahidi.com/ ●The Ushahidi Engine is a platform that allows anyone to gather distributed data via SMS, email or web and visualize it on a map or timeline.
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- 26. © http://respere.com/ Open Data ●Collaborative Mapping Projects – OpenStreetMaps, OpenCycleMap ● Humanitarian Volunteer Effort – Haiti Response
- 27. © http://respere.com/ OSM vsGM Kabul, Afghanistan
- 28. © http://respere.com/ OSM vsGM Tblisi, Georgia
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- 36. © http://respere.com/ Sahana GIS... QGIS Sahana [UMN/Mapserver] UMN/Mapserver GeoServer ESRI Server uDIG Sahana-OpenLayers WMS WFS GeoRSS Local / Remote
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- 39. © http://respere.com/ Proprietary vs.Open Source
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