introduction to foss gis

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Open Source & Web GIS 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 [email protected]

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Open Source& Web GIS

Mifan CareemCTO - RespereDirector, GIS Lead - Sahana ProjectCo-author: Book on Maps for AdvocacyGIS Consultant, SAGE - ICTA Committer – Mapbender ProjectMember – OSGEOVisting Lecturer – University of [email protected]

© http://respere.com/

Contents

● GIS● Open Source● Open Source GIS● OS GIS Stack● Web Mapping● Desktop GIS● Applications

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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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Why a GIS?

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A great tool for visualization!

A map speaks a thousand words!

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Advocacy

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Analysis & Reports

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What is Open Source

● Freedom to allow others to adopt and reuse while retaining rights over the code

● Community-driven software● Loads of documentation● Commercial support?

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Open Source GIS

● 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

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A GIS Revolution!

Open Source GIS + Open Standards Data + Freely Available Community Data + GIS Services

+ INTERNET = A GIS REVOLUTION

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FOSS4G:Free and Open

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

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OS GIS Stack

Foundation Libraries

Desktop Web Services

Data Storage and Access

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Foundation Libraries

● Provide low level GIS capabilities:– Read and write different data formats

– Coordinate transformation capabilities

– Data transformation capabilities

– Geometry handling and computation

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Data Storage

● Move data from physical media to application– File based e.g. GDAL/OGR

– Database hosted e.g. PostGIS, SpatialLite

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Desktop

● Traditional Desktop GIS Applications● Quantum GIS● uDig● GRASS● SAGA● gvSIG

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Web Mapping

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Web Mapping

● Google maps, Yahoo maps, MS Live, Multimap

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Web mashups

● Situational Awareness...

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Web Mapping Clients

● Google Earth● Blue Marble - NASA

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USHMM

● United States Holocaust Memorial Museums's Crisis in Darfur

● Google Earth video

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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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© http://respere.com/

© http://respere.com/

Satellite Images

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Open Data

● Collaborative Mapping Projects– OpenStreetMaps, OpenCycleMap

● Humanitarian Volunteer Effort– Haiti Response

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OSM vs GM

Kabul, Afghanistan

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OSM vs GM

Tblisi, Georgia

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Desktop GIS

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Desktop GIS

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© http://respere.com/

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OGC

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Sahana-GIS

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Sahana GIS ...

QGIS

Sahana[UMN/Mapserver]

UMN/Mapserver

GeoServer

ESRI Server

uDIG

Sahana-OpenLayers

WMSWFS

GeoRSS

Local / Remote

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Business Intelligence

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Spatial Intelligence

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Proprietary vs. Open Source

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THE END