A Basic Introduction to Free and Open Source Software. Presented by John Bocan. Misnomers and misunderstandings Is it just like the other “free” software and shareware? Will it run under Windows? Do I have to learn Linux? Is there a GUI? Will I need to use only the command line?
“Free software is a matter of the users' freedom to run, copy, distribute, study, change and improve the software. More precisely, it means that the program's users have the four essential freedoms:
●The freedom to run the program, for any purpose (freedom 0).
● The freedom to study how the program works, and change it to make it do what you wish (freedom 1). Access to the source code is a precondition for this.
● The freedom to redistribute copies so you can help your neighbor (freedom 2).
● The freedom to distribute copies of your modified versions to others (freedom 3). By doing this you can give the whole community a chance to benefit from your changes. Access to the source code is a precondition for this.”
- from the Free Software Definition http://www.gnu.org/philosophy/free-sw.html
10 criteria for being “Open Source”
From the Open Source Definition http://www.opensource.org/docs/osd
Table 1. Differences between FOSS licenses (modified after Perens 1999).
- From: Steiniger and Bocher, “An Overview on Current Free and Open Source Desktop GIS Developments”
Steiniger and Bocher, “An Overview on Current Free and Open Source Desktop GIS Developments”
e.g., OpenGeo Suite Community or Enterprise Editions
(e.g., shapefile, tiff, jpeg, png, dem)? mrSid?
e.g., Refractions Research
WMS, WFS, metadata
An Overview on Current Free and Open Source Desktop GIS Developments
OpenGeo Community-Edition: http://opengeo.org/community/suite/
The State of Open Source GIS – Paul Ramsey
Free Geography Tools: http://freegeographytools.com/
Listing of Open Source GIS : http://www.opensourcegis.org/
(tries to give licensing info)
Overview of Free and Open Source Desktop GIS (charts):
Open Geospatial Consortium, Inc (OGC) is a non-profit, international, voluntary consensus standards organization that is leading the development of standards for geospatial and location based services.
John Bocan bocan @ geosrv.wvnet.edu