[Qgis-user] GIS big picture for the newbie

[Kevin Goulding]

Hello all,

Is there somewhere that explains, for the newbie, how all the open source
GIS software components fit together?

e.g., QGIS, gdal, postgresSQL, PostGIS, Grass, Django, GeoDjango, Homebrew,
pgRouting, plug-ins, Python, etc.

How many of these applications are redundant or compete with one another?
 What does each application set out to do in relation to the other
applications?

This is directly related to this posted question:
http://gis.stackexchange.com/questions/19157/monte-carlo-simulation-using-qgis-and-pgrouting-on-optimal-sidewalk-construction

Many thanks,
Kevin
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