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I'm looking to set up a FOSS web GIS to allow sharing of large data files. From online discussions I gather this can be done using a variety of software combinations, eg: PostGIS + MapServer + Open Layers or alternatively PostGIS + QGIS Desktop + QGIS Server + QGIS Client.

Could people experienced in this area please detail any advantages and/ or disadvantages that might be associated with these two options?

Are there any problems setting up either of these two systems on a 64-bit machine?

The end product webGIS would ideally give differential access via username and password, with different selections of data available to different users.

Any advice appreciated.

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