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For example, a program I use (TransCAD) has the ability to do travel time matrices based on minimal data input, which is really useful if you're looking at doing back of the envelope type calculations. Another feature it has is the ability to do transit routing and GHG emissions modeling.

What are some of the features you use in non-free/opensource software that you'd like to see implemented in your favorite FOSS GIS software?

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Should be community wiki – fmark Jul 24 '10 at 7:52

Personally I'd very much welcome functionality and ease of use of ArcGIS Network Analyst extension.

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Even with just the ease of use of a python library like NetworkX would be a good start! – fmark Aug 5 '10 at 14:29
@fmark - I don't really understand the theory behind SHP/POSTGIS/GDAL simple geometry; however, it was explained to me that the only way to inter-operate between the two, is to actually convert the simple geometry end points and rebuild the network using numpy. – dassouki Aug 18 '10 at 11:34

High quality map production: it's possible with FOSS, but a bunch of extra work.

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I'd like to see a bridge with Inkscape, or similar, for cartography. I think ArcMap could have been so much better if ESRI had made an alliance with Adobe Illustrator, both in terms of cartographic quality and ease of use. The proprietary and corporate nature of both organisations makes such cooperation very difficult if not impossible. They've spent an enormous amount of resources reinventing each others capablities. The culture of the open source ecosystem makes space for a tremendous opportunity here. It will be a real work though, because cartography is just plain hard. – matt wilkie Jul 29 '10 at 17:58

I'd love to see a sophisticated suite of spatial interpolation tools available in OGR/GDAL or another suite with python bindings. Ordinary and tension splines, inverse distance weighted, and kriging.

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