Hello Yuru,
Thank you for your interest in PST. After verifying with you that the question concerned the difference between analysis results using depthmap and PST in QGIS, I answer to all as it may interest other subscribers of the mailing list.
PST has some functionalities that also are available in programs such as Depthmap: Reach, Network Integration, Angular Integration, Network Betweenness and Angular Choice.
PST allows the same space syntax analysis as above based on the axial map (or angular analysis based on the road-center-line map), but especially, it opens possibilities to include attractions in the analysis, as either origins or destinations.
The additional analysis include Attraction Distance that captures proximity and measures the distance from the origin points such as addresses to some kind of attraction, for instance primary schools. Further, it includes Attraction Reach measures that calculates the total amount of attractions that can be reached within a certain distance from the points of origin. Thus, this is a kind of density measure giving you an idea of how many schools, shops or people can be reached within a neighborhood (defined by distance).
There are some other features in PST that can be useful such as the "create segment map" that helps to edit a road-center-line map so that it confirms the requirements of Space Syntax analysis.
I hope this gives you more insight in the differences between PST and Depthmap.
All the best,
Meta Berghauser Pont
Associate Professor Urban Design
Spatial Morphology Group (SMoG)
Chalmers University of Technology
Department of Architecture and Civil Engineering Sven Hultins gata 6 (room SB-K 395)
SE-412 96 Gothenburg, Sweden
+46 (0) 73 4233637
[log in to unmask]
www.smog.chalmers.se
www.chalmers.se
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