Hello, I am a senior grade student in university and nowadays conducting a study about change of the urban structure(in terms of commercial activities) after certain transportation project.
After the project, several pedestrian roads will be installed(which is correspond to axial line in SSA) so that the number of people in the area will grow to much larger degree.
If I can quantify the differences of number of pedestrians between before/after of business commensement I will eventually reflect this as a variable to making a model(ex: regression, whatever) that analyzing commercial activity.
I've been studying SSM theory and notions, but couldn't find materials that I can get technical information...And as I heard, the procedure is AutoCAD or QGIS > depthmap > R, but so what? I have no idea how to do this in detail, and above all, I don't know how to use AutoCAD. So can anyone tell me how to analyize space syntax with QGIS? I've downloaded depthmapX 0.35 and QGIS space syntax toolkit already but don't know how to do further. I'm despairing now.
So please give your hand regarding this to this poor novice student :(
Hello sir, have you tried to follow this tutorial?
https://www.spacesyntax.online/software-and-manuals/
They seem to have dxf here (which is where maybe you might want to edit the stuff in autocad but sincerely this is obviously not mandatory as soon as you get a proper segment map in QGIS that the plugin can deal with, which I know not in detail however because I never tried myself this kind of analysis) : https://urbanidades.arq.br/mapasconfiguracionais/tag/mapa-axial/
At last I suggest also you read the article nearby, and maybe try to get in touch with one of the authors of this tool related to space-syntax :
"PST is an open source tool for performing spatial analyses"
Code PST Documentation_v.3.2.3_20210708
Here would be how I would start myself anyway.
You may take a look at the following publication regarding the procedure of combination of SS and GIS in respect to land use compatibility with pedestrian demand.
Article The influence of social interactions on the behavioral patte...
Min Seok Won
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I never tried to do this kind analysis so I'm not sure.
My opinion is that you'll need a kind of "connected skeleton" representing the streets and probably also to keep track of how they connect of course.
So that makes sense to me to talk about axial map or segments map. My additional asumption here, is that you will need that 2 connected streets should be represented by 2 segments or "axis", also connected.
Then the buildings would be delivered in another file.
As a reminder, to be sure you can understand my point of view, the DXF format is a file that stores only geometry. If you provide a DXF with segments to QGIS it will be used by QGIS as a data classified as a "VECTOR" of type "MULTILINE". You must look after the WKT codification format to understand what geometry is used by QGIS. WKT for example is Well-Known-Text, that is a very simple way to code a geometry, so that a spatial database engine will be able to do very powerful queries on this known format. Example : LINESTRING(0 0, 1 1, 2 1, 2 2).
See https://www.postgis.net/workshops/postgis-intro/geometries.html.
My guess then is that when you will have provided the segments in DXF, then get the linestrings in QGIS, one or another plugin of spatial analys in QGIS will ask you for the buildings if needed and so on.
About how to import a DXF in QGIS, just try to DRAG and DROP a DXF in QGIS, in general it will open a wizard that will ask you if you want to import the data. Otherwise you will have to search the menus for the import. Your goal is to end with what QGIS calls a VECTOR, which can be a shp or something else that is essentially a list of geometries associated to other attributes (all in the sense of Databases, which allows you for much power in term of query).
Hope it helps a little.
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