depthmapX is a multi-platform software platform to perform a set of spatial network analyses designed to understand social processes within the built environment. It works at a variety of scales from building through small urban to whole cities or states. At each scale, the aim of the software is to produce a map of open space elements, connect them via some relationship (for example, intervisibility or overlap) and then perform graph analysis of the resulting network. The objective of the analysis is to derive variables which may have social or experiential significance.
Qgis Space Syntax Toolkit
The Qgis Space Syntax Toolkit is a QGIS plug-in for spatial network and statistical analysis. It provides a front-end for the depthmapX software within QGIS, offering user friendly space syntax analysis workflows in a GIS environment. It is primarily aimed at supporting the standard space syntax methodology, and enhancing its workflows with standard GIS data, analysis and visualisation features. However, the added functionality can be of general benefit to QGIS users by introducing new tools for exploratory spatial data analysis. The plug-in is being developed by Jorge Gil at the Space Syntax Laboratory, The Bartlett, UCL.
Currently the “Space Syntax Toolkit” consists of two modules: “Graph analysis” and “Attributes explorer”. The “Graph analysis” module supports the verification and analysis of the spatial network model. This consists of an axial map layer, representing the urban street network, and an unlinks layer, indicating bridges and tunnels with no level crossing. The module offers a verification tool to check the geometric and topological integrity of each layer, helping correct any problems before running the analysis. The axial and segment analysis is performed in depthmapXnet, via a direct link from QGIS, which receives and prepares the results once the calculations are completed. The “Attributes explorer” module supports the visual and statistical exploration of the analysis results. It provides quick analysis of individual quantitative attributes of a selected layer, mapping the values using simplified symbology settings, displaying essential descriptive statistics, and plotting basic interactive charts (histogram and scatter plot).
The current release of Confeego facilitates three analytical tasks: calculating point depth, calculating integration and associated measures, and graphically exploring relationships between spatial maps and associated statistical plots with the JMPstatistical package.
Point depth and integration can be calculated on maps of any type of intersecting spatial object, such as axial lines or convex polygons: Confeego can thus be used to generate the output data not only of Axman or Ovation but also of Pesh. In addition, integration can be calculated for the junctions where line objects intersect (as in axial maps). There are no built-in limits to the number of objects that can be processed in each map, although performance will vary according to map size and computer system specification.
Exploring spatial-statistical relationships with Confeego requires the use of JMP statistical software but allows users to recreate the Axman experience of selecting an object on a map and then finding its associated data point in a scatterplot. However, users have more flexibility with Confeego in exploring spatial-statistical relationships, as it allows users to select any object capable of being represented in MapInfo and finding it in any type of graph or plot capable of being generated in JMP.
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