Model set up

The first step in setting up the space syntax model is to indicate in the “Map” and “Unlinks” tabs which of the existing vector layers should be used in the analysis. The map layer must be a lines layer, while the unlinks layer can be any type of feature, i.e. points, lines or polygons.

If there are no valid layers in the QGIS “Layers” panel the drop list will be empty. All layers must be in a projected CRS.

If you don't have any layers, you can either open an existing QGIS project, add a new layer to the QGIS session, or create a new layer and draw the axial map/unlinks on it. The “OpenLayers” plugin can be very useful for creating new axial models because it loads layers with cartography and aerial imagery from OpenStreetMap, Google, Bing and other providers onto the QGIS canvas. Please refer to the QGIS documentation for details on these operations.