I have a set of pedestrian streets for a city. I would like to assign all of the streets that can be reached to one another along a continuous network to a unique group. I am wondering if there’s an off the shelf method (QGIS, ArcGIS, PgRouting) that can do this.
I have an image of roughly what I would like to accomplish. Basically, I have a set of roads on an “island” that are broken up barriers that make walking impossible (Interstates, Rivers, etc.). I want the continuous part of each network to be assigned to its own group. For reference, I am trying to create "T-Communities" described in Grannis, Rick. "T‐Communities: Pedestrian Street Networks and Residential Segregation in Chicago, Los Angeles, and New York." City & Community 4.3 (2005): 295-321.