In the Node_list folder, each CSV file has the name convention like AL_1000_node_list.csv, for example, this means the table contains the list of nodes that make up the network for Austria (as country code, AL) at the spatial clustering distance threshold of 1000m. The table has 3 columns with column names, and without row names.

• Each row in the table is a record of one node, the node ID is the row_id of the record in the table, the first record has a row_id of 0.

• The first column in the table is the X coordinate of the mass center of the node.

• The second column in the table is the Y coordinate of the mass center of the node.

• The third column in the table is the Size of the node, i.e., the number of pixels of this city.

In the Edge_list folder, each TXT file has the name convention like AL_1000_edges.txt, for example, this means the table contains the list of edges that make up the network for Austria (as country code, AL) at the spatial clustering distance threshold of 1000m. The table has 2 columns without column name, without row name.

• Each row in the table is a record of one edge that is composed of a pair of nodes, the node ID is the row_id of that node in the node_list table.

• The first column in the table is the ID of the node on one side of an edge.

• The second column in the table is the ID of the node on the other side of an edge.

The SFA_args_LSPT_out.cpp file contains the C++ code to do the SFA calculation, detailed information can be found in the documentation of the code file.

The SFA_config.ini file contains some configuration parameters for running the compiled program, details can also be found in the file. This file has to be put in the same folder as the compiled executable file.