create_meso_layers()

This method creates the link and node layers for the meso-scale freight highway network.

copy_meso_info()

This copies the required feature classes from the MFN into a feature dataset called meso_info within the MFHN.gdb.

create_freight_node_fcs()

1. This method merges the centroid nodes and logistic nodes into a feature class called special_nodes.
2. It then spatially joins the highway nodes (hwynode_all) to their corresponding mesozones (Meso_External_CMAP_merge) which creates a new feature class (hwynode_zone). If anything goes wrong in this part, it's written to meso_join_errors.txt.

subset_to_meso()

For the years specified in input_years.csv, this method copies the highway links into a feature dataset called hwylinks_meso and subsets to the links which (1) exist in that year (NEW_BASELINK = 1), (2) are part of the meso-scale freight highway network (MESO = 1), and (3) are not centroid connectors (TYPE1 != 6).

find_hanging_nodes()

With networkx's function to determine connected components, this method finds hanging nodes and links, or nodes and links which are not connected to the rest of the meso network.

1. For each of the meso networks, the method creates feature classes for the disconnected nodes in a feature dataset called hanging_nodes.
2. For each of the meso networks, disconnected links are then marked with HANGING = "Y."

connect_special_nodes()

A feature dataset called conn_links is created. For each of the build years, the special nodes in the special_nodes feature class are connected to the ANODE of the nearest non-hanging link.

create_final_networks()

1. A feature dataset called final_links is created. For each of the build years, non-hanging highway links are written into a feature class, as well as connector links.
2. A feature dataset called final_nodes is created. For each of the build years, relevant nodes are written into a feature class.