Collected Data

Important

• This section describes collected datasets that are used to create data for the Vietnam Transport Risk Analysis (VTRA)
• The datasets listed here are specfic to Vietnam and are used as inputs to data in the Processed Data Assembly steps
• To implement the VTRA pre-processing without any changes in existing codes, all data described here should be created and stored exactly as indicated below

Networks

1. All pre-processed networks data are stored:

   • In sub-folders in the file path - /data/pre_processed_networks_data/
   • As Shapefiles with of network nodes and edges
   • The names of files and folders are self-explanatory
   • See /data/pre_processed_networks_data/networks_description.xlsx for details of all shapefiles

2. All nodes should have the following attributes:

   • node_id - String Node ID
   • geometry - Point geometry of node with projection ESPG:4326
   • variable list of attributes depending upon sector

3. All edges should have the following attributes:

   • edge_id - String edge ID
   • g_id - Integer edge ID
   • from_node - String node ID that should be present in node_id column
   • to_node - String node ID that should be present in node_id column
   • geometry - LineString geometry of edge with projection ESPG:4326
   • variable list of attributes depending upon sector

Note

We assume that networks are provided as topologically correct connected graphs: each edge is a single LineString (may be straight line or more complex line), but must have exactly two endpoints, which are labelled as from_node and to_node (the values of these attributes must correspond to the node_id of a node).

Wherever two edges meet, we assume that there is a shared node, matching each of the intersecting edge endpoints. For example, at a t-junction there will be three edges meeting at one node.

Cost attributes

1. Data to assign transport costs to network edges are stored:

   • In the file in path - /data/pre_processed_networks_data/mode_costs.xlsx
   • As Excel sheets

2. All cost estimtates should have the following attributes:

   • time_cost_usd - Float values of rate of time
   • tariff_min_vnd - Float values minimum tariff rate in VND/ton-km (VND/ton for multi)
   • tariff_max_vnd - Float values maximum tariff rate in VND/ton-km (VND/ton for multi)
   • tariff_min_usd - Float values minimum tariff rate in USD/ton-km (USD/ton for multi)
   • tariff_max_usd - Float values maximum tariff rate in USD/ton-km (USD/ton for multi)
   • attributes to decide how the costs are allocated to network edges (if none then all edges have same criteria)

Road design attributes

1. Data to assign characteristics to roads are stored:

   • In the file in path - /data/pre_processed_networks_data/road_properties.xlsx
   • As Excel sheets
   • See /data/pre_processed_networks_data/road_properties.xlsx for data description

VITRANNS2 OD data

1. VITRANSS2 province-level OD matrices are stored:

   • In the path - data/OD_data/
   • As Excel sheets
   • goods sheet gives OD values by commodity
   • modes sheet gives OD values by mode

2. Aggregated goods-wise province-level national OD matrices have attributes:

   • o - Integer IDs of origin Provinces
   • d - Integer IDs of of destination Provinces
   • name o - String names of origin Provinces
   • name d - String names of destination Provinces
   • commodity_names - Float values of daily tonnages of commodities/industries between OD Provinces

3. Aggregated mode-wise province-level national OD matrices have attributes:

   • o - Integer IDs of origin Provinces
   • d - Integer IDs of of destination Provinces
   • name o - String names of origin Provinces
   • name d - String names of destination Provinces
   • mode_names - Float values of daily tonnages along modes between OD Provinces

IFPRI crop data

1. IFPRI crop datasets are stored:

   • In the path - data/Agriculture_crops/
   • As GeoTiff files
   • Only files with names SPAM_P_crop name_ver3.tif are used
   • See Excel sheet in path data/Agriculture_crops//crop_data/crop_unit_costs.xlsx for costs of crops

2. All crop GeoTiff datasets should have attributes:

   • values greater than 0
   • raster grid geometry
   • projection systems: Default assumed = EPSG:4326

RiceAtlas data

1. RiceAtlas datasets are stored:

   • In the path - data/rice_atlas_vietnam/
   • As Shapefiles
   • Only the file rice_production.shp is used

2. The essential attributes in the dataset are listed below. See the data for all attributes:

   • sub_region - String names of Provinces in English
   • P_Jan, …, P_Dec - Column names with float tonnage produced in each month from January to December
   • geometry - Polygon geometries of Provinces

Points of interest data

1. Locations of populations, commune, district, province center committee points datasets are stored:

   • In the path - data/Points_of_interest/
   • As Shapefiles

2. The essential attributes in all the dataset are listed below. See the data for all attributes:

   • geometry - Point geometry with projection ESPG:4326