Google OR Tools TSP solver Shortest path

Uses the TSP solver in Google Optimization Tools.

Requirements

Python client to Google OR Tools:

easy_install ortools

Usage

usage: shortest_path_ortools.py [-h] [-i INIT_LOCATION] [-o OUTPUT]
                                [-d {euclidean,haversine,osrm}] [--plot]
                                [--save-plot SAVE_PLOT] [--save-map SAVE_MAP]
                                [--osrm-base-url OSRM_BASE_URL]
                                [--osrm-max-table-size OSRM_MAX_TABLE_SIZE]
                                input

Shortest Path for across points assigned

positional arguments:
  input                 Worker assigned road segments file

optional arguments:
  -h, --help            show this help message and exit
  -i INIT_LOCATION, --init-location INIT_LOCATION
                        First segment_id to start from each worker
  -o OUTPUT, --output OUTPUT
                        Output file name
  -d {euclidean,haversine,osrm}, --distance-func {euclidean,haversine,osrm}
                        Distance function for distance matrix
  --plot                Plot the output
  --save-plot SAVE_PLOT
                        Save plotting to file
  --save-map SAVE_MAP   Save map to HTML file
  --osrm-base-url OSRM_BASE_URL
                        Custom OSRM service URL
  --osrm-max-table-size OSRM_MAX_TABLE_SIZE
                        Maximum OSRM table size

Examples

Run the script to solve TSP for each cluster:

python -m allocator.shortest_path_ortools allocator/examples/delhi-buffoon-n50.csv --save-plot allocator/examples/TSP-ortools-buffoon/delhi/delhi-tsp.png -o allocator/examples/delhi-buffoon-shortest-ortools-tsp.csv

The TSP route will look like the following:

Run the script to solve TSP for each cluster:

python -m allocator.shortest_path_ortools allocator/examples/delhi-kmeans-n50.csv --save-plot allocator/examples/TSP-ortools-kmeans/delhi-tsp.png --save-map allocator/examples/TSP-ortools-kmeans/map/delhi-tsp.html -o allocator/examples/delhi-kmeans-shortest-ortools-tsp.csv

The TSP route will look like the following:

We can see actual route on OpenStreet Map if --save-map option is specified and will looks like this.