Trail Finder

File descriptions

1. query.py - Downloads the ways (trails) from OSM. Visualises them in osm_way_visualization.html and also stores the downloaded ways in way_objects.json so that you do not have to run the file again and download it.

2. graph.py - Forms a graph with a way as a node, and other ways as its child nodes if those ways start where the parent way ends. Also, finds all the ways with no parents, and stores them in first_way_objects.json - Not a super important file for the pipeline.

3. first_nodes_visualise.py - Just visualises the ways in the above file, and stores that visualisation in osm_first_way_visualization.html - It is useful to see the beginning of a lot of trails.

4. get_intersections.py - SUPER IMPORTANT. - Go through all the ways, and finds intersections. Then breaks each way down into smaller trails.

5. get_way_gradients.ipynb - SUPER IMPORTANT - way_metrics.json is calculated here which contains metrics of the smaller broken ways

Upcoming tasks

1. Store new broken down ways, and build a new graph with all these ways. Remember to discard original ways, which were later broken down.

2. Add properties to every edge of the graph, and node (trail properties - gradient, distance, elevation gain)