Explode shapefile on upload

[danrademacher]

to facilitate barrier selection, we need to break up all submitted shapefiles into their constituent line segments so it matches the indices of the graph that will be created.

[brelsford]

I think that the process here is to send the shapefile to topology, run the import/cleanup command from topology, have topology send back a geoJSON (which is stored as line segments) to the UI, and then have the user define barriers from that geoJSON, which can be sent back to topology.

[cesandoval]

I think so too Christa. Do you have a code snippet that we can use for the path computation with barriers?

[brelsford]

I'll write an example file for you now. The sad part I realized yesterday is that a shortcut I've been using to do the computation without barriers does work when there are barriers, so the code will run a lot slower for big blocks.

[brelsford]

it's here:

https://github.com/open-reblock/topology/blob/master/Barriers_example.py