Metric: % of high NPT routes coverage

[dabreegster]

• [ ] Pick a cutoff value per area (Go Dutch value, quantile per area, something else -- will need decision from @Robinlovelace on this)
• [ ] See what percent of these high-percent routes are in the edited network. Decide how to calculate this -- percent of road segments? (But if one segment was missing from a longer route, all with high demand, then that would be a problematic gap)

[dabreegster]

To calculate this one, we need zone-based OD data to plug in. I've started by using https://raw.githubusercontent.com/nptscot/npt/main/data-raw/od_subset.csv from an od2net example, but this is just sample data. @Robinlovelace, can we start figuring out the supply of OD data?

• one big file Scotland-wide is fine; I can chop it up during data prep for NPW. Or smaller areas fine too, if they match the boundaries we'll use here
• whatever data we use will be public, so it can't directly rely on any private school layer
• we'll have to play around to figure out how many OD pairs we ultimately calculate routes for in the web app, to balance accuracy and performance. For now, could you provide the full OD flows?

[Robinlovelace]

Sure, can provide.

[Robinlovelace]

First thing to say: we're using a commissioned DataZone-DataZone level version of the OD data: https://vscode.dev/github/nptscot/npt/blob/test-chunk_run_pr/code/prep_commute_data.R#L12-L13

We can use MSOA as a fallback:

[Robinlovelace]

Just trying to find the OD data..

[Robinlovelace]

Here you go: https://github.com/nptscot/inputdata/releases/download/v1/desire_lines_scotland.csv

[Robinlovelace]

These are IZ-IZ flows with Euclidean distance of less than 30km.

IZ info: https://spatialdata.gov.scot/geonetwork/srv/api/records/389787c0-697d-4824-9ca9-9ce8cb79d6f5

[Robinlovelace]

We do need to create an open all-purpose OD dataset at some point but that's a good starter and unblocks this issue, right?

[dabreegster]

Thanks, this looks perfect to start, yes