Extract agencies from GTFS feed when only a URL is provided

[emmambd]

What problem is your feature request trying to solve? Oftentimes, we'll only receive a feed URL with no other information.

Solution

Extract "transit providers" from agencies.txt in cases where the transit provider value is null in the feed form.

• Extract agencies from agencies.txt and display in a comma separated list.
• Need to be able to mark which feeds you want to extract agencies from (automatic or manual?)

We know this is done when... Transit provider value is always generated/provided. Should test with just a URL.