I live in an area where tons of data is missing. I mean the whole areas with no street addresses, missing streets, missing bike routes, etc.
Is there a guide or special tools for preparing to make massive edits like this? Is there a particular work flow that people use or resources? How do I even get started?
I would recommend using Mapilio to get street-level imagery for your area that you can then refer back to when mapping bike lanes, streets, etc. You can record from a phone attached to your bike or car.