In early 2020 I was drafting a blog post about projects to crowd-source information about street trees. I was annoyed that so many projects (including ones with "open" in their names) created closed silos of data from the free contributions of volunteers. I was trying to come up with a simple tool to make it easy for normal people to update trees in OpenStreetMap instead. Then the pandemic happened. Anyway, more than three years on, I've finally written it up https://open-innovations.org/blog/2023-05-23-where-are-all-the-trees