For years my GPS routes from hikes sat in a folder on disk, and the places I’d been or wanted to go were mostly in my head. I’d never found a tool that held both.
Phone apps already do a lot of this. CoMaps and OsmAnd both keep bookmarks and GPS routes on the same map, and Trail Sense covers the outdoor utility side. I still use all three. But they are phone apps, and what I save in them stays on the phone. I wanted one copy on a machine I own, reachable from any device with a browser.
Ferd is that option: one map for the pins and the lines, running on my own machine.
Under the hood it’s small. About 5 MB of code, made of one web page, a small Python API, and a SQLite database behind it.
Nothing about it is technically novel. What it gives me is the thing I’d been looking for, which is one map for both the dots and the lines, reachable from any device.