uMap VS GarminDB

Umap?

If that's not feasible and what you're doing isn't secret then perhaps something like uMap might work? This allows you to add overlays for the things you want to highlight and has a few different styles of basemap that tone down some of the clutter of the default "default" style. It also lets you pull (small amounts) of data into it via Overpass e.g. pre-mapped fishing spots or toilets. This can then be shared as a link or embedded in a site.

Having an OSM basemap overlaid with points is easily possible with uMap, for example https://umap.openstreetmap.fr/

Have you used the OpenStreetMap ecosystem of ID/JSOM or maybe uMap (https://wiki.openstreetmap.org/wiki/UMap) if you need the data separated from OSM?

Not an App, but did you take a look at https://wiki.openstreetmap.org/wiki/UMap? With it you can make personal maps with OSM base layers.

Depends what you mean by private. For something shareable on the web you might want to try one of the uMap instances, not sure if you can keep them secret though. If you decide to use them I recommend you log into an OSM account first as otherwise it is very easy to lose the edit link.

For public display one of the uMap instances is probably easiest. It should allow you to import your previously exported points and also allows line and area attributes. The share link included embed code for a website. The instance linked by /u/beardy64 is probably the most popular, but there are several listed at my previous link. I would recommend you log in before creating the maps as without a login you have to carefully keep track of you edit URL's if you might ever want to update things.

- https://github.com/umap-project/umap/blob/master/docs/install.md

If someone is looking for an open-source webinterface for OpenStreetMap that offers a bit more eye candy, I recommend taking a look at Qwant Maps. Another useful OSM tool is uMap (source).

How are you syncing/storing the data?

I've been a Garmin user for nearly a decade and would really like to get the data off their platform so I can do more with it.

There are a few self-hosted options (https://github.com/tcgoetz/GarminDB seems like the best) but I keep kicking that can down the road.

You may want to check out https://github.com/tcgoetz/GarminDB if you're using a newer (Elevate v4 or v5 sensor) Garmin device.

https://graphhopper.com/maps/ is an amazing product that is open source, but it just does routing (with GPX download). I wish it had a little PostGIS data browser that I could write into via routes I draw on the map, or I upload (or import from other devices using something like GarminDB or similar). That, and adding arbitrary points, would be great. Just a simple, general-purpose map authoring tool. I just feel like I'm missing something, it seems like this would exist already.

If you are just interested in getting the data, GarminDB works really well.

Have a look at GarminDB. It allows you to download all your activity files.

I found this https://github.com/tcgoetz/GarminDB, it looks like the thing you're talking about. However it doesn't use "the" API or a API: It web-scrapes the data from your "Daily Summary" page on Garmin Connect. It can also import data that has been exported (manually) from Garmin Connect. Neither of these two are an API.

Ah, sorry I thought I had linked GarminDB in my post. It's a set of python scripts for downloading fitness and health data from Garmin Connect or a Garmin device via USB and importing into a SQLite database. The idea is then to visualize/analyze the data with something like Jupyter.

This tool is for Peloton -> Garmin. I personally haven't tried to export Garmin -> X myself as I haven't had the need yet, but there seems to be a few repos where I'd start looking: * https://github.com/petergardfjall/garminexport * https://github.com/tcgoetz/GarminDB