I am working on an MIT-licensed project that uses OpenStreetMap data (in tile form) within both PNG- and HTML-based charts. (Here’s a sample HTML-based map; its source code can be found here.) I didn’t make any edits to the underlying OpenStreetMap data; I’m simply using that data (via Plotly) to add cities, bodies of water, and other geographic/political features to my maps.
My understanding of the Open Database License is that these charts are produced works, and thus do not need to be shared under the CC-BY-SA or a similar license. However, I wanted to make sure that this is the case both for PNG-based and HTML-based charts. If anyone could confirm this, I’d greatly appreciate it!