Some public domain data (for example nat. gas compressors, manufacturing facilities, pumping stations, gas storages) from the US HIFLD & Alltheplaces excerpts which I use as reference. (still everything is confirmed via the websites or other means, (for example HIFLD manufacturing is +10 years old, so this is also obviously nesessary)) I could also open the data in a new tab, and use it as a reference then, but this saves time and is especially more comfortable.

(using data as a reference is not copying, and especially not importing)