I can use some help understanding the different German boundaries. We want to index the streetnames per city. So you can do a search for country -> city/town/village -> street -> housenumber. In most countries, all cities, towns and villages have boundaries with admin_level=8 or 9. So if those are indexed, all cities and towns are indexed, and no other administrative divisions. But In Germany, there seem to be Stadtstaate Stadtstaaten (with admin_ level=4), Kreisfreie Städte (with admin_ level=6) and Amtsfreie Gemeinden (with admin_level=7). Is it true that, when f.e. for a Stadtstaat with a boundary with admin_level=4, there will be no other boundary added with admin_level=8, to follow the very generally adopted convention that 8 and 9 are used for cities? I wonder why this system was chosen. And how we could possibly make a difference between a Kreisfreie Stadt and a Kreis when indexing the streets. Or is there some better place where I could ask this (I don't know which communication channels are most actively used in Germany)

I can use some help understanding the different German boundaries. We want to index the streetnames per city. So you can do a search for country -> city/town/village -> street -> housenumber. In most countries, all cities, towns and villages have boundaries with admin_level=8 or 9. So if those are indexed, all cities and towns are indexed, and no other administrative divisions. But In Germany, there seem to be Stadtstaate (with admin_ level=4), Kreisfreie Städte (with admin_ level=6) and Amtsfreie Gemeinden (with admin_level=7). Is it true that, when f.e. for a Stadtstaat with a boundary with admin_level=4, there will be no other boundary added with admin_level=8, to follow the very generally adopted convention that 8 and 9 are used for cities? I wonder why this system was chosen. And how we could possibly make a difference between a Kreisfreie Stadt and a Kreis when indexing the streets. Or is there some better place where I could ask this (I don't know which communication channels are most actively used in Germany)

I can use some help understanding the different German boundaries. We want to index the streetnames per city. So you can do a search for country -> city/town/village -> street -> housenumber. In most countries, all cities, towns and villages have boundaries with admin_level=8 or 9. So if those are indexed, all cities and towns are indexed, and no other administrative divisions. But In Germany, there seem to be Stadtstaate (with admin_ level=4), Kreisfreie Städte (with admin_ level=6) and Amtsfreie Gemeinden (with admin_level=7). Is it true that, when f.e. for a Stadtstaat with a boundary with admin_level=4, there will be no other boundary added with admin_level=8, to follow the very generally adopted convention that 8 and 9 are used for cities? I wonder why this system was chosen. And how we could possibly make a difference between a Kreisfreie Stadt and a Kreis when indexing the streets.