Cached map tiles from publicly available aerial images (open data) provided by Open Data Österreich.
Summary: Aerial images of Linz with 20cm resolution (May 2011)
Source: https://www.data.gv.at/katalog/dataset/ogdlinz_orthofotos73518
Cache format: XYZ web map tiles (zoom level 19)
License: Creative Commons Namensnennung 4.0 International