@jwildeboer This is mainly for district heating, right? Are they still looking for underground water basins for plants similar to that in Freiham?
https://www.bayern-innovativ.de/en/emagazine/detail/en/page/munich-aims-for-62-percent-district-heating-share
https://www.geothermalstories.org/stories1/blog-post-title-one-7hrr7-zb3kx
It's difficult to find appropriate locations for bigger plants, makes sense to invest on mapping. Open data should help smaller plants and competitors too.