Get the parcel-by-parcel subsurface breakdown for one transaction across two dimensions: mining terrains and major groundwater reservoirs. For each linked plot that overlaps either — the mining-terrain status ('active' | 'former') with its mineral class ('subsidence' = extraction with surface deformation, the actual mining-damage risk; 'surface' = open-pit working, mostly local impact; 'fluid' = borehole extraction; 'other'), the groundwater-reservoir status ('documented' | 'undocumented'), the share of the plot inside each, and the per-object lists (mining terrain: name, oversight authority, validity dates; reservoir: number, name, documentation).
A mining terrain is a legally defined zone of anticipated mining influence; its mapped location is approximate — an intersection is an advisory signal to verify with the competent mining-supervision authority, not a legal determination. A groundwater reservoir's extent alone imposes NO restriction; a restriction would come only from an established protection zone, which is not published here.
Use it for a specific transaction to see whether its land overlaps a mining terrain or a major groundwater reservoir, and the per-object detail. For a parcel with no transaction, get_parcel_report lists the same terrains and reservoirs in its subsurface section.
TWO-STATE: a transaction whose land overlaps neither layer returns nothing — absence of data is never an assertion of safety. Cost: 4 tokens (refunded when there is no subsurface data).