Underground Mined Areas of Oilshale
Data are based on the study carried out by the Tallinn Technical University in 2014-2015 "Põlevkivi altkaevandatud alade planšettide digitaliseerimine ja stabiilsushinnangu andmine (In Estonian)" ( 616.73 KB, 18.12.2015 ) .
The study was focused on digitizing the old underground oilshale mining areas and georeferencing the coordinates with the national L-EST97 system. The polygons were classified according to stability estimation.
The project was financed by the Environmental Investment Centre.
The Land Board made a topological revision of the data in 2016.