Engineering geology – boreholes

There are over 404,000 boreholes in the Engineering Geology Database (BDGI), including:

- 308 120 boreholes located in the areas of Geological and Engineering Atlas,
 - 19 860 boreholes drilled in the country (outside the Atlas area), introduced from geological and engineering documentation created from 2013,
 - over 76,020 boreholes from the area of ​​Warsaw in the form of Geotechnical Worksheets.

The BDGI contains information on stratigraphy, genesis, lithology, physical and mechanical properties of the drilled soil and rock layers, macroscopic examinations and separate geological and engineering series (only for holes used to create geological and engineering atlases).

Drilling hole cards contain information about the location, x and y coordinates in the PL-1992 system, ordinate H, investor, client, drilling type and purpose, drilling dates, geological supervision and others, e.g. on documentation under which they were made.