Topographic Objects Database
A national geodetic reference database (BDOT10k) maintained under Polish surveying and cartography law, recording terrain features, land use, and infrastructure at a detailed scale — a useful cross-check when assessing a plot's real-world characteristics.
Applies to Poland.
Definition
The Topographic Objects Database (Baza Danych Obiektów Topograficznych, abbreviated BDOT10k, referring to its 1:10,000 reference scale) is maintained under the Geodetic and Cartographic Law and coordinated nationally by the Head Office of Geodesy and Cartography (GUGiK), with data compiled from county-level (starostwo) surveying records. It records the physical and administrative features of the terrain — roads, watercourses, forests, buildings, land use categories, and infrastructure corridors — as a standardized vector dataset.
Unlike the land and mortgage register, which records legal ownership, or the zoning plan, which sets what may be built, the topographic database describes what is physically on the ground today. It is most useful for cross-checking a plot's real terrain features — for example, confirming whether a mapped watercourse, forest boundary, or existing road actually affects the specific parcel — as a supplement to, not a replacement for, the official cadastral and register documents.
Examples
A buyer evaluating an undeveloped plot near a river consults BDOT10k data to see how close the mapped watercourse and its buffer zone come to the parcel boundary before committing to build.
A surveyor cross-references a plot's cadastral boundaries against the topographic database to confirm there is no discrepancy between the legally registered boundary and the physically mapped terrain.
How this affects buying and selling
Buyers and developers evaluating rural or semi-developed plots benefit from checking the topographic database alongside the zoning plan and land registry extract, since it can surface physical features — an unmapped-on-paper stream, an existing access track, dense forest cover — that affect buildability but don't show up in ownership or zoning documents alone.
