ULDK – Cadastral Parcel Location Service

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The Cadastral Parcel Location Service (ULDK) is an API provided by the Main Office of Geodesy and Cartography (GUGiK). It is used to locate cadastral (registry) parcels based on their number, district, municipality name, etc., and allows retrieving their geometry in vector form. The data source consists of county-level databases made available to GUGiK. These are parcels for Poland.

It is a tool that allows building custom tools for searching parcels.

Advantages:

  1. It works throughout Poland
  2. It operates reliably
  3. It is free, with no query limits
  4. It is up-to-date (results are retrieved live from the source, i.e., the database at the Center for Geodetic and Cartographic Documentation)

 

Disadvantages:

  1. It depends on county-level databases, so there may be times when searching for data in a specific county does not work due to technical issues
  2. The documentation is poor.

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