Pavel Sidlichovsky
Head of Department
Czech Land Survey Office
Czech Republic

Biography
Pavel Sidlichovsky graduated from the Czech technical university at 1996 as surveyor and cartographer. Ever since he works at Land Survey Office of the Czech republic, starting as photogrammetrist, introducing digital photogrammetry and ortophoto production in the office. In 2006 he was appointed head of Fundamental Base of Geographic Data (ZABAGED) Data Collection Department and in 2009 he took over responsibility for ZABAGED Database Administration Department. Currently he is responsible for development both of ZABAGED and web portal (Geoportal.cuzk.cz).

Abstract
Harmonizing at the Borders

The presentation covers work done by Czech NMA in the cooperation with foreign partners on determination of the common border line and edge matching of the crossborder features for medium scale topographic databases. The current status of work in progress is described for borders with all four neigboring countries, including varying initial conditions. Main challenges include different methods of determination of state boundaries in international agreements, different coordinate systems and transformation methods for source databases and differing approaches to classification and identification of object types. Maintenance of edge-matching, once achieved, is crucial benefit for future aplications and despite the challenges we believe that upkeeping the edge matching at the source level data is the most efficient way.