FIG – INTERNATIONAL FEDERATION OF SURVEYORS
ISPRS – INTERNATIONAL SOCIETY OF PHOTOGRAMMETRY AND REMOTE SENSING
CLGE – COUNCIL OF EUROPEAN GEODETIC SURVEYORS
EGoS – EUROPEAN GROUP OF SURVEYORS
IAG – INTERNATIONAL ASSOCIATION OF GEODESY
ITU – ISTANBUL TECHNICAL UNIVERSITY
USLMB – UNION OF SURVEYORS AND LAND MANAGERS IN BULGARIA
FSTU – FEDERATION OF SCIENTIFIC AND TECHNICAL UNIONS (BULGARIA)
BAS – BULGARIAN ACADEMY OF SCIENCES
UACEG – UNIVERSITY OF ARCHITECTURE, CIVIL ENGINEERING AND GEODESY – FACULTY OF GEODESY
AGCC – AGENCY OF GEODESY, CARTOGRAPHY AND CADASTRE
MAF – MINISTRY OF AGRICULTURE AND FOODS
MINISTRY OF DEFENSE – MILITARY TOPOGRAPHIC SERVICE
CGS – CHAMBER OF GRADUATED SURVEYORS
ASC – ASSOCIATION OF SURVEYING COMPANIES
CIID – CHAMBER OF ENGINEERS IN THE INVESTMENT DESIGN
USB-STGGS – UNION OF SCIENTIST IN BULGARIA – SECTION TECHNICAL AND GEOLOGY-GEOGRAPHY SCIENCES