Article Combining Data from Smartphones, Geodetic Sensors and External Databases By Trias Aditya, I.K. Ary Sucaya, Fajar Adi • October 14, 2021 A mobile app has been developed to improve the success of cadastral survey implementation in Indonesia. The country has set itself ambitious land registration targets by 2025. The national cadastral survey app called Survey Tanahku (‘My Land Survey’) is connected to external sensors for geodetic measurements and also to civil registry services.