The technology of making orthophoto mosaics, i.e. digital orthophotos, is one of the most economical and efficient ways to obtain up-to-date topographic bases. Digital orthophoto is a product of surveying by the method of remote detection, which provides fast and mass collection of geospatial data and gives an overview of the topography of the recorded area. Selecting the appropriate pixel size in the field ensures the level of detail and accuracy required for specific purposes.
The Republic Geodetic Authority has data from a digital orthophoto obtained from aerial photogrammetric surveying from the epochs 2007-2010 and 2011-2013. Aerial photogrammetric recording 2007-2010. It was realized with surface sensors Vexcel UCX and UCXp, within the CARDS program of the European Union. Realization of aerial photogrammetric recording 2011-2013. It was performed with surface sensors Vexcel UCX and UCXp and line sensor Leica ADS80 within the Project of establishing the National Geospatial Data Infrastructure and the Centre for Remote Sensing of the Republic of Serbia - IGIS Project.
Using satellite images of different resolutions and epochs, orthomosaics were made for the territory of the Republic of Serbia:
• Resolutions 2.5 m for the territory of RS (2005-2007, archive);
• Resolutions 2.5 m for the territory of RS (2010/2011);
• Resolutions 0.5 m for the territory of AP Kosovo and Metohija (2010/2011);
• Resolutions 1.5 m for the territory of RS (2014/2015);
• Resolutions 0.3 m for 6 city areas (Beograd, Novi Sad, Nis, Kraljevo, Subotica i Kragujevac) of RS (2015/2016);
• Resolutions 0.4 m for the territory of RS (2015/2016);
• Resolutions 0.15 m for 4 city areas (Beograd, Novi Sad, Nis i Kragujevac) of RS (2020/2021);
• Resolutions 0.3 m for the territory of RS (2020/2021).
The validity of the data set has been confirmed and is in accordance with the Rulebook on topographic survey and topographic and cartographic products.