ortofotografiat

Orthofotografiat refers to the production and use of orthophotographs, a type of aerial imagery that is geometrically corrected, or orthorectified, to remove distortions caused by camera tilt, sensor perspective, and terrain relief. The resulting image, known as an orthoimage, has a uniform scale, allowing it to be used as a precise map. The orthorectification process utilizes digital photogrammetry techniques, combining controlled aerial photography, ground control points, and digital elevation models to transform raw photographs into spatially accurate products.

These orthoimages are widely employed in geographic information systems (GIS), urban planning, agriculture, forestry, and environmental monitoring. Because of their metric accuracy, they support tasks such as boundary delineation, infrastructure assessment, land‑use mapping, and change detection over time. In many countries, national mapping agencies and private enterprises routinely supply orthoimage datasets that serve as baselines for cartographic products and remote‑sensing analyses.

Technological advances have increased the resolution and availability of orthoimages. High‑resolution sensors mounted on drones or satellites, coupled with advanced processing algorithms, enable the generation of orthoimages with sub‑meter or even centimeter ground sampling distances. However, the accuracy of orthoimages still depends on the quality of control data and the precision of the elevation model used. Consequently, best practices recommend rigorous ground control point acquisition and the use of high‑quality digital elevation models to achieve desired levels of positional accuracy.