ortorektifitseeritakse

Ortorektifitseeritakse is a Finnish term that translates to "orthorectified" in English, referring to the process of correcting geometric distortions in aerial or satellite imagery. This correction is essential for creating accurate maps and performing spatial analysis. The process involves removing distortions caused by factors such as the angle of the sensor, the curvature of the Earth, and the terrain's topography.

To orthorectify an image, a digital elevation model (DEM) of the terrain is typically used. This DEM provides elevation data for each point in the image. Using the DEM and information about the sensor's position and orientation at the time of capture, each pixel in the original image is geometrically repositioned to its correct ground location. This results in an orthophoto, which has the geometric accuracy of a map, meaning that measurements of distance, area, and shape can be taken directly from it.

The orthorectification process significantly improves the usability of aerial and satellite imagery for various applications. These include land use planning, environmental monitoring, disaster management, and infrastructure development. Without orthorectification, the distortions in raw imagery would lead to inaccurate representations of the Earth's surface, rendering them unsuitable for precise mapping and measurement.