Orthomosaiks

An orthomosaic is a georeferenced, orthorectified mosaic of aerial photographs or satellite imagery. It is created by stitching together multiple overlapping images of an area and correcting for geometric distortions caused by camera tilt, terrain relief, and lens aberrations. The result is a single, seamless, and geometrically accurate image where all features are represented in their true planimetric positions, as if viewed directly from above.

The process of creating an orthomosaic typically involves several key steps. First, aerial images are captured from a drone or aircraft. These images are then processed using photogrammetry software. This software identifies common points across overlapping images to establish a 3D model of the terrain and then uses this model to rectify each individual image. Finally, the rectified images are mosaicked together to form the final orthomosaic.

Orthomosaics are valuable for a wide range of applications. They provide highly detailed and accurate maps that can be used for land surveying, construction planning, agricultural monitoring, environmental assessment, and urban planning. Their ability to display accurate measurements and spatial relationships makes them a powerful tool for decision-making in various industries. The resolution of an orthomosaic can vary greatly depending on the sensor and altitude of the aerial platform used in its creation, ranging from several centimeters to sub-meter ground sampling distances.