Orthorectification is a process of removing the effects of tilt, relief, and many of the lens aberrations from standard perspective photographs.
Orthophotos are maps, created by geometrically corrected Aerial Photographs.We create digital orthophotos using Inpho software.

Digital orthophoto are used as maps, for visual identification, also with combination of other mapping products like DTM and contours.
 
To generate a digital orthophoto that most closely achieves the resolution of the continuous tone, original aerial image, we apply a variety of image enhancement and edge sharpening routines using special Image Processing techniques.
The process involves color / contrast matching and feathering techniques to ensure a virtually seamless mosaic. Many images can be mosaicked together and resampled to produce an overview image file to supplement the original orthoimages. Accuracy is measured by comparing the rectified position of ground control point to the true coordinates of the point.

At SGS Infotech Pvt. Ltd., we create orthophotos with pixel size of 10cm, 20cm, 40cm and 80cm. We work on RGB and Infra Red Imagery.