Rectified Aerial Photography
Ortho-rectified imagery is derived from aerial photography that has been geometrically corrected. It provides accurate representation of the earth’s surface, having been adjusted for topographic relief, lens distortion, and camera tilt. Unlike an uncorrected aerial photograph, an ortho-photograph can be used to measure true distances.
Ortho-rectified imagery can be integrated with other data layers in a GIS environment to provide a powerful visual analysis tool. Digital ortho-photography is available over many areas of Ireland at a variety of resolutions and dates.