GCAM Aerial Mapping - Digital Orthophotography

Digital Orthophotos

Digital orthophotos are geographically and geometrically corrected aerial images.

 

Digital Ortho Image

Ace Aerial Ortho Images are a combination of aerial imagery and digital elevation models. The final orthorectified image has all the visual benefits, features and detail found in aerial photographs combined with the geospatial qualities of a map.  This enhances the integration and sharing of data.  Our process also allows us to adjust the radiometric properties of the image for a “project-wide” average, which eliminates harsh image steps within a single orthophoto image and between adjacent images.  The transitions between the raw photographic images are undetectable in the final products. Ace Aerial ortho images are available at various pixel resolutions, which can apply to many different applications.

From mission planning, image acquisition and processing, Ace Aerial has the capabilities to deliver high resolution digital ortho-photos.

The process of Ortho Rectification incorporates:

(1). Aerotriangulation, which provides the position and attitude of the camera at exposure.

(2). Surface elevation model (or Digital Terrain Model).

(3). Scanned imagery.

Typical pixel resolutions for these images are .5 foot for 1"=200' final scale map.

Digital orthophotos provide an image backdrop in GIS / mapping applications. The information in these images proveded is a perfect suplement to traditional map data.

What is an Ortho Photo?

An orthophoto or orthoimage is an aerial photograph geometrically corrected such that the scale is uniform: the photo has the same lack of distortion as a map. Unlike an uncorrected aerial photograph, an orthophotograph can be used to measure true distances, because it is an accurate representation of the Earth's surface, having been adjusted for topographic relief, lens distortion, and camera tilt.