|Orthophotos are aerial photographies that have been geometrically corrected such that the scale is uniform, having each pixel an associated geographic coordinate. Orthophotos have the same lack of distortion as maps, so they are an accurate representation of the Earth's surface that can be used to measure distances.
Using photogrammetric software we can rectify the aerial images acquired with our UAV systems and merge them in order to create orthorectified image mosaics of the desired extension.
Main features of CATUAV orthophotos are:
- Resolution from 5 cm/pixel to 2 m/pixel.
- Areas of up to 1000 hectares per flight.
- Can be generated in different bands: visible, near infrared, thermal, hyperspectral...
- One week delivery: the time from UAV takeoff to orthophtoto delivery is less than a week.
- Delivered in any desired industry standard format.
- Manual Control Points can be added to allow comparisons with any previous work.
|Using calibrated digital cameras we can obtain high resolution orthophotos with lower cost and higher flexibility than conventional aerial systems such as manned aircraft or satellites. One of the main features is the high repeatability, being able to perform multiple flights in the same place without a substantial increase in the total cost. Thanks to this CATUAV orthophotos can be used in a huge range of applications:
|Our UAV systems can perform night flights thanks to the use of GPS aided navigation and inertial attitude control. This allows us to obtain aerial images of urban areas when other traditional systems can’t, resulting in the following applications:
|Our UAV systems can be equipped with multiple cams, allowing us the acquisition of images in multiple spectral bands: visible, near infrared, thermal, hyperspectral... Those images can be postprocessed (for example to compute vegetation index) and orthophotos can be generated for each spectral band, resulting in a huge range of applications:
|The generation of the orthophotos is made using software that automatically applies photogrammetric principles to rectify the images. As input it needs georeferenced aerial images and the usage of a calibrated camera. This process leads to submeter precisions in the full orthophoto extension, which can still can be increased adding manual control points.|