areas of adjacent images.
The data processing is not complicated. First, all aerial images were
imported from the camera to the computer. It was necessary that the
images have adequate overlap between each other. From the Exif metadata,
their approximated interior orientation (focal length and image
sensor size) was determined. Thereafter, a step-wise processing of
the image collection began: (1) align photos, (2) build geometry, and
(3) build texture (if required). Each step gave several possibilities to adjust
parameters, which have influence on the accuracy and structure of
the results and the processing time.