What are the typical causes for anomalies in the overlap of aerial photo stereo pairs?

In real circumstances, the aircraft (and camera within) direction and position can be disturbed by external factors causing anomalies in the overlapping of aerial photo pairs ...

What are the characteristics and differences between RTK and PPK drone?

Today, there are currently two technologies driving the conversation around GPS correction technology – Real Time Kinematic (RTK) and Post Processing Kinematic (PPK)...

Obtaining economical point clouds from semi-global matching (SGM)

Semi-global matching allows high-density point clouds of the first reflective surface to be rapidly and automatically extracted from stereo-imagery ...

What is the role of the image matching procedure in photogrammetry?

In the photogrammetry for the creation of point clouds, digital 3D models and orthophoto maps a stereo pair of aerial photographs is used ...

Why phenomena of Ghosting and Motion Blur occur in photogrammetry

When taking aerial photos of an area where a certain object is moving, the position of such an object is seen as changed in the respective images captured at different points in time …

What checks and calibrations are required for unmanned aerial vehicles?

To ensure operational reliability, flight safety and the quality of captured geospatial data with an unmanned aerial vehicle, careful monitoring of the aircraft condition and professional calibration of the entire device as well as its individual parts are required ...

What is the difference between ‘accuracy’ and ‘precision’?

Quality is illustrated by several criteria, including geometric accuracy and geometric precision, but these two terms need to be distinguished from one another ...

How progressive numbers of Ground Control Points effect on the DEM and orthoimage accuracies

Interesting results of the study, how progressive numbers of Ground Control Points (GCP) effect on the DEM and orthoimage accuracies ...

What is the area that can be imaged by the eBee drone during one flight?

The area size that can be imaged during the flight depends on the flight altitude ...

How do I find my drone if it flies out of radio range or crashes?

A senseFly drone flying out of radio range poses no problem. It certainly does not usually lead to a crash ...