A Comparative Evaluation of Georeferencing Techniques in UAV Photogrammetry: a Case Study From the Czech Republic
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F25%3A10257962" target="_blank" >RIV/61989100:27350/25:10257962 - isvavai.cz</a>
Result on the web
<a href="https://technicalgeography.org/pdf/2_2025/13_moyo.pdf" target="_blank" >https://technicalgeography.org/pdf/2_2025/13_moyo.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.21163/GT_2025.202.13" target="_blank" >10.21163/GT_2025.202.13</a>
Alternative languages
Result language
angličtina
Original language name
A Comparative Evaluation of Georeferencing Techniques in UAV Photogrammetry: a Case Study From the Czech Republic
Original language description
The study evaluates the positional accuracy of geospatial products generated using direct (GNSS RTK-based) and indirect (Ground Control Points-based) georeferencing methods in UAV photogrammetry. Using the DJI Mavic 3 Enterprise quadcopter, surveys were conducted at two contrasting sites in the Czech Republic: a flat agricultural area and rugged terrain in the area affected by a landslide. Acquired RGB image sets were processed using consistent photogrammetric workflows. Resulting digital elevation models (DEMs) and orthophoto mosaics were analyzed against independently measuredcontrol points. Vertical and horizontal accuracies were assessed through RMSE and haversine-based distance calculations. Findings indicate that while both georeferencing methods produced centimeter-level accuracy, indirect georeferencing using GCPs yielded better quality in height. For horizontal accuracy, the results slightly varied between the two areas. In the flat area, direct georeferencing produced slightly better accuracy than indirect georeferencing whereas in the hilly area, the GCP-based approach was slightly superior. The study concludes that while GCPs can still provide some benefits in the quality of georeferencing, RTK-enabled UAVs offer a practical alternative for rapid, efficient deployment in suitable contexts.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Geographia Technica
ISSN
1842-5135
e-ISSN
2065-4421
Volume of the periodical
20
Issue of the periodical within the volume
2
Country of publishing house
RO - ROMANIA
Number of pages
13
Pages from-to
205-217
UT code for WoS article
001593097800013
EID of the result in the Scopus database
2-s2.0-105016011107