A Comparative Evaluation of Georeferencing Techniques in UAV Photogrammetry: a Case Study From the Czech Republic

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

A Comparative Evaluation of Georeferencing Techniques in UAV Photogrammetry: a Case Study From the Czech Republic

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

A Comparative Evaluation of Georeferencing Techniques in UAV Photogrammetry: a Case Study From the Czech Republic

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10500 - Earth and related environmental sciences

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geographia Technica

ISSN

1842-5135

e-ISSN

2065-4421

Svazek periodika

20

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

RO - Rumunsko

Počet stran výsledku

13

Strana od-do

205-217

Kód UT WoS článku

001593097800013

EID výsledku v databázi Scopus

2-s2.0-105016011107