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changes.mady.by.user Maiwenn Herpe

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📊 Examples of potential applications

  • Visual analysis.

  • DEM photogrammetry.

  • Bathymetry.

  • Water surface elevation.

  • Flood monitoring, particle velocimetry.

  • Algal bloom monitoring/mapping.

  • Landslide mapping/characterisation.

  • Classification of surfaces.

📏 Range of flight height and captured zone width (m)

Operated within line of sight, observation altitudes often capped at 120 m.

🔗 Airshare website

📏 Spectral Range (nm)

Red, green, blue,
c. 400 -700 nm.

📏 Spatial Resolution (m)

Depends on flight altitude and lens. Spatial resolution typically less than 15 cm.

Tip

Benefits

  • High spatial resolution.

  • Can adjust the time of imagery capture to the needs.

  • Can capture video.

  • Ability to capture data in remote, unsafe or difficult to access locations, lowering safety risks.

Note

Limitations

  • Need operator to acquire data in the field and battery life can limit survey duration.

  • Lower spectral resolution.

  • Limited by visibility constraints and poor weather conditions.

  • Very sensitive to environmental and illumination conditions.

Selection of references

📚 Lee G, Choi M, Yu W, Jung K. 2019. Creation of river terrain data using region growing method based on point cloud data from UAV photography. Quaternary International. 519:255-262. doi:https://doi.org/10.1016/j.quaint.2019.04.005

🔗 https://www.sciencedirect.com/science/article/pii/S1040618218311868


📚 Mohamad N, Abdul Khanan MF, Ahmad A, Md Din AH, Shahabi H. 2019. Evaluating Water Level Changes at Different Tidal Phases Using UAV Photogrammetry and GNSS Vertical Data. Sensors. 19(17):3778.

🔗 https://www.mdpi.com/1424-8220/19/17/3778


📚 Koutalakis P, Tzoraki O, Zaimes G. 2019. UAVs for Hydrologic Scopes: Application of a Low-Cost UAV to Estimate Surface Water Velocity by Using Three Different Image-Based Methods. Drones. 3(1):14.

🔗 https://www.mdpi.com/2504-446X/3/1/14


📚 Ma S, Xu C, Shao X, Zhang P, Liang X, Tian Y. 2019. Geometric and kinematic features of a landslide in Mabian Sichuan, China, derived from UAV photography. Landslides. 16(2):373-381. doi:10.1007/s10346-018-1104-z.

🔗 https://doi.org/10.1007/s10346-018-1104-z


📚 Bandini F, Sunding TP, Linde J, Smith O, Jensen IK, Köppl CJ, Butts M, Bauer-Gottwein P. 2020. Unmanned Aerial System (UAS) observations of water surface elevation in a small stream: Comparison of radar altimetry, LIDAR and photogrammetry techniques. Remote Sensing of Environment. 237:111487. doi:https://doi.org/10.1016/j.rse.2019.111487

🔗 https://www.sciencedirect.com/science/article/pii/S0034425719305061