{"id":711,"date":"2026-10-05T08:49:19","date_gmt":"2026-10-05T08:49:19","guid":{"rendered":"https:\/\/laoearth.com\/portfolio-item\/highlight-projects\/"},"modified":"2026-10-05T09:43:28","modified_gmt":"2026-10-05T09:43:28","slug":"drone-photogrammetry-drone-lidar-survey","status":"publish","type":"portfolio","link":"https:\/\/laoearth.com\/ko\/portfolio-item\/drone-photogrammetry-drone-lidar-survey\/","title":{"rendered":"Drone photogrammetry\/Drone Lidar survey"},"content":{"rendered":"

Topographic Survey & UAV LiDAR Data Acquisition<\/h1>\n

LaoEarth conducted a high-precision topographic survey and UAV LiDAR data acquisition<\/strong> using advanced aerial and ground-based geospatial technologies. The survey integrated DJI M300 RTK, DJI Zenmuse L1 LiDAR, CHCNAV AlphaAir 450 LiDAR, GNSS surveying, and RTK positioning<\/strong> to capture accurate terrain and surface information across the project area.<\/p>\n

Survey Control & Georeferencing<\/h2>\n

During the UAV survey, a DJI ground base station<\/strong> was established to provide RTK correction data to the drone, enabling accurate positioning and georeferencing of the acquired LiDAR and photographic data.<\/p>\n

The survey control network was established using GNSS observations and referenced to the applicable national geodetic coordinate framework<\/strong>, allowing the UAV-derived data to be consistently aligned with ground survey measurements and other geospatial datasets.<\/p>\n

This approach provides a reliable spatial reference for the production of topographic maps, point clouds, digital terrain models, digital surface models and 3D terrain representations<\/strong>.<\/p>\n

UAV Photogrammetry & Image Acquisition<\/h2>\n

Aerial imagery was acquired using a DJI M300 RTK<\/strong> platform over the project area.<\/p>\n

Survey Parameters:<\/strong><\/p>\n

    \n
  • UAV:<\/strong> DJI M300 RTK<\/li>\n
  • Flight altitude:<\/strong> Approximately 100\u2013120 m above ground level<\/li>\n
  • Flight speed:<\/strong> Approximately 6 m\/s<\/li>\n
  • Forward overlap:<\/strong> 80%<\/li>\n
  • Side overlap:<\/strong> 70%<\/li>\n
  • Survey width:<\/strong> Approximately 200 m<\/li>\n
  • Camera resolution:<\/strong> 20 MP<\/li>\n
  • Maximum flight time:<\/strong> Up to 31 minutes under specified conditions<\/li>\n
  • Positioning:<\/strong> RTK \/ GNSS<\/li>\n<\/ul>\n

    The selected flight parameters and image overlap were designed to provide sufficient image coverage and redundancy for accurate photogrammetric processing and 3D reconstruction.<\/p>\n

    UAV LiDAR Acquisition<\/h2>\n

    The project utilized DJI Zenmuse L1 LiDAR<\/strong> together with CHCNAV AlphaAir 450 LiDAR<\/strong> technology to capture high-density three-dimensional spatial data.<\/p>\n

    LiDAR acquisition provides detailed information about terrain and surface features and is particularly suitable for areas with complex topography, vegetation and other conditions where conventional photogrammetry may have limitations.<\/p>\n

    The resulting point-cloud dataset can be processed to generate:<\/p>\n

      \n
    • Classified point clouds<\/li>\n
    • Digital Terrain Models (DTM)<\/li>\n
    • Digital Surface Models (DSM)<\/li>\n
    • Contour maps<\/li>\n
    • Elevation data<\/li>\n
    • 3D terrain models<\/li>\n
    • Orthophoto maps<\/li>\n
    • Survey-grade geospatial datasets<\/li>\n<\/ul>\n

      GNSS & RTK Survey Control<\/h2>\n

      Ground control and verification surveys were conducted using dual-frequency geodetic GNSS receivers<\/strong>.<\/p>\n

      Survey methods included:<\/p>\n

        \n
      • GNSS Static Survey<\/li>\n
      • Fast Static Survey<\/li>\n
      • Real-Time Kinematic (RTK) Survey<\/li>\n
      • Ground Control Point (GCP) establishment<\/li>\n
      • Check-point measurement and accuracy verification<\/li>\n<\/ul>\n

        The GNSS equipment records observations from multiple satellite positioning systems, supporting accurate determination of survey coordinates and providing a reliable control framework for the UAV and LiDAR datasets.<\/p>\n

        Integrated Survey Workflow<\/h2>\n

        The combination of GNSS, RTK, UAV photogrammetry, LiDAR and ground-based survey control<\/strong> creates an integrated geospatial workflow from field data acquisition to final 3D mapping products.<\/p>\n

        GNSS Control \u2192 UAV RTK Flight \u2192 LiDAR & Image Acquisition \u2192 Point Cloud Processing \u2192 Georeferencing \u2192 Accuracy Verification \u2192 3D Mapping & Digital Terrain Products<\/strong><\/p>\n

        This integrated approach enables LaoEarth to efficiently transform physical terrain into accurate, high-resolution digital geospatial information<\/strong> for engineering, mining, construction, land development, property and infrastructure applications.<\/p>\n

        Drone photogrammetry and Drone Lidar Survey<\/strong><\/p>\n\n\t\t\t