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Surveying and Mapping
Commercial Drone Surveys and Mapping
DJI commercial platforms excel in survey and mapping with IP45 durability, and RTK for cm-level accuracy. Pairs with Zenmuse L1 LiDAR for true-color point clouds and P1 45MP camera for photogrammetry; supports AI tracking, 3-payload mounting, and DJI Terra integration for efficient ortho/3D modeling in construction and infrastructure.
DJI Matrice 4E advances geospatial tasks with 49-minute endurance, 21m/s speed, and integrated RTK/NTRIP. Features 20MP wide-angle mechanical shutter, 48MP telephoto, 5-directional oblique capture (up to 2.8 km² per flight), and Distortion Correction 2.0 for mm-precision; ideal for large-scale topo surveys, 3D reconstruction, and DJI Pilot 2 auto-reports in mining/construction.
Topography
Drone topography delivers cm-accurate elevation models in hours instead of weeks. DJI Matrice 300/4E with P1 or L2 payloads flies grid patterns at 100–150 m, capturing 45–100 MP photos or LiDAR point clouds. Ground control points + RTK lock absolute accuracy to 3–5 cm. DJI Terra or Pix4D processes into georeferenced orthomosaics, DSMs, DTMs, and contour lines ready for Civil 3D or ArcGIS. One flight covers 200–500 hectares; perfect for cut/fill calcs, stockpile volumes, and pre-construction grading plans.
Lidar Mapping
Fully integrated LiDAR + RGB solution:
- Livox Avia sensor: 240,000 points/sec (triple-return), 450 m max range, 20 cm vertical accuracy at 100 m
- 20 MP 1-inch CMOS RGB camera for true-color point clouds
- Accuracy: 5 cm horizontal / 3 cm vertical with RTK + 4–6 GCPs
- Outputs LAS/LAZ directly importable into DJI Terra, Reality Scan, or Civil 3D
- Ideal for dense vegetation penetration, powerline classification, and high-precision DTM delivery on large sites.
Ntrip GNSS Reciever
GNSS RTK Accuracy
GNSS RTK receivers achieve centimeter-level accuracy (typically 1-2 cm horizontal/vertical) via NTRIP corrections, with baselines up to 60 km for optimal results. Factors like baseline distance, multipath, and atmospheric conditions may degrade to 2-5 cm at longer ranges (e.g., 40 km). Use Emlid Caster for free streaming or local CORS networks for survey-grade precision.
Digital Terrain Models
Digital Terrain Models (DTMs) are bare-earth elevation grids created by stripping vegetation and structures from drone LiDAR point clouds Process:
- Fly RTK grid at designated AGL
- Classify ground returns in DJI Terra or LP360
- Generate 5–10 cm resolution raster (GeoTIFF)
- Export contours (0.5–1 ft intervals) for Civil 3D/ArcGIS
