1 – Objective
To acquire high-accuracy spatial data using UAV (Unmanned Aerial Vehicle) and satellite-based technologies for mapping, engineering design, monitoring, and analysis purposes.

2 – Pre-Flight and Mission Planning
• Define project objectives and area of interest (AOI).
• Obtain flight permissions and coordinate with relevant authorities.
• Plan flight routes using mission software (DJI Pilot, UGCS, or Pix4D Capture).
• Select appropriate flight altitude and overlap (≥75%) for required Ground Sampling Distance (GSD).

3 – Data Acquisition – Drone Survey
• Deploy UAV with RTK/PPK-enabled GNSS for high positional accuracy.
• Capture nadir and oblique images for 3D modeling.
• Ensure stable lighting conditions and consistent flight speed.
• Use GCPs (Ground Control Points) and checkpoints for geo-referencing.
• Backup and verify captured images on site.

4 – Satellite Imagery Acquisition
• Identify the optimal satellite source (Maxar, Airbus, PlanetScope, Sentinel).
• Select spatial resolution according to project needs:
o 0.3–0.5 m GSD: Engineering-grade
o 1–3 m GSD: Regional or infrastructure studies
o >10 m GSD: Environmental monitoring
• Acquire cloud-free, recent imagery for accurate mapping.

5 – Data Processing
• Process drone imagery using photogrammetry software (Pix4D, Agisoft Metashape).
• Generate:
o Orthomosaic (2D)
o Digital Terrain Model (DTM)
o Digital Surface Model (DSM)
o 3D Point Cloud and textured model
• Satellite imagery processing through remote sensing software (ERDAS, ENVI, QGIS).
• Apply radiometric and geometric corrections.

6 – Integration and Analysis
• Integrate UAV and satellite datasets in GIS environment.
• Extract features such as terrain, vegetation, and infrastructure boundaries.
• Perform volumetric analysis, change detection, and progress monitoring.
• Correlate with ground survey and engineering design data.

7 – Quality Control
• Validate positional accuracy using GCPs and checkpoints.
• Compare UAV-derived data with topographic control.
• Ensure final orthomosaic RMSE < 5 cm for engineering-grade surveys.
• Perform visual inspection for completeness and distortion.

8 – Deliverables
• Orthomosaic map (GeoTIFF / DWG / PDF)
• DTM and DSM models (LAS / TIF)
• 3D mesh and point cloud (OBJ / PLY / XYZ)
• Processed satellite imagery and interpretation layers
• Final Drone and Satellite Data Report (DSDR)