Pașcani

Pașcani Municipality, Iași County, and all adjacent localities: Blăgești, Boșteni, Gâștești, Lunca, and Sodomeni Creation of an orthophoto map for 7,500 ha at 3GSD
Purpose: urban development, PUG update
The project consists of the creation of a 3D digital model of the territory of Pașcani Municipality, Iași County, and all adjacent localities, including the creation of a digital orthophoto map at 3GSD, with a resolution of 1 m, and the creation of a digital terrain model at 1 m resolution.

ORTOFOTOPLAN – EXPORT ECW
CREARE ORTOFOTOPLAN
STUDIU DEM – diferențe nivel zona urbana
VERIFICAREA PRECIZIILOR – ERORI SUB 1CM

Creation of an orthophoto map and a point cloud for the general urban plan (PUG) and for an urban development plan

STAGES:

Step 1: Data collection

  1. Aerial photogrammetry:
    • Drone or airplane flight: Plan and execute a flight to capture aerial images of the location. Ensure that you cover the entire area of interest with sufficient overlap between images (70-80% longitudinal overlap and 60-70% lateral overlap).
    • Equipment: Use drones equipped with high-resolution cameras and, if possible, RTK GPS for increased accuracy.
  2. LIDAR (Light Detection and Ranging):
    • LIDAR flight: If available, a LIDAR flight can be used to collect detailed data on the terrain and buildings.
    • Equipment: LIDAR systems mounted on drones or small aircraft.

Step 2: Data processing

  1. Creation of the orthophoto map:
    • Image preprocessing: Import and align captured images in photogrammetric software (e.g., Pix4D, Agisoft Metashape).
    • Digital Surface Model (DSM) and Digital Terrain Model (DTM): Generate DSM and DTM to correct distortions.
    • Orthophoto: Create an orthophoto map using DSM/DTM to rectify aerial images to an orthogonal projection.
  2. Creating the point cloud:
    • 3D reconstruction: Uses photogrammetric software to generate a dense point cloud from aerial images.
    • LIDAR: If you used LIDAR, process the LIDAR data to generate the point cloud.

Step 3: Data validation and integration

  1. Data validation:
    • Quality control: Verify the accuracy of the orthophoto map and point cloud using ground control points (GCPs).
    • Corrections: Makes necessary corrections to ensure geospatial accuracy.
  2. Integration into GIS:
    • Import into GIS software: Import the orthophoto map and point cloud into GIS software (e.g., QGIS, ArcGIS).
    • Analysis and visualization: Use this data to perform spatial analyses and create visualizations for the general urban plan and urban development plan.

Recommended tools and software:

  • Photogrammetry: Pix4D, Agisoft Metashape
  • LIDAR: LAStools, CloudCompare
  • GIS: QGIS, ArcGIS
  • Other tools: Trimble Business Center, AutoCAD Civil 3D for integration and further analysis.

Final thoughts:

  1. Legality: Ensure you have all necessary permits for aerial flights and data collection.
  2. Collaboration: Work with local authorities and other stakeholders to ensure that the data collected and analyses performed comply with local requirements and regulations.
  3. Backup and security: Maintain backups of all data and ensure that it is stored securely.

These steps will enable you to create an accurate orthophoto map and a point cloud useful for urban planning and local development.

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