Orthophoto Generation

Generation of Orthophoto for 12000 images of European Cities

Scope

Generation of Orthophoto for 12000 images of European Cities with a Geometric Accuracy of 50 cm
Year: 2006-07

Background and Objectives
Our client is a leading Photogrammetry company offering services in the field of Airborne Surveying and Photogrammetry, Digital Orthophoto Production and Mapping with specialized services in Airborne Spatial Data Acquisition of the earth’s surface and its advanced processing into Geo-Information products.

Key Aspects of the Project:
The key objective of this project was the generation of Orthophoto for 12000 images of French cities with a geometric accuracy of 50 cm. The processes involved in carrying out this project are Ortho Rectification, Mosaicing, Seamline Editing, and Tile Cutting. Generating Seamless Tiles, removal of hot spot, Global Tilting and Color Balancing were also involved in the project.
Services Rendered & Methodology
The client’s requirements from this project were: 

• Generation of 1KM / 1KM Seamless Color Balanced Orthophoto Tiles.

Inputs:

• Digital UltraCam X, LVL3 images 8-bit / RGB / TIF
• Input GSD – 15 cm
• Aerial Triangulation Results (EO parameters)
• Roads Vector data
• DEM points

Services Rendered:

• Ortho Rectification using Vector and DEM data
• Mosaicing : Seamless stitching of rectified images
• Seamline Generation
• Color Balancing and Artifact Removal
• Tile Generation

Deliverables:

• Geo TIF and TFW files 
• 1KM X 1KM tiles
• Output GSD 12.5 cm
• Seamlines in DXF and ArcGIS format

Magnasoft’s team of Orthophoto specialists based on their strong expertise in Orthophoto projects, Leica Mosaic Pro and Adobe Photoshop successfully delivered outputs as per specifications.

Tools Used

• Leica Mosaic Pro
• Adobe Photoshop
• ArcGIS and Microstation

Snap shots of few cities