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  Soham -> Services -> Photogrammetry  
     
 
 
Aerial Triangulation & Block Adjustment
Aero Triangulation is the first and the most important step in digital Photogrammetry. Aerial Triangulation (AT) is the process of densifying and extending ground control through computational means. We scale and level each stereo model using the adjusted coordinate values of the tie and pass points located in the stereo model. Then, we adjust photos using block of images with bundle adjustment for arriving at the most stable and accurate solution.
   
Planimetric feature extraction
 
The objective of Planimetric collection is preparation of base map for different applications with complete, accurate and correct feature coded data set in full compliance to the project specification. We implement extensive stero-data compilation skills, combined with customized tools, providing excellent accuracy, completeness and correct coding of digital vector data. We provide the collected Planimetric data in a wide range of industry standard output formats. Main categories of features usually captured by us are Structures, Transportation, Hydrographic, Vegetation, Utility, Hypsographic & Others.
Our stero data compilation extends into different scales of film based, digital photographs and high resolution satellite images.
   
DEM/DTM/DSM
Digital elevation model (DEM) or Digital Terrain Model (DTM) is a representation of a topographic surface derived from aerial photography of perspective projection.The representation is compiled using digital photogrammetric workstations. Our high Quality Digital Surface Model (DSM) extraction procedures will ensure the data accuracy as per the terrain elevation. Contours will be generated and annotated in different intervals and suiting the project requirement. Data shall also be delivered in Triangulated Irregular Network format.
   
   
 
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