Photogrammetry

We have carried out a number of successful Aerial Photogrammetry projects, from topographical surveys to large city center road surveys for transport route planning. 

Our service offerings include aerial triangulation, planimetric data collection, DEM and contour generation, mosaicing, and orthophoto production.

Photogrammetry services we offer:
  • Aerial Triangulation.
  • Planimetric Feature Collection.
  • Digital Elevation Model.
  • Contour mapping.
  • Topographic feature mapping.
  • 3D Building Modeling.

Aerial Triangulation

Aerial Triangulation is the calculation of true ground co-ordinates, used as the base reference in photogrammetry. Aerial triangulation is the most important part of this project and will be performed using the socket set. The exterior orientation(EO) will be generated using the Airborne GlobalPositioning System (AGPS). The final solution will be delivered in required formats. The Final AT solution will be used for several photogrammetry and orthophoto generation.

Digital Elevation Model

A Digital Terrain Model (DTM) represents the earth’s surface without objects like vegetation and buildings. Small footprint stereo pairs with significant overlap are used to automatically generate 3D mass point terrain data and the points are edited using triangulated stereo images..

3D breaklines along ridges, roads and any ground features showing a break in the terrain are added to the 3D mass points, resulting in a highly accurate digital terrain model.

We provide Digital surface models (DSM), digital terrain models (DTM), digital elevation models (DEM) and Contour as per client’s requirements.

  • Highly accurate engineering grade bare earth DTMs from aerial and drone imagery
  • Automated mass point generation and stereo derived breaklines

Planimetric Feature Collection

We carry out topographic and planimetric data capture in 3D according to the required specifications and various map scales.

  • Different scale Planimmetry Mapping
  • Topographic Mapping
  • Manual contour Mapping
  • Hydrological Mapping
  • Road corridor Mapping
  • Mining Mapping
  • Utility Mapping
  • Land use development Mapping

3D Building Modelling

We create 3D city models on the final output of orthophoto. The orthophotos are used as the base map and the height models for 3D modeling. The process is followed by texturing for a better 3D visualization.

  • TIN generated mesh
  • Textured modeling
  • Automated building modeling