Photogrammetry Services

Digital Photogrammetry

That We Offers

Photogrammetry is the science of making measurements from photographs. The input to photogrammetry is photographs, and the output is typically a map, a drawing, a measurement, or a 3D model of some real-world object or scene.
  • Aerial Triangulation
  • Planimetric feature extraction
  • DTM Extraction
  • Digital Ortho Photo rectification
Procedure of establishing the geometric relationships among overlapping and side lapping photographs for determining the positions of supplement horizontal control points. It reduces substantially the control required by field methods.
  • Establishing Ground Control points
  • Line map of the project area showing flight lines.
  • Project boundaries.
  • Control point locations and identification numbers.
  • Description of Ground Control Points with coordinates.
  • Tie Points measure and transfer.
  • Block Adjustment.
Planimetric mapping is the representation of man made or natural features on a map These features are extracted form of line, point or polygon vectors. Typical planimetric features include buildings, roads, fences, utilities, vegetation, and water features.
Planimetric data are typically collected in 3D so ground features can be duplicated to the breakline layer and used to supplement the digital terrain model in topographic mapping The plan feature vectors are then converted into 2D to facilitate platterning. Using Photogrammetry is the most efficient way to extract high-quality feature vectors from remotely sensed data. We pride ourselves on producing deliverables meeting our clients’ expectations, and have the CAD experience to deliver the vector data virtually any format or specification desired. Our mapping processes are designed with rigorous QA/QC chcks to assure completeness and accuracy.
Digital Terrain model (DTM)- a bare earth model that contains elevations of natural terrain features such as barren ridge tops and river valleys.
Photomapping Services specializes in high-resolution orthophoto imagery production including digital orthophotos and orthophoto mosaics from raw aerial survey photography and digital image capture. Orthophotos coupled with a topographic mapping project give a precise reference (backdrop) tool that enhances the users understanding of any project area. Combined into orthophoto mosaics the imagery can cover a large area such as a catchment, river basin, freeway or local government area.An orthophoto is an aerial photograph that has been geometrically corrected or 'ortho-rectified' such that the scale of the photograph is uniform and utilised in the same manner as a map. An ortho- photograph can be used to measure true distances of features within the photograph.
Planimetric corrections have been applied to remove lens distortions and optics, camera angle, and differences in elevation (topographic relief) through a process of measuring ground control points to 'tie' the photo to the ground, in a drawing-pin like manner. An orthophoto is an accurate representation of the Earth’s surface. Orthophotos have the benefits of high detail, timely coverage combined with the benefits of a map including uniform scale and true geometry.