Reconstruct from images
Photogrammetry derives geometry by comparing points seen in overlapping images. Camera positions and surface characteristics affect reconstruction: a sequence of photographs is not automatically a metric survey.
The project documents photogrammetric planning; no new cases or performance figures are added. Survey selection depends on the object, accessible perspectives and required outputs.
Plan coverage and observations
Overlap, viewpoint diversity, image sharpness and lighting need to support point matching. Uniform, repetitive, shiny or transparent surfaces can make matching ambiguous or incomplete.
Occlusion remains a limitation: surfaces invisible in images do not become reliable measurements through processing alone. Complementary views are planned or gaps are stated.
Scale, reference and checks
The model needs scale and positioning consistent with the project. Survey references and independent checks verify geometry; visual plausibility does not certify metric correctness.
Points used to constrain the model and verification points should remain distinguishable. Reporting describes checked areas, processing and conditions limiting use.
Photogrammetry and LiDAR: different data
Photogrammetry depends on images and matching common features; LiDAR measures laser ranges. Both require georeferencing and checks but respond differently to surfaces, visibility and acquisition conditions.
Integration can combine geometry and visual information if datasets are compared in the same reference. Models and orthophotos should be specified by use without automatically promising completeness or accuracy.
Related guides
Frequently asked questions
- Are photographs enough for a metric survey?
- No. Planned acquisition, scale, reference and checks are required.
- Is it equivalent to LiDAR?
- No. Their principles and quality-influencing conditions differ.
- What limits reconstruction?
- Occlusion, unsuitable images and surfaces without recognisable features can cause gaps and ambiguity.
What information does your project need?
Share the objective, site constraints and required deliverables so we can assess an appropriate survey strategy.
Submit your case