Service Area

Photogrammetry, 3D Digital Modelling & Measured Building Surveys

Turning terrain, structures and façades into measurable digital twins using UAVs, laser scanning and modern surveying technologies.

Photogrammetry produces measurable three-dimensional data from overlapping photographs. Imagery captured from low altitude by UAV is processed into a scaled digital twin of the terrain or structure; distance, area, volume and height can be read from that model.

Its clearest advantage over conventional surveying is coverage speed. A site that would be measured point by point with a total station becomes millions of points in a single flight. In return, photogrammetry only measures what it can see; where the line of sight is blocked, conventional surveying or laser scanning takes over.

Terrestrial laser scanning is used for structures and façades. In restoration, renovation and measured building survey work the structure is documented as it actually stands — including its distortions and deformations. The result is not an idealised drawing but the real geometry of the building.

  • Photogrammetric Mapping

    Fast, highly detailed and measurable modelling of large areas using UAV and aerial imagery.

    Scope

    • Photogrammetric base map
    • Orthophoto
    • Digital Surface Model (DSM)
    • Digital Terrain Model (DTM)
    • Point cloud
    • 3D terrain model

  • 3D Modelling & Façade Surveys

    Three-dimensional documentation of structures, façades and existing conditions through high-precision measurement, and preparation of that data for drafting and modelling workflows.

    Scope

    • 3D building modelling
    • 3D façade survey
    • 3D measured architectural survey
    • Laser scanning
    • Point cloud
    • CAD drawings
    • As-is condition model

  • Measured Building Surveys & Documentation

    Measuring the true condition of existing structures and producing technical drawings and datasets for architectural design, restoration, renovation or archiving processes.

    Scope

    • Measured architectural survey
    • Restitution survey
    • Façade survey
    • Tree surveys
    • As-is condition surveys
    • Area and dimension verification

How We Work

Process

  1. Flight and scan plan

    Flight altitude, overlap ratio and scan station positions are planned according to site size and the accuracy required.

  2. Ground control points

    Control targets placed on site are measured precisely with GNSS. Tying the model to the national coordinate system and proving its accuracy both depend on these points.

  3. Data capture

    The UAV flight or terrestrial laser scan is carried out; on building work, interior and exterior scans are registered together.

  4. Processing

    Imagery and scans are combined into point clouds, orthophotos and surface models; an accuracy report is produced from the control points.

  5. Drawing and delivery

    CAD drawings, sections and 3D models are produced from the point cloud and delivered in the requested format.

Deliverables

What you receive

  • Georeferenced orthophoto (GeoTIFF)
  • Point cloud (LAS / LAZ / E57)
  • Digital surface model (DSM) and digital terrain model (DTM)
  • 3D mesh model
  • Measured survey drawings: plan, section, elevation (DWG)
  • Façade orthophotos
  • Contour lines
  • Accuracy report

FAQ

Common questions

How accurate is drone surveying?
A flight supported by ground control points achieves centimetre-level accuracy. Precision depends on flight altitude, camera resolution and how control points are distributed across the site; without control points, positional error can reach metres.
Is permission required for UAV flights?
In Türkiye, UAV flights are subject to Directorate General of Civil Aviation regulations; flights near airports and in restricted zones require authorisation. The permit process is included in planning.
Can a terrain model be produced under tree cover?
Photogrammetry only measures surfaces it can see, and ground is not visible under dense vegetation. In that case either a leaf-off season is chosen or LiDAR, which partially penetrates vegetation, is preferred.
Does the building need to be empty for a measured survey?
No, but the surfaces to be measured need to be visible. Where furniture or stored material covers walls and floors, data will be missing in those areas.

Service Areas

Districts we serve in Istanbul

We fly drone mapping and UAV photogrammetry missions and produce orthophotos in Istanbul's open areas, and run 3D laser scanning, LiDAR mapping, point cloud, measured building and 3D facade surveys in its dense districts. Facade and heritage surveys are common in Kadıköy, Üsküdar, Beşiktaş and Sarıyer; 3D modelling and reality capture projects in Ataşehir, Maltepe, Kartal, Pendik, Ümraniye, Beykoz, Bakırköy, Başakşehir, Beylikdüzü and Silivri.

  • Istanbul
  • Kadıköy
  • Üsküdar
  • Ataşehir
  • Maltepe
  • Kartal
  • Pendik
  • Ümraniye
  • Beykoz
  • Bakırköy
  • Beşiktaş
  • Sarıyer
  • Başakşehir
  • Beylikdüzü
  • Silivri

Other Areas

Related service areas

Let's determine the right survey approach for your project together.

We listen to the field conditions and what the project needs, then recommend the appropriate method.

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