Mapping and aerial surveying
A consistent spatial baseline to understand, compare and plan sites.
Application and objective
Photogrammetric surveying transforms overlapping images into spatial products for planning and management. Resolution, control points and reference systems should be selected according to the intended use, not simply the map’s appearance.
Acquisition and quality criteria
Planning defines ground sampling distance (GSD), image overlap, coordinate reference system and verification method. Ground control and independent checkpoints are specified according to required accuracy. A digital surface model represents observed surfaces, including vegetation and buildings; it is not automatically a terrain model.
What the project can cover
- —Definition of area, resolution and coordinate reference.
- —Coverage and control point planning where applicable.
- —Processing and checking of the agreed products.
Planned deliverables
Orthomosaics, surface models, point clouds or other products according to the contract and feasibility. Formats, target accuracy and acceptance criteria are stated in the proposal.
Image resolution is not positional accuracy. Products intended for cadastral, legal or engineering uses depend on applicable requirements and professional qualifications.
Identified records
Images and observations organised using the asset reference defined for the project.
Agreed outputs
Formats, analysis depth and acceptance criteria established in the proposal.
Information for project assessment
Provide the location, approximate extent, asset type, objective, schedule and any access restrictions. Feasibility and final scope are confirmed after assessing these conditions.
Discuss this service ↗Frequently asked questions
Can I commission a one-off survey?
Yes. The proposal may cover one survey or recurring campaigns, subject to the objective, feasibility and access conditions.
Does the survey replace a technical assessment?
Not automatically. Data acquisition, analysis and formal technical assessment are distinct activities. Where required, professional responsibility and associated documentation must form part of the scope.