Surveys & mapping
LiDAR vs photogrammetry: choosing a drone survey method
Choose the method around terrain, vegetation, deliverables and evidence of accuracy not simply the most expensive sensor.
The assessment in brief
Who should consider UAV Surveys?
UAV Surveys is relevant to construction, engineering and infrastructure teams purchasing measured site information rather than aerial imagery alone. Its published offer combines LiDAR, photogrammetry, mapping and geospatial processing, with roof and facade surveys and stockpile measurement among the applications. Our editorial assessment is that the receiving team's specification should lead the commission: agree the measurement purpose, control, acceptance evidence and usable files before selecting a capture method. The advertised workflow is not a guarantee of accuracy for every site, and this guide has not tested the delivered datasets.
Strengths to consider
- A published focus on measured mapping, LiDAR and geospatial processing.
- A mapping workflow covering assessment, control, capture, quality assurance and delivery.
- Construction and earthworks applications alongside roof, facade and infrastructure work.
What to check
- Agree tolerances and coordinate and height references with independent accuracy evidence.
- Confirm how vegetation and site conditions affect the proposed survey method.
- Approve downstream formats and separate building interpretation from image capture.
Service fit ratings
| Roof inspections | |
|---|---|
| Surveying & mapping | |
| Photography & film | |
| Thermal imaging | |
| Construction progress | |
| Infrastructure |
These describe the focus of advertised services. They are not customer satisfaction or tested quality scores. “Not assessed” does not mean unavailable. How the criteria work.
Agreeing a measured survey specification
The homepage advertises survey control and checkpoints where required, alongside nationwide availability from a Cambridgeshire base. The aerial mapping page sets out project assessment, control, capture, processing, quality assurance and delivery. Those stages offer buyers a framework for discussing how the commission will be checked, but their inclusion on a website does not establish a particular tolerance for an individual project.
As buyer guidance, send the survey boundary, intended engineering use and any existing control information. Agree coordinate and height references, required tolerances and which independent checks will evidence the achieved result. Ask for the acceptance report and how gaps will be addressed. For roof or facade work, specify whether you need imagery, measured geometry or professional building interpretation; those outputs should not be treated as interchangeable.
Selecting LiDAR or photogrammetry for the site
The LiDAR page describes land and terrain, construction and earthworks, woodland and infrastructure applications, while noting that vegetation and site conditions affect results. Photogrammetry and aerial mapping are also advertised. This gives buyers more than one method to discuss, without implying that either technique will reveal every feature or produce identical results in every environment.
Describe vegetation, surface materials, steep changes in level and any areas hidden from aerial views. Ask why the proposed method suits the required deliverable and whether supplementary ground capture is needed. Agree classification and processing scope, not just the sensor. If the priority is terrain below vegetation, request a clear explanation of expected coverage and limitations. A method choice should follow the site's evidence requirements, not an unsupported accuracy promise.
Usable datasets and repeat construction surveys
Aerial mapping deliverables include orthomosaics, point clouds, terrain and surface models, contours and CAD or GIS outputs, with LAS, LAZ and GeoTIFF formats as applicable. The wider offer includes stockpile measurement and aerial photography or videography. Construction buyers should distinguish measured quantities and aligned survey datasets from visual progress images, even when both are captured during the same visit.
Have the receiving engineer approve sample files and export requirements before booking. Specify licensing, file naming, processing responsibilities and any further drawings or classifications. For repeat surveys, agree consistent boundaries, control and alignment between dates, plus the treatment of stockpile bases and inaccessible areas. Decide how quantity changes will be calculated and checked. Retain the underlying datasets and acceptance evidence needed to compare future visits, rather than rely only on presentation images.
Pricing & getting a quotation
Use the official site's contact navigation for a site specific quotation; no public price is assumed. Itemise control, capture, geospatial processing, classification, drawings and delivery. For repeat construction surveys, distinguish initial setup from later visits and agree the comparison outputs each time. Include travel, VAT, weather arrangements, revisions, licensing and exports. Compare proposals against the same measurement purpose and acceptance requirements, not simply the area flown or a promised file extension.
For a consistent comparison, use our drone service cost guide and buyer’s checklist.
Questions to ask UAV Surveys
- Which tolerances, coordinate and height references and independent accuracy checks will our survey use?
- Why does the proposed LiDAR or photogrammetry method suit our vegetation, surfaces and required coverage?
- Which engineer approved formats, processing, licensing and repeat survey alignment are included in the quotation?
