Photogrammetry And LIDAR - The 9 Key Differences

Q: Does LiDAR work at night or in poor light?

Yes, LiDAR is an active sensor that emits its own laser pulses, so it isn't dependent on ambient sunlight the way photogrammetry is. It performs consistently in overcast conditions, shadows, and low light, though standard drone flight rules around daylight operations still apply.

Q: Can you combine photogrammetry and LiDAR on the same project?

Yes. Many projects use LiDAR for accurate terrain and vegetation data alongside RGB imagery for visual documentation and orthomosaic mapping, giving both survey-grade accuracy and photorealistic detail from a single site visit.

Q: How accurate is LiDAR with ground control compared to without?

Without ground control, PPK drone LiDAR surveys typically achieve around 5cm XY and 10cm vertical accuracy. With sufficient ground control this improves to around 3cm XY and 5cm vertical, and with ground control plus data checking by a registered surveyor, 2cm XY and 3cm vertical accuracy has been demonstrated. Results depend on terrain, ground surface, and thickness of ground cover.

Reviewed by Tony Gilbert, Chief Remote Pilot, Queensland Drones, CASA ReOC #6466 | Last updated 30 August 2026

The short answer: photogrammetry and LiDAR are both drone-based mapping methods, but they capture data differently and suit different project outcomes. Photogrammetry uses overlapping photographs to build 3D models and is more visually detailed, but it only sees the terrain from above, not what’s underneath; LiDAR uses laser pulses to measure distance directly and is more accurate on vertical elevation (down to 2–3cm with ground control and surveyor verification), works in dense vegetation and isn’t affected by shadows or poor light. In short: choose photogrammetry for open sites where visual detail matters most, and LiDAR for vegetated, large or accuracy-critical sites like corridor mapping, construction earthworks and drone survey or lidar survey projects needing survey-grade terrain data.

Queensland Drones has been delivering topographic drone survey and mapping services since 2016 — the first five years using photogrammetry exclusively, with increasing use of LiDAR mapping over the past five years. So we’ve had extensive experience of both methods and we still use both methods – in fact, we often capture LIDAR and photogrammetry simultaneously and use both data sets to produce the best results for our clients. Here are the 9 differences that actually decide which one you need.

The 9 differences at a glance

Technology: photogrammetry captures overlapping photos (passive, camera-based); LiDAR emits laser pulses and measures their return time (active, laser-based).
Vertical accuracy: photogrammetry typically achieves 15–20cm vertical accuracy; drone LiDAR mapping achieves roughly 10cm without ground control, 5cm with sufficient ground control, and down to 3cm with ground control plus registered-surveyor verification.
Horizontal accuracy: photogrammetry is generally under 10cm horizontally; drone LiDAR mapping achieves roughly 5cm without ground control, 3cm with sufficient ground control, and down to 2cm with ground control plus registered-surveyor verification.
Vegetation penetration: photogrammetry can only capture what the camera sees — dense canopy blocks the ground; LiDAR pulses pass through gaps in foliage to capture true bare-earth terrain underneath.
Lighting conditions: photogrammetry needs good, consistent light and is affected by shadows, glare and cloud cover; LiDAR is an active sensor and works independently of ambient light, including at dawn/dusk.
Data outputs: photogrammetry produces orthomosaics and photorealistic textured 3D meshes; LiDAR produces point clouds, DEMs (digital elevation models) and DTMs (digital terrain models).
Visual detail: photogrammetry delivers full-colour, photorealistic imagery; LiDAR delivers precise geometry with less inherent visual detail, though many of our surveys now pair LiDAR with a synchronised 100MP RGB camera.
Cost: photogrammetry can be a more affordable option as it can be done with lower cost sensors; LiDAR costs more (see our LiDAR mapping cost guide) but can save money overall on sites where photogrammetry alone would need extensive extra ground survey to compensate for vegetation or accuracy gaps.
Processing complexity: photogrammetry typically uses platform or cloud-based processing workflows; LiDAR point cloud processing is more specialised and typically requires more experienced personnel — all of ours is done in-house using a highly skilled team of GIS analysts.

Is LiDAR more accurate than photogrammetry?

For vertical (elevation) accuracy, yes — LiDAR is significantly more accurate, and the exact figure depends on how much ground control and verification is used. Using PPK positioning, our drone LiDAR surveys typically achieve:

No ground control: ~5cm XY / 10cm Z
With sufficient ground control: ~3cm XY / 5cm Z
With ground control plus data checking by a registered surveyor: 2cm XY / 3cm Z

Actual results vary with terrain, ground surface, and thickness of ground cover. By comparison, photogrammetry typically achieves 15–20cm vertical accuracy. This is why LiDAR is the preferred method for engineering design, construction earthworks verification, and any project where vertical precision drives the outcome — and why, for the tightest tolerances, ground control combined with registered-surveyor checking is worth the extra step.

Does LiDAR work in dense vegetation where photogrammetry doesn’t?

Yes. This is the single biggest practical difference between the two. Photogrammetry can only map what the camera can physically see, so dense grass, crops or tree canopy will show up in the model instead of the true ground surface underneath. LiDAR’s laser pulses find gaps in the canopy — even small ones — and enough of them reach the ground to build an accurate bare-earth model. For vegetated sites, river corridors, forested land and rural road, gas pipeline or transmission line corridors, LiDAR is usually the only method that gives you a reliable terrain model.

Which is cheaper, drone photogrammetry or LiDAR?

Photogrammetry is generally the more cost-effective option upfront — it uses simpler equipment and platform-based processing workflows. LiDAR mapping costs more, largely due to the sensor cost and more specialised processing (see our LiDAR mapping cost guide for current day-rate figures). That said, on vegetated or complex sites, photogrammetry’s lower day rate can be offset by the extra ground survey work needed to fill accuracy gaps — so LiDAR is almost always the more cost-effective choice overall, not just the more accurate one. And it’s worth knowing that we can capture photogrammetry images concurrently with LIDAR if required.

How Big is Too Big for Drone LIDAR Mapping?

This is possibly the most contentious question in our industry right now. The largest drone mapping project we’ve undertaken with a single drone team to date is 6000 Hectares (60 square km), conducted in a very remote Western Qld location with very long correction baselines, yet we still achieved an overall accuracy less than 20cm across the entire site. Is there an upper limit? Well it comes down to time and effort. We one team, a site of this size takes about one week to capture and is still cheaper than a manned aircraft LIDAR survey, with significantly better data. With multiple drone teams,. we could cover 100-200 square km in one week. Talk to us, we’ll let you know what’s possible.

Can photogrammetry replace LiDAR for construction surveys?

For open, clear construction sites with minimal vegetation, photogrammetry can be a perfectly adequate and more affordable choice, particularly where visual/photographic detail is also valuable for documentation and stakeholder communication. For sites with vegetation, complex terrain or where vertical accuracy drives engineering decisions — cut/fill calculations, drainage design, earthworks verification — LiDAR is the better fit and, in our experience, the safer choice to avoid costly rework from inaccurate terrain data.

PROs and CONs for Construction Surveys:

	Photogrammetry	LIDAR
Pros	Lower cost; full-colour, photorealistic outputs; faster, well-established processing	Higher vertical accuracy; penetrates vegetation; unaffected by lighting/shadows; better for large or complex sites
Cons	Struggles with vegetation cover; vertical accuracy lower (15–20cm); sensitive to light and shadow	Higher cost; less inherent visual detail; requires specialised processing expertise

When Should I Choose Photogrammetry:

Choose photogrammetry when the site is open and largely clear of vegetation, when photorealistic visual output matters (site documentation, marketing, stakeholder presentations) and when budget is the primary constraint. It’s a strong fit for straightforward topographic mapping, smaller sites and progress photography on active construction sites.

When Should I Choose LIDAR:

Choose LiDAR when the site has vegetation cover you need to see through, when vertical accuracy is critical to the project outcome (engineering design, earthworks, drainage), for large or linear sites like road, gas pipeline and utility corridors, and for any drone survey where ground-truth terrain data will be used for design or legal/engineering purposes. If you’re unsure which applies to your project, contact us with your site details and we’ll help you choose the right method.

Conclusion

Photogrammetry and LiDAR aren’t competitors so much as different tools for different jobs — and in over 10 years of drone mapping, we’ve found the right question isn’t “which is better” but “what does this specific site and project need.” As a CASA-certified operator working with engineers, surveyors and environmental managers using both technologies since 2016, we’ve helped many clients choose the right sensor for their project rather than defaulting to one method for everything. Get in touch or call 1300 246 977 to talk through your site and project requirements.

FAQ

Do I need LiDAR for a small construction site? Not necessarily. For small, open sites with little to no vegetation, photogrammetry is often sufficient and more cost-effective. LiDAR earns its higher cost on larger, vegetated, or accuracy-critical sites.

Does LiDAR work at night or in poor light? Yes — LiDAR is an active sensor that emits its own laser pulses, so it isn’t dependent on ambient sunlight the way photogrammetry is. It performs consistently in overcast conditions, shadows and low light, though standard drone flight rules around daylight operations still apply and concurrent photogrammetry still requires good light.

Can you combine photogrammetry and LiDAR on the same project? Yes. Many of our projects use LiDAR for accurate terrain and vegetation data alongside RGB imagery for visual documentation and orthomosaic mapping — giving you both survey-grade accuracy and photorealistic detail from a single site visit. In fact, we can capture both on a single flight.

How much more expensive is LiDAR than photogrammetry? LiDAR mapping typically costs more per day than photogrammetry due to sensor and processing costs — see our LiDAR mapping cost guide for current figures. The gap has been narrowing as drone LiDAR sensors become more accessible.

How accurate is LiDAR with ground control compared to without? Without ground control, our PPK drone LiDAR surveys typically achieve around 5cm XY and 10cm vertical accuracy. With sufficient ground control this improves to around 3cm XY and 5cm vertical, and with ground control plus data checking by a registered surveyor we’ve demonstrated 2cm XY and 3cm vertical accuracy. Results depend on terrain, ground surface, and thickness of ground cover.

Photogrammetry and LIDAR – The 9 Key Differences