A pale quarry face with scrub and paths in front, woods and a city in haze behind, under a cloudy sky. The quarry is from a real drone flight processed by OJAS 4D; the surroundings and sky are illustrative.

Maps you can measure. Numbers you can defend.

Upload your drone photos. Get a 3D map you can measure, and see how sure every volume is.

Start free Try the live demo

2 free flights. No card needed.

Scroll to watch the tutorial

Tutorial

From flight to files: a 2:30 min video.

Tutorial cover: Fly. Upload. Measure. The OJAS 4D app showing the quarry as a 3D map, three of the drone photos, and a volume with how far off it could be.
Transcript

With OJAS 4D, the photos from one drone flight become a 3D map you can measure. Here's how it works, from start to finish.

Start in the field. Fly a simple grid over your site, with the camera pointing straight down and 70–80% overlap between photos, front and side.

Then create your account. It's free to start: two flights of up to 200 photos each, and no card needed.

Drop in the photos from your flight. Before anything is sent, they're checked right in your browser: how many there are, their size, the camera, and their location. So a bad upload is caught in seconds.

Next, OJAS 4D builds your site in 3D, in the cloud. A flight like this quarry, 225 photos, takes about an hour. You don't need to watch it. The Flights page shows where it is.

When it's ready, open the map. Your photos become one map of the site, true to scale: five centimetres to a pixel here. And you can turn it in 3D.

To measure, pick a tool and click on the map. Draw a line, and you get its length, how much it rises, and its slope. Open the profile to see the ground along it.

Draw around a pile or a pit, and you get its volume. Right next to the number, you see how far off it could be. For this rock bowl, 66 to 199 cubic metres, an estimate. Every volume says how sure it is.

And if you draw where your photos didn't reach, it won't guess. It tells you why, instead of making up a number.

When you're done, download all five files: the map, the surface and terrain models, the point cloud, and the 3D mesh. They're standard formats, for your GIS, CAD and survey software.

Fly it. Upload it. Measure it. Start free at ojas4d.com.

How it works

From photos to a 3D map.

  1. 01

    Fly

    Take overlapping photos from above.

  2. 02

    Upload

    Drop them into your browser.

  3. 03

    Map

    One sharp, to-scale map of the whole site.

  4. 04

    3D

    Every height, in colour, in 3D.

One of the drone photos, looking straight down at grass, paths and pale rock.
The quarry seen from above, with the drone's flight path and the 225 places it took a photo drawn over it.
The finished map of the quarry: pale rock faces, paths, scrub and a long building.
The same ground as shaded relief, coloured from dark teal for the lowest ground to pale sand for the highest.
The quarry face in 3D, built entirely of coloured points: pale rock, green scrub and trees, a footpath.

The workspace

Measure in your browser.

Click to draw. Get the number.

The OJAS 4D workspace on the quarry flight: a volume selected on the map, its figure and how sure it is in the panel on the right.
  • Distance
  • Area
  • Volume
  • Height
  • Profile
Try it yourself
86.42 m 249.52 m Rock bowlcut 463.0 m³fill 4,545.0 m³

Measure

Real numbers, on your real map.

Lines, areas and volumes, measured on the map itself.

LineUp the quarry face
Length
86.42 m
Rise
+28.06 m
Slope
18.0°
Elevation profile metresrelative heights
255.84237.14218.4404386 m
VolumeRock bowl

−4,082.0 m³ net

Could be off by 66–199 m³ estimate

Draw your own

How sure

Every volume says how sure it is.

Next to each volume you see how far off it could be. So you know when to trust it.

Rock bowl

−4,082.0 m³

could be off by 66–199 m³

  • ±66 m³ if heights are off by 5 cm
  • ±199 m³ if off by 15 cm

We test it on flat ground.

Flat ground should measure zero. The range caught it three times out of four. It missed on water.

How accurate is it?

1–3× the pixel size

Lengths and heights within your map. 5–15 cm on this quarry.

2–6 m

Where the map sits on Earth, without ground markers.

Heights are relative to the flight. Ground markers are coming soon.

When it can’t

No data, no guess.

If your photos don’t cover an area, OJAS 4D tells you why instead of making up a number.

See it in the demo
VolumeOff the edge

Volume

Not produced

100.0% of the area inside the boundary has no elevation data — a volume over holes would be a guess. Shrink the boundary to covered ground.

Not yet

  • Water and glassKeep boundaries off them.
  • Comparing two flightsIn development.
  • Ground markersComing soon.
  • Textured 3D meshNot yet.

What you get

Five files. Open them anywhere.

Standard formats for your GIS, CAD and survey software.

  1. 01

    Orthomosaic

    One sharp, to-scale photo of the site.

    GeoTIFF

    The orthomosaic at full resolution: the pale quarry face, the path along its rim, grass above and trees below.
  2. 02

    Surface model

    The height of everything: ground, trees, roofs.

    GeoTIFF

    The surface model of the same ground, shaded and coloured by height: the face a band of shadow, trees as bumps below it.
  3. 03

    Terrain model

    The bare ground.

    GeoTIFF

    The terrain model of the same ground, shaded grey, with contour lines bunched along the quarry face and square filled-in patches under the trees below it.
  4. 04

    Point cloud

    Millions of 3D points, in colour.

    LAZ

    The quarry face seen at an angle from the south-west, built entirely of coloured points: pale rock, green scrub and trees, a footpath.
  5. 05

    3D mesh

    The site as a 3D surface.

    OBJ

    The same view as a plain grey surface: the quarry face, the pit below it and trees as rounded lumps, lit from the left.

Pricing

Simple monthly pricing.

Start free. Upgrade when you need more flights.

Trial

₹0

Try it on a real site

  • 2 flights
  • Up to 200 photos each
  • Every file and measurement

Solo

₹4,799 a month

For one operator

  • Up to 60 flights a month
  • Every file and measurement

Pro

₹11,999 a month

For teams

  • Up to 200 flights a month
  • Ask OJAS: ask about your sites in plain words

Scale

₹36,099 a month

For survey firms

  • Up to 600 flights a month
  • Priority processing and a named contact
Start free

Flying more than 850 photos in one flight? Write to us first. Prices in Indian rupees, GST included: what you see is what you pay. Billed monthly.

FAQ

Before you start.

Something else? info@celesticlabs.org

Which drones work?

Any drone whose photos keep their GPS location. Upload the original files, not edited ones.

How should I fly?

Fly a grid with 70–80% overlap, camera pointing straight down.

How long does it take?

It depends on the number of photos. The 225-photo quarry on this page took about an hour.

Can I open the files in my software?

Yes. They are standard GeoTIFF, LAZ and OBJ files.

Are the heights absolute?

Not yet. Heights are relative to the flight: right for differences within the map, not for absolute elevation. Ground markers are coming soon.

Is the demo real?

Yes. It is a real flight processed by OJAS 4D. Draw your own measurements; nothing is saved.

Fly it. Upload it. Measure it.

2 free flights. No card needed.

Start free Try the live demo