Choosing a tool

RoomPlan vs photogrammetry: two different jobs

A mesh is a picture of a room. A room is walls, openings and dimensions. Only one of them can be taken off.

What each one gives you

Photogrammetry reconstructs a three-dimensional surface from many overlapping photographs. What comes out is a mesh — an extremely detailed skin of whatever you photographed, with no opinion about what any of it is.

Apple’s RoomPlan takes depth and motion data and produces something different in kind: a room made of identified objects. Walls with dimensions. Doors. Windows. Openings. Furniture, labelled.

Why "it knows what a wall is" is the whole difference

A takeoff needs a perimeter, a ceiling height, and a list of openings to deduct. A mesh has none of those as data — you can measure across it in a viewer, but there is nothing in the file that says "this is a wall, it is 12 ft 4 in long, and there is a 3 ft door in it".

That is why estimating tools built on interiors use RoomPlan or something like it, and why photogrammetry sits alongside as a record rather than as a measurement.

Where photogrammetry is genuinely better

• Exteriors — roofs, elevations, anything you cannot walk around inside.
• Condition records where the detail IS the point: a damaged surface, a texture, a crack.
• Objects rather than spaces.
• Anywhere you need to show what something looked like rather than how big it was.

And the caveat both share

Both produce geometry that looks authoritative and neither one measured your wall with a tape. Whatever the capture method, the number you put on a contract should have had a physical measurement behind it — which is why Trueline records the method against every length and says so on the page.

Capture time, and what that does to a job

This is the practical difference more often than the technical one. A RoomPlan-style walk is about ninety seconds and you watch the room build as you go, so you know on the spot whether it worked. Photogrammetry is a careful photographic pass followed by processing, and you find out whether it worked later — sometimes after you have left.

On a job where you are measuring six rooms, that difference decides which one you actually use.

Using both on the same job

1. Walk each room for its geometry

   Shape, openings, and the quantities you will price off.

2. Photograph what the geometry cannot carry

   Condition, damage, texture, the state of a surface. This is where detail matters and where a mesh or a good set of photographs earns its place.

3. Keep them attached to each other

   A photograph that is not tied to a wall in a room is a photograph nobody can locate six weeks later.

That last step is the one that gets skipped, and it is why so many claim files are an email with thirty attachments. Trueline attaches each photograph to the damage it belongs to and prints them beside the measurements on one document.

Questions people ask

Is RoomPlan the same as photogrammetry?

No. Photogrammetry reconstructs a surface from photographs and has no idea what any of it is. RoomPlan produces identified objects — walls with dimensions, doors, windows and openings — which is what a takeoff needs.

Can you take off quantities from a 3D mesh?

Not directly. You can measure across a mesh in a viewer, but there is nothing in the file identifying a wall, its length or the openings in it, so there is nothing to deduct or total.

Which should I use for insurance documentation?

Both, for different parts. RoomPlan-style capture for the room and its measurements, and detailed photographs — or photogrammetry where the detail matters — as the condition record. An adjuster needs both the size and the state.

Which is faster, RoomPlan or photogrammetry?

RoomPlan-style capture, by a wide margin — about ninety seconds a room, and you watch it build as you walk so you know immediately whether it worked. Photogrammetry needs a careful photographic pass and then processing, so you find out later.

Can I use both on the same job?

That is the sensible answer: capture the geometry for measurement, and photograph or scan in detail for condition. What matters is keeping them attached — a photograph not tied to a wall in a room is one nobody can locate later.

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Where this fits with Trueline

Trueline is an iPhone app that measures a room, takes it off, prices it from your own rate book and turns it into a proposal — with every length carrying whether it was scanned, drawn or measured, right onto the document a client reads. See how it works, or take the free templates and use them with whatever you already have.

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