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Redrawing old building drawings

From scanned building drawing to DXF, DWG and 3D

Vecdraft redraws scanned building drawings. You drop in the scans, the program draws the walls, doors, windows and dimensions, and you check the result. You end up with a DXF or DWG on fixed layers, a 3D model and a SketchUp file.

14 days free, 3 projects. For Windows 10 and 11; the program itself is in Dutch. After that € 790 per workstation per year, excluding VAT.

The sheet as Vecdraft redrew it: front elevation, rear elevation, section, ground floor, first floor and joist layout in clean lines.The same sheet as a black-and-white archive copy: a building plan from 1931 with specks, missing ink and a black scanner edge.
Slide: the copy of a building plan on the left, the DXF drawings Vecdraft made from it on the right, after review. The plan was made up for this site; it is not an existing building.

In short

The tracing is done for you, the judgement stays yours

You drop in the scans

PDF, TIFF or an image, and DXF and DWG as well. The program splits a sheet with several drawings into separate ones, and works out the type and the storey of each.

You check what matters

The program points out the places it is unsure about, one at a time. You confirm them or correct them.

You carry on in your own software

You open the DXF or DWG in AutoCAD, BricsCAD, Revit, Archicad or Vectorworks, with a fixed layer structure, line weights to NEN-ISO 128 and hatching to NEN 47. You also get a 3D model and a file for SketchUp.

Not another PDF to DWG converter

Walls, doors and windows instead of loose lines

If you want to digitise an old building drawing, you usually end up with a PDF to DWG converter. A converter like that traces every pixel of the scan: you get thousands of loose, crooked little lines, stains included. Vecdraft vectorises an archive drawing differently: it recognises building elements.

A wall is one wall

With a thickness, a material and the matching hatch. Walls meet properly at the corners, so you can carry on with them in your CAD program.

A door sits in its wall

Doors and windows are openings in a wall, with a width and a swing direction. Dimensions on the drawing become dimension lines.

Everything on its own layer

External walls, internal walls, openings and dimensions each get their own layer with an NL/SfB code. The scan sits underneath as an underlay, so you can compare.

How it goes

Three steps: Tekeningen, Nakijken, Uitvoer

Those are the names you will see in the program: Drawings, Review and Output.

The Drawings screen: the six drawings of the sample project, each with its type and scale.

01

Drawings (Tekeningen)

You drop your scans into the program. It splits combined sheets and labels each drawing with its type and storey.

The Review screen: the floor plan with the redrawn walls and openings, and on the right the list of points to check.

02

Review (Nakijken)

The program redraws the drawing and shows you its doubts. You go through them one by one and fix what is wrong.

The Output screen: cards for the 3D model, DXF or DWG, and SketchUp.

03

Output (Uitvoer)

You pick what you need: DXF or DWG, the 3D model, a SketchUp file.

What you get

A drawing you can keep working on

DXF · DWG

A drawing on fixed layers

Layers named the NLCS way with NL/SfB codes, line weights to NEN-ISO 128 and hatching to NEN 47.

3D · GLB · OBJ

3D model

Vecdraft builds a 3D model of the building from the redrawn drawings, as a GLB and an OBJ file. Vecdraft does not produce IFC yet.

SKP

SketchUp file

With tags, components for the window and door frames, and scenes per storey and per elevation.

Open the result in your own software

Download the sample project: the scanned sheet, the six drawings Vecdraft made from it as DXF and DWG, the 3D model, the SketchUp file and the report. The readme file (in Dutch) lists what was corrected during review.

Download the sample ZIP · 1.5 MB

Who it is for

For people who work on existing buildings

Vecdraft is a Dutch-language program, made for Dutch and Flemish building drawings.

Architects

Start a conversion or extension from a digital drawing of the existing building.

Drafting offices

Spend your hours on checking and finishing, not on tracing.

Contractors

Turn the archive drawing into one you can draw your alterations on.

Structural engineers

A base drawing of the existing building, ready for your own drafting.

For your IT administrator

What happens on your computer

A program for Windows

You install Vecdraft on a computer running Windows 10 or 11. It is not a website you upload drawings to in order to store them there.

Your projects stay with you

Scans, redrawn drawings and output are kept on your own computer. Reviewing and output work without an internet connection.

Reading goes over the internet

To be read, a drawing goes through the Vecdraft service to an AI assistant. What that means for names and addresses on the drawing is explained in the frequently asked questions.

Try it on your own drawings

14 days free, 3 projects. You request the trial with your email address. Nothing renews automatically afterwards.