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STEP 1:

Mastermap DXF or DWG Importing
Reference | Vectorworks Mastermap Import

STEP 2

Mastermap select relevant file
Reference | Vectorworks Mastermap DXF or DWG Importing

STEP 3 & 4

OS Mastermap - select relevant units
Reference | Vectorworks Mastermap DXF or DWG Preferred units

STEP 5

OS Mastermap - sizes displayed in millimeters

STEP 6

Mastermap - units can be changed via the pull-down

Frequently Asked Questions — Using OS CAD Data in Vectorworks

What file formats can I import into Vectorworks?

The OS CAD data provided by UK Map Centre is available in DXF and DWG formats, both of which can be imported directly into Vectorworks. Our Import Guide explains the correct method to bring these formats in cleanly.

What units and coordinate settings should I use?

OS vector data is drawn in metres using a defined projection (the British National Grid). Ensure your Vectorworks document units are also set to metres, and that the coordinate system aligns with the OS National Grid. Incorrect units or projections can cause scale or alignment issues.

Why might my imported map appear distorted or misaligned?

Common reasons include mismatched drawing units, incorrect projection, improper import scaling, or layer order issues. Always check the import settings and verify that the coordinate system and extent match your site plan.

I’ve imported the DWG/DXF, but the layers are confusing — what should I do?

OS CAD data is layered for clarity (e.g., buildings, boundaries, roads). In Vectorworks you can toggle layer visibility, hide layers you don’t need, or reorganise them to suit your workflow. Simplifying the layers can help prepare a cleaner file for design or planning work.

Can I use imported OS data for planning submissions or official drawings?

Yes — provided you follow the Ordnance Survey licensing terms (supplied via UK Map Centre) and confirm the data is correctly scaled, referenced, and aligned. Using the official OS base mapping ensures accuracy and credibility in planning and design submissions.

I’m working at scale (e.g., 1:500) — how do I ensure the OS data is correct?

After importing the OS CAD file, set your Vectorworks sheet or viewport scale to match your intended output (e.g., 1:500). Verify that boundaries and features align with the OS base map by checking key dimensions like building widths or site extents.

What if the OS data uses a different projection than my drawing?

You can still use it — but ensure Vectorworks either transforms the data correctly or is set to accept the OS coordinate system. Projection mismatches are one of the most common causes of misalignment after import.

What’s the difference between OS raster and vector data in Vectorworks?

Raster mapping is an image backdrop — good for context but not editable. Vector CAD data (DXF/DWG) is fully editable and layered, letting you manipulate, style, and integrate roads, boundaries, or buildings directly in your drawing.

Who should I contact if I have problems importing OS data?

If you still have trouble after following the guide, contact UK Map Centre support. Include details like your Vectorworks version, OS data format, units, coordinate system, and what issue you encountered so our team can assist effectively.

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