BT → IGES · Windows

Convert BT to IGES

Need BT data as IGES for someone without GIS software? reaConverter handles the conversion offline and in bulk.

reaConverter transforms BT files to IGES quickly and reliably. Drag in folders, set your options, click Convert, done. No cloud accounts, no file uploads, no complicated setup. Just install and start converting. No command line and no scripting, unlike the usual ogr2ogr route.

DownloadBT to IGES ConverterConvert
BT to IGES
Online
.bt.IGES
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .bt Files to .iges?

1. Download and Install reaConverter

First, grab reaConverter from the download button below. Installation is fast, and the software runs offline — no account or signup needed.

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Install reaConverter

2. Load your BT files

Load your BT files into reaConverter. You can add individual files or point to folders, and the software will queue everything automatically.

Select BTs from a folder or drag-and-drop them directly into the reaConverter window.

Load your BT files into reaConverter

3. Select IGES as output format

Pick IGES as output format and choose the destination folder where you want to save new .iges files.

Select IGES as output format

4. Start BT to IGES conversion

Press the Convert button and reaConverter takes care of the rest. Processing time depends on file size and volume.

Start Conversion

After processing, find all your new .iges files in the output location. The log shows details for each conversion.

Step by step

How It Works

reaConverter offers the fastest, simplest solution for converting your BT files into IGES without GIS software - all files processed on your PC for maximum privacy and speed.

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Technical note

How BT and IGES differ in practice

Geospatial coordinates are absolute positions on the earth, and they are large: a projected easting runs to six or seven digits, while latitude and longitude are small decimals. IGES expects a drawing laid out near its own origin in millimetres or inches. The geometry itself converts correctly, but it can land tens of kilometres from 0,0, or arrive at a scale where an entire county is forty units across. Zoom to extents first, then measure one known distance before dimensioning anything. A line in a BT image is several pixels wide, so tracing it can mean different things and the mode is yours to choose. Centreline returns a single line running down the middle of each stroke, which is what a scanned drawing needs: one entity per line, snappable and dimensionable, rather than a long thin rectangle around it. Outline follows both edges and returns closed shapes, which suits clipart, logos and anything that will be filled or cut. A precision setting controls how closely the traced paths follow the pixel edges. One thing to plan for: vectorised output from this path is black and white, so colour in the BT does not survive as colour in the IGES.

Map Data Workflow

From map data to a working drawing

Site plans, utility routes and parcel boundaries often start out as BT and end up in IGES. reaConverter turns the layers into drawing entities in batch, so a full project folder moves across in one run.

  • Convert every layer in a folder to IGES with the same settings
  • Go the other way too, from DWG to Shapefile, when the GIS team needs the drawings back
  • Render the same data to PDF for a quick review copy
  • Pick up new data automatically with Watch Folders, or script the job from the command line

Everything runs on your PC, which matters for cadastral, utility and client data that should not pass through an upload form.

GIS data conversion

User reviews

What people say after the first batch

Average User Rating:4.8
Last updated on September 13, 2026
An excellent program! I use it regularly in my work - it supports nearly every file format imaginable. The interface is intuitive and runs flawlessly every time.
Roger Cook
Roger Cook
Happy User
For agencies handling confidential data, reaConverter eliminates cloud-upload risks while delivering unmatched conversion reliability. Our team uses it both in-office and remotely with identical results.
Jamal Bailey
Jamal Bailey
Satisfied Customer
Our volunteer team uses reaConverter to prepare images for fundraising campaigns. The learning curve was minimal, and the results are professional-grade. The customer support team even helped us customize a workflow — fantastic service!
Jason P. Bailey
Jason P. Bailey
Non-Profit Coordinator
Your solution was buried deeper in search results than it should be. After struggling with unclear alternatives, I found your guides — finally, instructions that made sense for a first-time user like me. Excellent work!
Richard E. Miller
Richard E. Miller
Satisfied Customer
Converts files in seconds! Finally a tool that's both fast and simple to use.
Wei Chen
Wei Chen
Happy User
I'd been searching for reliable conversion software forever — reaConverter has everything I need! After installing and watching the tutorial, I had my files converted to the perfect format in minutes. Flawless experience!
Sanjay Mehta
Sanjay Mehta
Satisfied Customer

FAQ

BT to IGES Conversion

What are BT files?

BT is a binary terrain format developed by Ben Discoe for the Virtual Terrain Project (VTP) to store regular elevation grids used in 3D terrain visualization and simulation. A file of this type consists of a fixed 256-byte header followed by an uncompressed array of elevation samples, stored as 16-bit integers, 32-bit integers, or 32-bit floating-point numbers. The header carries the grid dimensions, sample size, horizontal units, geographic extents, datum, and, for projected data, a UTM zone, while a complete projection definition may be supplied in an accompanying .prj file. Elevation samples are written column by column, starting from the western edge and moving south to north within each column. The format is used to exchange digital elevation models between terrain-building tools and visualization software, and is often distributed in a gzip-compressed .bt.gz form.

What are IGES files?

IGES (Initial Graphics Exchange Specification) is a widely used file format for exchanging 2D and 3D CAD data between different design and engineering software. It supports wireframe, surface, and solid models, making it a common standard in mechanical, aerospace, and automotive industries.

Can reaConverter convert BT to IGES?

Yes! reaConverter instantly converts .bt to .iges with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.

What is reaConverter used for?

reaConverter is a Windows converter for 800+ formats, GIS data among them. For BT to IGES it replaces the usual detour through QGIS, ArcGIS or ogr2ogr: add the files, pick the output format, and the whole batch converts offline. Surveyors, planners and engineering teams use it to pass data between GIS, CAD and everyday document formats.

Why choose offline conversion with reaConverter?

reaConverter is a software program that is used for offline files conversion. Your proprietary documents never leave your computer – essential for architects, engineers, healthcare and government contractors handling classified projects. Meets GDPR, HIPAA, CCPA, and corporate security policies by ensuring files never cross borders or third-party systems.

Can I convert BT to IGES online?

If you only need to convert a few BT files to IGES format, feel free to try our free online free online BT to IGES converter — perfect for small batches with no installation needed!

How can I turn BT files into IGES on my computer?

The best way to change BTs to IGESs on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from BT to IGES.

How can I automate BT to IGES files conversion?

reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.

Is there a way to convert BT files to IGES using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line bt to iges converter for batch processing.

What else can I do with reaConverter?

Convert RAW filesConvert raster to vectorChange bit depthConvert CAD formatsChange file creation date

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