TER → IGS · Windows

Convert TER to IGS

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

Manual TER to IGS conversion wastes hours. reaConverter automates the process — just add files and click Convert. Everything happens offline on your computer. No uploads, no cloud risks. Survey and cadastral data stays on your machine, with no upload at any point.

DownloadTER to IGS ConverterConvert
TER to IGS
Online
.ter.IGS
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .ter Files to .igs?

1. Download and Install reaConverter

Download reaConverter and install it in seconds. The setup is straightforward — no complex configuration, no extra software required.

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Install reaConverter

2. Load your TER files

Open reaConverter and add your TER files. You can load individual files, entire folders, or even nested subfolders.

Drop your TER files into the window or use File menu to browse and select folders.

Load your TER files into reaConverter

3. Select IGS as output format

Choose IGS for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.

Select IGS as output format

4. Start TER to IGS conversion

Hit Convert and let reaConverter do the work. The progress window shows status for each file in real time.

Start Conversion

After conversion, find your IGS files in the output folder. Click 'Show converted files' to open it directly.

Step by step

How It Works

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

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Technical note

TER to IGS: what carries over and what does not

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. IGS 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. TER is made of pixels and IGS stores geometry, so the conversion traces the image into real lines, arcs and polylines. The result is editable in CAD: entities can be selected, snapped to and measured, rather than a bitmap wrapped inside an IGS container, which is what a viewer or a lightweight converter usually produces. It is still derived geometry, so expect contours rather than a structured drawing. Dimensions, blocks and meaningful layer names were never in the TER to begin with.

Map Data Workflow

From map data to a working drawing

Converting TER to IGS usually means handing GIS data to someone who works in CAD. reaConverter makes that hand-off without a GIS seat on either side, for one layer or a whole delivery.

  • Convert every layer in a folder to IGS 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 28, 2026
We deployed reaConverter across our department to standardize file formats for our archives. The command-line support and automation features integrated perfectly into our systems. Stellar performance and zero crashes—it just works.
David R.
David R.
IT Solutions Architect
So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!
Kenneth D. Carter
Kenneth D. Carter
Satisfied Customer
I run a small design agency, and reaConverter has saved me countless hours. The batch processing is lightning-fast, and the ability to convert hundreds of files into different formats at once is a game-changer. Highly recommend!
Mark T.
Mark T.
Satisfied Customer
The step-by-step video makes conversion foolproof. I'd recommend this to my grandma - it's that well-explained!
DeShawn M. Thompson
DeShawn M. Thompson
Happy User
I'm really impressed with this software - it converts files between formats incredibly fast!
Lin Zhang
Lin Zhang
Happy User
I firmly believe working with JPEG — the universal format supported by all devices and apps—is the wisest choice. reaConverter handles these conversions flawlessly.
Ava Thomas
Ava Thomas
Happy User

FAQ

TER to IGS Conversion

What are TER files?

The TER file format is associated with Terragen, a program specialized in creating 3D landscape images, models and animations, developed by Planetside Software. TER files are also known as "terrain files", as they contain data that helps create 3D scenery. They can be created using the Terragen software on both Microsoft Windows and Mac OS X platforms.

What are IGS files?

The IGS (Initial Graphics Exchange Specification) file format is a standardized CAD data exchange format used to transfer 2D and 3D model data between different CAD systems. Developed in the 1980s, IGES ensures compatibility across various engineering and design software by storing geometric data, annotations, and structure in a neutral ASCII or binary format.

Can reaConverter convert TER to IGS?

Yes! reaConverter instantly converts .ter to .igs 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 TER files 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 TER to IGS 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 TER to IGS online?

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

How can I turn TER files into IGS on my computer?

The best way to change TERs to IGSs 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 TER to IGS.

How can I automate TER to IGS 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 TER files to IGS using the command prompt?

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

What else can I do with reaConverter?

Convert PDFAdd watermark on imageConvert CAD formatsSet file dateConvert vector images

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