ERS → IGS · Windows

Convert ERS to IGS

ERS to IGS offline, so survey, cadastral and client data never goes through an upload form. No file size limit and no per-file quota.

ERS to IGS conversion is faster with the right tool. reaConverter handles everything from a few files to thousands in one batch. Processes files consistently every time, with full control over quality and output settings. Survey and cadastral data stays on your machine, with no upload at any point.

DownloadERS to IGS ConverterConvert
ERS to IGS
Online
.ers.IGS
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .ers Files to .igs?

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately.

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Install reaConverter

2. Load your ERS files

Open reaConverter and import your .ers files. No file limits, no slowdowns. Add as many as you need.

Drag files into the window, use the Add Files button, or select entire folders.

Load your ERS files into reaConverter

3. Select IGS as output format

Set IGS as output format and select where to save your converted files. Customize quality settings if needed.

Select IGS as output format

4. Start ERS to IGS conversion

Hit Convert to process your files. The log window shows progress, timing, and status for every file.

Start Conversion

Conversion complete? Your IGS files are saved to the destination folder, ready to use.

Step by step

How It Works

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

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Technical note

How ERS and IGS 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. 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. An ERS file has a pixel count and a DPI value, and no real-world size at all. IGS is a drawing where one unit means one millimetre or one inch, so the conversion has to assign a scale. Set the DPI before the run rather than resizing afterwards, then measure one feature of known length in the output and scale the drawing once to match it. Everything downstream, from dimensioning to cutting, rests on that single check.

Map Data Workflow

From map data to a working drawing

Converting ERS 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 13, 2026
An ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!
Logan B.
Logan B.
Satisfied Customer
I use the online converter — it’s quick and hassle-free!
Jian Wong
Jian Wong
Happy Online User
Working in a print studio means constantly juggling obscure file formats. I used to waste hours Googling converters or installing random software — until reaConverter became my Swiss Army knife. Install it once, and you're set forever. No internet? No problem!
Helen Evans
Helen Evans
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

ERS to IGS Conversion

What are ERS files?

ERS is the header file of the ER Mapper raster format, developed for the ER Mapper image processing software, now part of ERDAS. A dataset of this type consists of two files: a plain-text header with the .ers extension and a binary data file with the same base name and no extension. The header describes the data in a structured, readable form, including the number of lines, cells, and bands, the data type of the pixels, the cell size, the byte order, and the coordinate system. The data file stores the pixel values themselves, without compression. The format is used for satellite and aerial imagery, geophysical grids, and elevation models, particularly in mining, exploration, and remote sensing, and it is recognized by many mapping and geoscience programs.

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 ERS to IGS?

Yes! reaConverter instantly converts .ers 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 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 ERS 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 ERS to IGS online?

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

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

The best way to change ERSs 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 ERS to IGS.

How can I automate ERS 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 ERS 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 ers to igs converter for batch processing.

What else can I do with reaConverter?

Convert Gerber imagesChange image color spaceConvert CAD formatsSet file dateConvert vector images

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