SDAT → FITS · Windows

Convert SDAT to FITS

SDAT to FITS for whole archives of tiles, layers or survey files at once, with nothing uploaded and no account required.

Got a folder full of SDAT files? reaConverter batch converts them to FITS in minutes, not hours. Local processing means instant results, even with thousands of files. Surveyors and planners use it to pass GIS data to colleagues who work in other software.

DownloadSDAT to FITS ConverterConvert
SDAT to FITS
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.sdat.FITS
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .sdat Files to .fits?

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting SDAT files in under two minutes.

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Install reaConverter

2. Load your SDAT files

Add your SDAT files to reaConverter. Whether it's a handful or an entire archive, the batch engine processes them efficiently.

Browse for files, drag them in, or add entire folders at once. reaConverter queues everything automatically.

Load your SDAT files into reaConverter

3. Select FITS as output format

Pick FITS as the output format. If the data is going back into a GIS, choose a format that keeps coordinates and attributes; JPG, PNG and PDF suit maps for reports and slides.

Select FITS as output format

4. Start SDAT to FITS conversion

Start the conversion with one click. reaConverter handles everything and notifies you when it's done.

Start Conversion

When the batch finishes, your FITS files are ready in the destination folder you chose earlier.

Step by step

How It Works

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

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Technical note

SDAT to FITS: what carries over and what does not

Every cell in an SDAT file holds a measurement rather than a colour, usually elevation in metres, running from sea level up to whatever the highest point in the tile happens to be. FITS stores brightness, so the conversion stretches that range across a grey or colour scale. What you get is a readable picture of the terrain, and it is the right thing for a relief map or a figure. What you no longer have is the data: sampling a pixel in the FITS returns a shade, not an altitude. Missing cells in an elevation grid, such as water, radar shadow or the edge of a survey, are not empty: they hold a sentinel value, -32768 in SRTM, -32767 in DTED and very often -9999 in ESRI grids. Counted as a real height, that value stretches the scale so far that the actual terrain collapses into a few near-identical shades. When a FITS output looks flat and washed out, a void treated as data is the usual cause.

Map Data Workflow

Turn GIS data into something anyone can open

A map saved as FITS opens on any computer and any phone. reaConverter produces those from SDAT in batch, entirely offline.

  • Render every file in a folder to FITS with the same size and settings
  • Set DPI and output dimensions before the run, not afterwards
  • 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
Essential for our astroimaging pipeline! reaConverter perfectly handles FITS files from our research telescope, preserving all WCS coordinates and photometric data during batch conversion to TIFF. Now we process 100+ deep-sky exposures nightly without losing critical metadata for our exoplanet studies!
Joseph Wilson
Joseph Wilson
Satisfied Customer
reaConverter makes FITS conversion incredibly easy. We batch convert astronomical images to standard formats for presentations and analysis, all automated through the command-line. It’s fast, reliable, and handles large datasets without issues.
Laura N.
Laura N.
Astrophysics Research Assistant
Finally an app that actually opens my weird files! Saves me from format frustration daily.
Kyle Brooks
Kyle Brooks
Happy User
This converter delivers exceptionally quick format conversions with reliable results every time.
Brian White
Brian White
Happy User
Security was our top concern when evaluating file conversion tools. reaConverter’s offline mode and role-based access controls let us lock it down for sensitive environments. No unexpected network calls or bloat — just clean, fast conversions. Even passed our pen-testing scans without a hitch.
Marcus White
Marcus White
Healthcare IT
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

FAQ

SDAT to FITS Conversion

What are SDAT files?

SDAT is the data file of the SAGA GIS grid format. SAGA (System for Automated Geoscientific Analyses) is a free, open-source GIS widely used for terrain analysis, hydrology, soil science, climate studies, and other geoscientific work. A grid in this format is a map made of equal square cells, such as an elevation model, with one value in each cell. The .sdat file holds only these values in binary form, while a small text file with the same name and the .sgrd extension describes them: the size of the grid, its position, the cell size, the type of numbers, and the value that marks missing data. A history file with the .hgrd extension and a projection file with the .prj extension may accompany them. SAGA can also pack all of these files into one archive.

What are FITS files?

The FITS (Flexible Image Transport System) format is a standard format used particularly for storing, transferring and processing scientific images from fields such as astronomy. FITS was first launched as an open standard in the early 1980s and has gone through several subsequent upgrades. FITS files contain not just images, but also data related to photometry and spatial calibration, and information about the origin of the image. Similar formats include FIT and FTS.

Can reaConverter convert SDAT to FITS?

Yes! reaConverter instantly converts .sdat to .fits 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 SDAT to FITS 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 SDAT to FITS online?

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

How can I turn SDAT files into FITS on my computer?

The best way to change SDATs to FITSs 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 SDAT to FITS.

How can I automate SDAT to FITS 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 SDAT files to FITS using the command prompt?

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

What else can I do with reaConverter?

Convert vector filesChange image DPIConvert RAW photo formatsChange format settingsCopy IPTC data

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