SDAT → CAL · Windows

Convert SDAT to CAL

Online GIS converters cap file size and need an upload. reaConverter converts SDAT to CAL locally, whatever the size of the dataset.

Batch SDAT to CAL conversion doesn't have to be complicated. reaConverter processes entire folders with consistent quality settings. Works offline with no internet required, so you can convert anywhere, anytime. Survey and cadastral data stays on your machine, with no upload at any point.

DownloadSDAT to CAL ConverterConvert
SDAT to CAL
Online
.sdat.CAL
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .sdat Files to .cal?

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 SDAT files

Open reaConverter and import your .sdat 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 SDAT files into reaConverter

3. Select CAL as output format

Select CAL from the output format list and set your destination folder. You can also adjust quality and compression settings.

Select CAL as output format

4. Start SDAT to CAL conversion

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

Start Conversion

Conversion complete? Your CAL 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 SDAT files into CAL without GIS software - all files processed on your PC for maximum privacy and speed.

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Technical note

SDAT to CAL: 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. CAL 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 CAL returns a shade, not an altitude. SDAT carries georeferencing: a coordinate reference system, and the real-world position and ground size of every pixel. CAL has nowhere to record any of that. The picture transfers intact, the location does not, so the output cannot be dropped onto a map afterwards without being placed by hand. Keep the SDAT original if the data still has to go back into a GIS.

Map Data Workflow

Turn GIS data into something anyone can open

Not everyone who needs to see SDAT data has GIS software. reaConverter renders it to CAL for a report, an email or a slide, and handles a whole folder in one run.

  • Render every file in a folder to CAL 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
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
An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness.
Elena Anderson
Elena Anderson
Happy User
Enable shell integration for lightning-fast file conversions directly from Windows Explorer.
R. Lewis
R. Lewis
Happy User
After 200+ conversions on my budget laptop (i3-1115G4/4GB RAM/Win11), reaConverter outperforms heavyweight tools. Zero crashes, low CPU usage during batch processing, and no internet dependency - exactly what professionals need.
Walter Morgan
Walter Morgan
Satisfied Customer

FAQ

SDAT to CAL 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 CAL files?

A CAL image file represents a monochrome bitmap image that uses the CALS raster image standard for storing graphics data. This standard was created in the 1980s by the US Department of Defence as a compressed interchangeable image format. CAL and CALS are extensions used for similar purposes.

Can reaConverter convert SDAT to CAL?

Yes! reaConverter instantly converts .sdat to .cal 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 CAL 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 CAL online?

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

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

The best way to change SDATs to CALs 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 CAL.

How can I automate SDAT to CAL 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 CAL using the command prompt?

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

What else can I do with reaConverter?

Convert PDFAdd watermark on imageConvert microscopy filesResize imagesConvert DICOM images

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