DT1 → FITS · Windows

Convert DT1 to FITS

Convert DT1 to FITS without installing QGIS or writing ogr2ogr commands. reaConverter reads GIS data directly and works through whole folders in one pass.

DT1 to FITS 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. Works without QGIS or ArcGIS, so GIS data can be converted on any office PC.

DownloadDT1 to FITS ConverterConvert
DT1 to FITS
Online
.dt1.FITS
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .dt1 Files to .fits?

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 DT1 files

Launch reaConverter and drop in your DT1 files. The software queues everything for batch processing with consistent settings.

Add files by dragging them in, browsing folders, or using the right-click menu from Windows Explorer.

Load your DT1 files into reaConverter

3. Select FITS as output format

Choose FITS as the target format. Pick a destination folder or let reaConverter save files alongside the originals.

Select FITS as output format

4. Start DT1 to FITS conversion

Then simply press the Convert button and your conversion will begin in no time!

Start Conversion

Once the conversion is complete, you can find your FITS files in the destination folder you selected.

Step by step

How It Works

reaConverter offers the fastest, simplest solution for converting your DT1 files into FITS without GIS software - all files processed on your PC for maximum privacy and speed.

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Technical note

How DT1 and FITS differ in practice

Every cell in a DT1 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 DT1 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
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
Creating marketing materials for various platforms requires multiple file versions from single sources. reaConverter's workflow automation lets us generate PNG, JPEG, and SVG variants from AI and PSD files simultaneously. The color profile management ensures brand consistency across all outputs, and the processing speed allows for last-minute changes without delaying deadlines.
Rebecca Turner
Rebecca Turner
Marketing Agency CEO

FAQ

DT1 to FITS Conversion

What are DT1 files?

DT1 is the file extension for Level 1 of Digital Terrain Elevation Data (DTED), a standardized elevation product described in the MIL-PRF-89020 specification of the U.S. National Geospatial-Intelligence Agency (NGA). Each file represents a one-degree by one-degree geographic cell and contains terrain heights sampled at a regular interval of 3 arc-seconds, equal to approximately 90 to 100 meters at the equator. Level 1 sits between the coarser Level 0 (.dt0) and the finer Level 2 (.dt2) products, and serves as a common choice for regional terrain analysis, flight planning, line-of-sight studies, and mapping at medium scales. The file starts with header records that identify the cell, its origin, and its accuracy, followed by the matrix of elevations. The format is a long-established standard in defense, aviation, and civil geospatial work.

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 DT1 to FITS?

Yes! reaConverter instantly converts .dt1 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 DT1 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 DT1 to FITS online?

If you only need to convert a few DT1 files to FITS format, feel free to try our free online free online DT1 to FITS converter — perfect for small batches with no installation needed!

How can I turn DT1 files into FITS on my computer?

The best way to change DT1s 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 DT1 to FITS.

How can I automate DT1 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 DT1 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 dt1 to fits converter for batch processing.

What else can I do with reaConverter?

Convert RAW photosConvert DICOM filesCrop photoConvert medical imagesPicture resizer

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