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BT Converter
Batch convert BT files with the same settings across a whole project, from a handful of layers to an archive of tiles.
How to Convert .bt Files in Bulk
1. Install reaConverter
2. Select BT Files
3. Start Conversion
Step by step
See It in Action
For quick and effortless BT file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.
GIS Toolkit
Do more with your GIS data
Need BT data as something anyone can open? reaConverter renders imagery and elevation grids into standard images and documents without QGIS or ArcGIS, and works through whole folders in one pass.
- Render imagery, elevation grids and scanned charts to TIFF, PNG, JPG or PDF
- Resize, crop and set DPI on the output in the same run
- Bring tiles, scenes and grids from many sources into one consistent format
- Convert incoming survey and field data automatically with Watch Folders
- Script GIS conversions from the command line for pipelines and scheduled jobs
- Keep cadastral, utility and client data on your PC: nothing is uploaded
User reviews
From those who tried it
Average User Rating:Last updated on July 28, 2026
Questions & Answers
BT files: Frequently Asked Questions
What are BT files?
BT (VTP Binary Terrain) is a compact elevation grid format created for the Virtual Terrain Project for fast loading of heightfields in real-time 3D engines. The file begins with a 256-byte little-endian header containing a "binterr" signature, version number, column and row counts, sample size of 2 or 4 bytes, floating-point flag, horizontal unit code, UTM zone, datum, extents stored as doubles, and a vertical scale factor. Elevations follow as a raw column-major matrix, running west to east and south to north within each column, with -32768 conventionally marking missing integer data; an optional .prj sidecar overrides the embedded projection. Conversion to graphics requires transposing this layout into row-major image order, applying the vertical scale, and rescaling elevations to an 8-bit or 16-bit grayscale heightmap, a hypsometric color ramp, or shaded relief in PNG, JPEG, or TIFF, while GeoTIFF retains floating-point values and georeferencing. Supported by VTBuilder, Enviro, Global Mapper, and QGIS.
Can reaConverter open BT files?
reaConverter fully supports the BT file format – open, edit, and export BT files to any other popular file format with ease.
Do I need QGIS or ArcGIS to convert BT files?
No. reaConverter reads BT files on its own, so the conversion needs no GIS installation and no licence. It handles whole folders at once, which suits survey archives, tile sets and data deliveries that have to reach people working in other software.
How do I change BT to another format?
reaConverter is a user-friendly tool for converting BT files. Once installed on your computer, it allows you to convert all your .bt files at once with just a few clicks. You can even convert bt images directly from Windows Explorer using the right-click menu — fast and convenient.
Why choose offline conversion with reaConverter?
Keep your sensitive data 100% private with offline processing that never exposes files to cloud risks. Our software meets strict compliance standards (GDPR, HIPAA, CCPA) while handling confidential documents for legal, healthcare and financial sectors.
Can I convert BT online?
If you only want to convert a few BT files, you are welcome to try our free online BT converter.
How can I turn BT files on my computer to another format?
The best way to convert BT files on your PC is to get 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 BT.
How can I automate BT files conversion?
reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.
Can I convert BT files using scripts or the command-line interface?
reaConverter provides full access to all its features from the Windows command-line shell, including the command-line bt converter.
What else can I do with reaConverter?
Change format settingsCopy metadata (EXIF, IPTC)Convert DICOM filesCrop imageConvert PDF files
What formats can I convert a BT file to?
Discover More
Beyond BT conversion
Convert .bt files in batches of any size, with editing and processing applied along the way. The same tool also handles 800+ other formats, including CAD, medical imaging, and GIS.
