DT2 to TXT Converter

DT2 to TXT Conversion Explained

Converting .DT2 to .TXT changes a binary elevation grid into human-readable text. .DT2 files are Digital Terrain Elevation Data (DTED) Level 2 files, a standard military and government format that stores elevation points at a 1 arc-second resolution (roughly 30 meters). When you convert this format to .TXT, the binary data is typically translated into an XYZ format, where each line represents a point containing Longitude, Latitude, and Elevation.

People perform this conversion to inspect raw elevation values, feed data into custom scripts, or use legacy software that lacks modern GIS libraries. You gain universal readability and easy parsing. However, you lose binary efficiency, fast rendering speeds, and embedded spatial metadata. Converting to .TXT is often a bad idea for large datasets because the resulting file size will be massive, and modern GIS software will struggle to process it efficiently.

Typical Tasks and Users

This conversion is primarily used by geospatial analysts, software developers, and engineers. Common workflows include:

• Data Debugging: Analysts convert small sections of terrain data to text to manually inspect elevation anomalies or verify specific coordinate values.
• Custom Software Development: Developers writing simple Python or C++ scripts can parse a .TXT file easily without integrating heavy geospatial libraries.
• Legacy System Integration: Engineers using older CAD software or proprietary simulation tools often require plain ASCII XYZ input because their systems cannot read binary .DT2 files.

Software & Tool Support

Several professional tools and libraries can open, edit, or convert .DT2 and .TXT files:

• GDAL: The industry-standard open-source command-line library. The gdal_translate utility can convert .DT2 into an XYZ ASCII .TXT file.
• QGIS: A free, open-source desktop GIS application that can load DTED files and export the raster layer as a text-based XYZ grid.
• Esri ArcGIS Pro: A commercial GIS platform that natively reads .DT2 and includes geoprocessing tools to export raster data to ASCII formats.
• Global Mapper: A commercial GIS tool known for extensive format support, which easily translates binary elevation grids into text files.

Pros and Cons of the Conversion

Pros:

• Universal Compatibility: Any programming language, text editor, or spreadsheet software can open a .TXT file.
• Transparency: You can manually read and verify the exact elevation of any geographic coordinate.
• Zero Dependencies: Parsing text does not require specialized GIS software or complex binary decoders.

Cons:

• Massive File Size: A .TXT file stores every digit as an ASCII character. The resulting file is often 10 to 20 times larger than the original .DT2.
• Poor Performance: Reading and rendering millions of text lines is slow and memory-intensive.
• Metadata Loss: Standard .TXT files drop the Coordinate Reference System (CRS) definitions and the specific UHL, DSI, and ACC headers found in DTED files.

Conversion Difficulties & Why Convert.Guru

Converting .DT2 to .TXT is not a simple file rename. .DT2 files are structured as continuous binary grids. To create a useful .TXT file, the conversion software must read the file header, determine the bounding box, and calculate the exact latitude and longitude for every single pixel in the grid. Furthermore, DTED files use specific values (usually -32767) to represent "no data" areas. If a converter fails to recognize this, it will output extreme negative elevations, ruining your dataset.

Convert.Guru handles this conversion pipeline automatically. It extracts the binary grid, performs the necessary spatial math to assign coordinates to each elevation point, and formats the output into a clean, structured .TXT file. It correctly identifies and manages "no data" values, ensuring your text file contains accurate terrain data without requiring you to write complex command-line scripts.

DT2 vs. TXT: What is the better choice?

Which format should you choose?

Choose .DT2 if you are working within standard GIS environments or need to store and render large amounts of terrain data efficiently. The binary format is designed specifically for these tasks.

Choose .TXT only if you need to feed elevation points into a custom script, a legacy engineering tool, or if you need to manually inspect specific coordinate values in a text editor.

If you need broad compatibility but want to avoid the massive file size and performance issues of .TXT, you should avoid this conversion entirely and convert your .DT2 to a GeoTIFF (.TIF) instead.

Conclusion

Converting .DT2 to .TXT makes sense when you need raw, human-readable elevation data for custom programming or legacy software integration. The biggest limitation to watch for is the drastic increase in file size and the loss of embedded spatial metadata, which makes the resulting text file unsuitable for standard GIS rendering. Convert.Guru provides a reliable, browser-based solution to convert dt2 to txt, ensuring that coordinate math and "no data" values are handled accurately without the need for specialized desktop software.