Opening a DT1 File

The DT1 file type is primarily associated with DTED Reader.

DT1	File extension: DT1
	File type:	geospatial data file

What is a DT1 file?

DT1 files mostly belong to DTED Reader. DT1 files store digital terrain elevation data used in geospatial applications.
This file format is designed for specialized software such as DTED Reader that displays terrain in a grid-based structure.
Key details provided by FilExt.com include:

Terrain Data Structure: The files contain elevation values arranged in a grid.

They serve mapping and geospatial analysis needs.

In some cases, they are created by data acquisition systems like the DT-1200.

FilExt.com tip: You will need dedicated GIS or digital terrain modeling programs to open and view these files, as they are not compatible with standard text editors or image viewers.

How to open DT1 files

You need a suitable software like DTED Reader to open a DT1 file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your DT1 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a DT1 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online DT1 Text Viewer

Choose your .dt1 file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert DT1 files:

DTED Reader
See the previous paragraphs to learn more about the main application. DT1 files are often referred to as DTED Reader gis because this type of file is primarily created or used by this software.
DTED (Level 1) by National Geospatial-Intelligence Agency
A data file of DTED (Digital Terrain Elevation Data) is a cell defined by latitudes and longitudes of a geographic reference system. The terrain elevation information is expressed in meters. The locations of elevation posts are defined by the intersections of rows and columns within a matrix. The required matrix intervals, defined in terms of geographic arc seconds, vary according to latitude. DT1 is generally 3 arcseconds.

DT1 file format:

If you can determine the file format, the associated program can also be determined. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. If there are problems opening a file, you must first determine the file format used. Our examination of the DT1 files comes to the following conclusion:

DT1 is seldom used as a file extension and includes different formats for different programs. But the following two file formats are common:

30% of all DT1 files use the same file format, which have the signature UHL1. These files are binary files, so they do not contain text, but only cryptic characters. DT1 files can be up to 12 MB in size, but are often around 2.9 MB - 12 MB. The file type was used 20 years ago but is still in use today. Several words can almost always be found in the files, e.g. DTED, DSIUOOPUBLIC SALE/NO, RESTRICTION and USCNIMA. An example of a file name is N30.DT1.
20% of all DT1 files start with the bytes 00 00 80 3F 00 00 00 00 crucial for this file format. They consist of unreadable binary data. The file size is in the range of 27 KB to 470 KB. The file name LINE00.DT1 or LINE1.DT1 is characteristic of these files. Files like these are about yyline.

All other DT1 files (50%) have different formats. These files sometimes refer to komra. If you want to find out which format your DT1 file belongs to, just click on the button "Choose your .dt1 file to analyze".

Technical Data for DT1 File Extension

File classification:

GIS

Related files:

dt0, dt2, dem, hgt, bil, dti, dt, dted, prog, dbd, prg, zip, txt

a dt1 geospatial data file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with DT1 files

Associate the DT1 file extension with the correct application.
Update your software that should actually open geospatial data files. Because only the current version supports the latest DT1 file format. Search, therefore, e.g. on the manufacturer website after an available DTED Reader update.
To make sure that your DT1 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .DT1 file online - secure, fast, and no downloads needed.