.hgt File Extension

SRTM Height Terrain

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What is a .hgt file?

The .hgt file extension is associated with SRTM (Shuttle Radar Topography Mission) data. These files contain elevation data, representing terrain height above sea level. The data is typically stored as signed 16-bit integers in a grid format. Each .hgt file covers a 1x1 degree area of latitude and longitude. The resolution of the data varies, with SRTM-1 data providing approximately 30-meter resolution (1 arc-second) for the United States and SRTM-3 data providing approximately 90-meter resolution (3 arc-seconds) for most of the world. These files are crucial for various applications, including geographic information systems (GIS), mapping, 3D modeling, flight simulation, and scientific research. They allow for accurate representation and analysis of terrain features, enabling tasks such as terrain visualization, slope calculation, watershed analysis, and route planning. The data is often used in conjunction with other geospatial datasets, such as satellite imagery and vector data, to create comprehensive and detailed maps and models of the Earth's surface. The format is relatively simple, making it easy to parse and use in custom applications.

.hgt File

SRTM Height Terrain

Compatible Software Alternatives

Software Compatibility

Windows

  • Global Mapper
  • QGIS
  • ArcGIS
  • MicroDEM
  • Landserf

macOS

  • Global Mapper
  • QGIS
  • ArcGIS
  • Landserf

Linux

  • QGIS
  • GRASS GIS
  • Landserf
  • GDAL

Mobile

  • Locus Map (Android)
  • OsmAnd (Android/iOS)

Alternative File Formats

Related Categories

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Frequently Asked Questions About .hgt Files

To open a .hgt file, you need compatible software. Here are some options:

  • Global Mapper
  • QGIS
  • Locus Map (Android)

Check the "Software Compatibility" section above for a complete list of programs that can open .hgt files on different operating systems.

To convert a .hgt file to another format, you can:

  1. Use compatible software: Many programs that open .hgt files also allow saving or exporting to different formats. For example, you might try using Global Mapper or Global Mapper.
  2. Try online conversion services: Websites like Zamzar, CloudConvert, or Online-Convert can transform files between formats without installing software.
  3. Convert to recommended alternatives: For .hgt files, consider converting to .DEM, .DTM, .TIF for better compatibility.
  4. Specialized conversion tools: Search for ".hgt converter" to find tools specifically designed for this file type.

Note: Converting files may result in some loss of formatting, quality, or functionality depending on the compatibility between formats.

If you're having trouble opening a .hgt file, try these troubleshooting steps:

  1. Verify the file extension is correct: Sometimes files may be incorrectly named. Make sure the file truly is a .hgt file.
  2. Update your software: Ensure you're using the latest version of your chosen program.
  3. Try alternative software: If one program doesn't work, try another from our compatibility list.
  4. Check for file corruption: The file might be damaged. Try to obtain a new copy if possible.
  5. Look for file converters: Converting to a more common format might help.

Like any file type, .hgt files can be safe or potentially risky depending on their source:

  • From trusted sources: Files from reputable websites, colleagues, or friends are generally safe.
  • From unknown sources: Exercise caution with files from unfamiliar websites or emails.

Safety recommendations:

  • Always scan files with antivirus software before opening them
  • Keep your operating system and applications updated
  • Be particularly cautious with executable file types

Common issues with .hgt files include:

  • Compatibility problems: Older or newer versions of software may not fully support certain .hgt files
  • Missing elements: Fonts, media, or other components may not transfer correctly between systems
  • File corruption: Incomplete downloads or transfer errors can damage files
  • Format variations: Different software may implement the .hgt format in slightly different ways

If you're experiencing issues with a specific .hgt file, you might need to:

  • Try opening it with alternative software
  • Ask the file creator to save it in a different format
  • Look for specific patches or updates for your software

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