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.HGT File Extension

File TypeSRTM Elevation Data File

3.8 (9 Votes)
CategoryGIS Files

What is an HGT file?

GIS data file stored in the Shuttle Radar Topography Mission (SRTM) format; contains global elevation data captured during NASA space missions; may include up to a one arcsecond resolution; used for analyzing the earth's topography and for generating topographical images.

More Information

Some data in the original SRTM dataset is missing due to limits of the space missions. These areas are referred to as "voids." Efforts have been made to fill in the missing gaps using interpolation methods. For example, the National Geospatial-Intelligence Agency (NGA) created the "Version 2" and "Version 2.1" datasets, which include modified data. Therefore, some downloaded HGT files may include interpolated data.

HGT files are named with longitude and latitude coordinates. For example, N00W177.hgt contains data for one degree of latitude (00-01 North) and one degree of longitude (177-178 West).

NOTE: The "HGT" extension is an abbreviation for "height."

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Programs that open HGT files
Updated 11/8/2010

About HGT Files

Our goal is to help you understand what a file with a *.hgt suffix is and how to open it.

The SRTM Elevation Data file type, file format description, and Windows and Linux programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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