File Extension Library


.M77T File Extension

  • Developer by: National Geophysical Data Center
  • Category: Data Files
  • Format: Text

What are .M77T files and how to open them?

Can't open .M77T file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .M77T file.

What is a .M77T file extension?

.M77T file extension is created by National Geophysical Data Center. .M77T has been classified as Data Files. The format of .M77T file is Text.

.M77T is MGD77T Data File

Data file created and used by GEODAS ReFormat to MGD77T, a program used to format geophysical data into the Marine Geophysical Data Exchange (MGD77T) format; contains bathymetry data in ASCII text format; includes the survey ID, date, timezone, water depth, and latitude and longitude coordinates.

M77T data files are created from raw data collected by marine researchers using InfoBank, a structured information storage scheme of databases and software. The raw data is collected by researchers studying underwater depth of lake and ocean floors, which is known as bathymetry. A M77T and .H77T file, along with other metadata files, are used to transmit data to and from a data center for analysis.

NOTE: The GEODAS ReFormat to MGD77T is no longer available for download.

How to fix problems with .M77T files

  1. You need to update the application that you normally use to open .M77T files. Only the latest version of the software supports the current .M77T file format
  2. You need to check the .M77T file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)