What is a .MGD77 file?
The file extension .MGD77 refers to a type of data file known as an MGD77 Data File. This file format is specifically used for storing geophysical data collected from marine environments. The data within these files is presented in ASCII text format, which means it can be read as plain text. Each .MGD77 file typically includes important information such as the survey ID, the date of the survey, data on magnetics, the timezone, observed gravity measurements, latitude and longitude coordinates, and the water depth.
The MGD77 format was originally developed in the 1970s by the National Geophysical Data Center (NGDC) to facilitate the exchange of digital data related to marine geophysics. This format is commonly used to handle various types of geophysical data, including magnetics, bathymetry (which is the study of underwater depth of lake or ocean floors), gravity, and seismic navigation.
Researchers who study the underwater environment collect raw data during marine surveys. This data is initially stored in a system called InfoBank, which is a structured collection of databases and software designed for managing large sets of information. Once the data is organized and stored in InfoBank, it can be exported in the MGD77 format. This allows the data to be easily shared and analyzed, both at the data center and by other researchers who may need access to the data.
To open and work with .MGD77 files, the recommended program is GeoMapApp. GeoMapApp is a specialized software tool designed to handle and analyze geospatial data, making it suitable for viewing and manipulating the contents of MGD77 files.
Additionally, there is an updated version of the MGD77 format known as MGD77T. This newer format, which uses the .M77T file extension, offers several improvements over the original. These improvements include reduced file size for easier handling, expanded field lengths for additional data, and enhanced compatibility with other software programs, making it easier to import and use the data in various applications.
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