.477 File Extension
File TypeMNS Shape Definition Companion File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is a 477 file?
File used by Master Navigation Software, a GIS navigation program used on laptops and mobile devices; saved with a corresponding ESRI shapefile (.SHP extension) and contains the the type definition for the PROJ.4 cartographic projection data.
477 files are used for accurately placing geographic boundaries and other map features on a rendered map.