.477 File

.477 is MNS Shape Definition Companion File

Key Features: .477 File Extension

Features	Description
File Extension	.477
Format	N/A
Created by	Sapper Oy
Category	GIS

What is an .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.

MNS Shape Definition Companion File - File openers

Windows

Sapper Oy Master Navigator Software

Sapper Oy

GIS

N/A

How to solve problems with 477 files

Associate the 477 file extension with the correct application. On :
Windows: Right click on any 477 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.477 files". Mac: Right click (or Ctrl-click) the 477 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
Update your software that should actually open .477 is MNS Shape Definition Companion File. Because only the current version supports the latest 477 file format. Search, therefore, e.g. on the Sapper Oy manufacturer website after an available .477 is MNS Shape Definition Companion File update.
To make sure that your 477 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.