.MPK File Extension
File Type 1ArcGIS Map Package
What is an MPK file?
Packaged map file created by ArcMap, a GIS mapping program included with ESRI ArcGIS Desktop; stores both the .MXD file and all data for the map, even if the data is originally located at remote or disparate locations; used for saving a consolidated, self-contained map and sharing it with a user at a different location.
To create a map package, ArcMap first downloads all data and then combines it with the MXD file into the resulting MPK file. This is useful for viewing maps without having access to the data connections required to view the map contents.
To extract a MPK file, drag the file into ArcMap or right-click on the file and select "Unpack." By default, map packages are extracted to the \[user]\Documents\ArcGIS\Packages\ directory.
NOTE: MPK files were introduced with ArcGIS version 10 and are not compatible with earlier versions of the software.
File Type 2Project64 Memory Pack File
.MPK File Association 2
Controller pak (MemPak) file for a Nintendo 64 emulator; stores data that can be loaded into the Project64 emulator, such as saved games or user settings; functions the same as a controller pak for the actual N64 console.
To load data from an MPK file, the file must selected using an input plugin such as Jabo's input plugin. The data will then be loaded automatically.