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Memory-Map file extensions explained

This article deals with the various file types associated with Memory-Map.
There are five major files associated with the Memory-Map program.  These are:
  • QCT/QC3 - These are the most important files you will use.  They are the actual maps used by the program.  Smaller charts or sheet maps will only have a QCT file.  The larger maps will have both a QCT and a QC3 file, and these allow the mobile apps to download portions of the map as needed.
  • GPX - Overlay data for saving / loading marks, routes and tracklogs. This is an open standard supported by many GPS and map software providers.
  • QED - These files contain the elevation data for the maps.  These files are required to use the 3D World feature.  If the elevation file is specific to a map, it will have the same name as the map.
  • MMI - These files contain the data for the search index.  These files are required to perform a place search in the program.  It is possible to create your own MMI file.  This process is detailed in the HELP files.
  • MMO - These files are used internally by the Memory-Map PC app for storing overlay data.  This includes your routes, tracks, waypoints, and text items. Please note, for the Mac, Android and iOS apps, you must use GPX files, not MMO. Also note that MMO files are not backwards compatible, so if you are sending data to a friend who may have an older version of Memory-Map, it is best to use GPX.
NOTE:  QED and MMI files, while often associated with a specific map, are not exclusive to a map.  If you have a QED file for an area, you can use this elevation file with any map which covers this area.  (To manually load a QED file, go to MAP > ELEVATION DATA and select the file you want.  To load an MMI file, go to SEARCH > LOAD DATABASE > MMI FILE and select the file you want.)