I'm looking for the Mac equivalent of Ozi-Explorer.

  • Can load and geo-reference map files, tiling multiple map files together.
  • Can load, edit and save track data.
  • Nice to have: Talks to my GPS (not required, I can find other programs to read/write to the GPS)
  • is not locked into a proprietary map format.

It does NOT need to be able to convert map files to be usable on my GPS.

The idea is to make it reasonable to have a directory of map files, plan a trip, then figure out what paper maps I need to buy. Also to pre-load tracks into the GPS for use on the trip.

1 Answer 1


It might be overkill but take a look at GRASS GIS -

  • Cross Platform
  • Open Source
  • Gratis (free)
  • Can work with multiple sources and formats of information
  • Modules available to interface with various GPSs

To quote the web site:

GRASS GIS, commonly referred to as GRASS (Geographic Resources Analysis Support System), is a free and open source Geographic Information System (GIS) software suite used for geospatial data management and analysis, image processing, graphics and maps production, spatial modeling, and visualization. GRASS GIS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies. It is a founding member of the Open Source Geospatial Foundation (OSGeo).

  • 1
    Interesting. Good possible answer. Take my point. Apr 16, 2019 at 21:04

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