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Global Overlay Mapper ham radio mapping suite gets major update


The Global Overlay Mapper has been around for some years. The previous version was built as a series of browser pages within a Windows shell, and reached the end of its life once Window introduced ‘User Account Control’, making remote updating too difficult. At the time I was away from Ireland, back-packing around the world as a pro-travel photographer ( for 8 years.

Now back home again, I decided to completely re-write the Global Overlay Mapper as a proper Windows program that was compatible with Win 7, 8, and 10. Its 38 maps were updated to include all the new countries, prefixes, flags, and IOTA entities. (The Global Overlay Mapper is the only ham map-suite that displays all IOTA entities.) As a proper Windows program, I could now add a variety of features that I’d been planning for some time. You can now geocode a Cabrillo or ADIF log – in other words, you can add positions to each QSO and then plot your log on a map, thanks to the nice guys at HamQTH.Com. You can plot lists of positions or Maidenhead Locators. You can see, display, and plot callbook information. You can see real-time NCDXF Beacon transmission schedules, and plot the beacons.

The Global Overlay Mapper is ideal for every ham, no matter where their special field of interest might be. The local ragchewer, the HF and VHF dxer, International or Local Contester, Field Day Team, Emergency Communications Specialist, DXCC and Award Hunter, IOTA expeditioner; all will find the Global Overlay Mapper an important tool for everyday use. The Global Overlay Mapper is now shareware – it works for 30 days, then requires registration, which costs just USD15. If you registered a previous version, you can upgrade for just USD5.

To find out more, and download your copy, please visit:

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  • Matt W1MST, Managing Editor