RDF Mapper

RDFMapper is a tool for visualising bearings produced by a pseudo-doppler radio direction finder (or other bearing finding hardware). It was originally written to work with the PA8W doppler RDF.


Radio direction finding is typically used to find the position of a transmitter, using one or more direction-finding receivers. The receiver produces a bearing to the transmitter, which is only useful when it is referenced in the real world. RDFMapper is a solution designed to solve the problem of locating these bearings in the real world.

  • Runs on Windows, Mac and Linux (x86-64)
  • Show the current position and heading of an RDF reciever on the map
    • From a GPS receiver
    • By manual positioning on the map using landmarks etc
  • Plot bearings from an RDF receiver to allow 'moving receiver triangulation'
  • Upload/download bearings to/from a web server to allow triangulation using mulitple RDF receivers
    • Optionally set up your own server
  • For more information, download the RDFMapper documentation

Development / About the Author

RDFMapper was developed by Jonathan Musther in New Zealand as a result of a globe-spanning RDF collaboration with PA8W (Wil). The first version was buggy at best, but after much refinement, testing and feature assessment, we're very happy to be able to bring you the current verison. If you are looking for a very powerful RDF solution, consider pairing PA8W's excellent RDF41 with RDFMapper (for pricing and to purchase an RDF41, contact pa8wil@gmail.com). If you have any questions, requests, or comments please feel free to get in touch using the details at the bottom of this page.


RDFMapper is available to purchase for single-user, non-commercial (hobby/personal) use for NZ$40 (approx. US$27, EUR23, GBP20). To purchase RDFMapper, click on the buy-now link below to complete payment via PayPal. You will then receive a download-link by email (to the address you provide to PayPal). Purchase includes:

  • Unlimited personal technical support
  • Lifetime access to upgrades
  • Simultaneous use on multiple computers (for a single user)
    • This does not include redistribution to other users - if in doubt, contact the author

For commercial or charitable use, or for customisation, please contact the author using the details at the bottom of the page.

RDFMapper - NZ$40

Contact - Jonathan Musther


+64 (0) 27 749 6350