Kartenmaterial
Aus BCC Contest- & Technik-Lexikon
- DX Atlas
- https://www.hb9eyz.ch/g_locator.php
- https://www.fun-funk.net/aprs4web/locator/
- http://dk3ml.de/2016/05/03/qth-locator-karte/
- https://www.mapability.com/ei8ic/gcm/index.php
- https://dx.qsl.net/propagation/greyline.html
- Karte erstellen mit einer Liste von Adressen: https://www.google.com/intl/de_de/maps/about/mymaps/