Alternative Google Maps Solution

Another solution would be to use N0TTL's free GridTracker (https://tagloomis.com/) in combination with WJST-X. Both offline and online mapping is provided along with a lot of other things. GridTracker supports all modes that WJST-X does as well as interfacing to various logging programs. I use it for WSPR data analysis since it saves CSV data and plots for you in real-time. Then I can use KP4MD's excellent spreadsheet tool for mode comparisons, etc. GridTracker is a great for working in the field when you don't have internet connectivity. FT8 users use it the most, but I use it for WSPR data collecting and analysis. I run WJST-X in WSPR band hopping mode and use the collecdted data to compare antennas, receivers, transmitters, propagation, etc.