The Polaric Server is mainly a web based service to present live tracking information (APRS, AIS, etc) on maps and where the information is updated in realtime. It is originally targeted for use by radio amateurs in voluntary search and rescue service in Norway. It consists of a web application and a server program (APRS daemon). It runs on e.g. aprs.no as a online service on the internet, but we could also bring it with us out in the field in a portable computer, possibly with its own LAN, APRS modems and radios. A goal is that it should be able to work without always being online with a good connection to the internet.

Github: https://github.com/orgs/PolaricServer/repositories

Lots of Java, unfortunately.

Natural Earth is a public domain map dataset available at 1:10m, 1:50m, and 1:110 million scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software.

Natural Earth was built through a collaboration of many volunteers and is supported by NACIS (North American Cartographic Information Society), and is free for use in any type of project (see our Terms of Use page for more information).

FoxtrotGPS is an easy to use, free & open-source GPS/GIS application that works well on small screens, and is especially suited to touch input. It spun off of tangoGPS in 2010 with a focus on cooperation and fostering community innovation. FoxtrotGPS is freely available to the public for use, redistribution, and modification under the terms of the GPLv2. Requires gpsd.

A Python module which makes it easy to carry out GIS related operations. Look up coordinates of addresses, locations, and landmarks. Has a geocoding function. Can calculate distance between two points on the globe. Pretty straightforward to use.

A free, publically referrable, publically editable street map of the world, generated out of data contributed by the people who live there.

A FOSS GIS software package. Create and edit geospatial information on just about every platform. Maybe useful?

Nominatim is the OpenStreetmap server for searching the database for an address and figuring out where in all of the map datapoints that address is. When you figure out where in the database it is, you can then serve up the appropriate map tiles. Powers the search box on the website. Used to import the map data.

The public github account of the NSA.