I use gnuplot heavily to plot things. I also use OpenStreetMap heavily to map other things. Sometimes I want to draw a map using OSM tiles, and to plot something on top of it. Gnuplot has the core functionality, but some glue code needs to be written to actually make this available. I just wrote this glue code, and it lives in a new repository: https://github.com/dkogan/osmgnuplot
The repository contains the documentation and usage examples. The next post uses this extensively to visualize mapping data.