This projects aims at creating the correct data to be used in a Godot game. The data consists of some polygons representing countries or regions of the world ; the capitals of these countries, and the flags of the countries/regions.
The data created originated from an anki deck called Ultimate Geography. I must thank its creator for the amazing work done to collect all the information.
This part is definitely the most tidious one. Based on the name of the countries,
I had to collect the polygons representing them in the world. I used the data from
Open Street Map.
Once the highly-detailed polygons were gathered (in the osm_polygons/ folder), they had
to be simplified. I used Visvalingam's algorithm
to do so. The idea is to get two simplified shapes : first, a precise map for displaying purpose
(contained in polygons_display/ folder) ; and then another less precise map for mouse in-game interaction purpose
(contained in polygons_collision/ folder).
After computing these things, I find out islands borders were poorly documented in OSM. Hence, I wrote a python script
that takes a png image from OSM of the island or archipelagos, and then uses OpenCV to get the borders.
This process has a big manual part, and it is located in the osm_maps/ folder.
Base data for flags was recollected in the .svg format from Wikipedia (flags_from_wikipedia.py does this.). Missing
flags were added manually. These are located in the wiki_flags/ folder.
Then, the conversion to png images was done using flags_svg_to_png.py. The result is in the flags/ folder.
The choice was made to keep all flags to the same height. The width was computed accordingly in order not to disrupt the
real ratio of the flags.
I'll refer to the name pinpoint to talk about the countries capitals locations. I've also used OSM to gather them.
Then, they were slightly changed to have the same coordinates as their countries polygons. As before, the raw collected
pinpoints from OSM are in osm_pinpoints, and the modified pinpoints are in pinpoints/.