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 maps reference sources
 
 All the maps (except romania-historical and lithuania-cultural) were created based on data from OpenStreetMap (downloaded with https://osm-boundaries.com/ in EPSG:4326 coordinates), converted to country-specific projections using reproject (https://www.npmjs.com/package/reproject), converted to svg with geojson-to-svg (https://www.npmjs.com/package/geojson-to-svg), and then heavily edited in Inkscape.
 
 romania-historical map was based on https://commons.wikimedia.org/wiki/File:Romania_historic_regions.svg (CC-BY-SA 3.0 Unported license, by Andein), with heavy editing in Inkscape.
 
 lithuania-cultural map was based on https://commons.wikimedia.org/wiki/File:Liet-etno-regionai.png (public domain license), with heavy editing in Inkscape.
 
 
 ***
 
 Steps to create country regions map:
 
 -Get the map coordinates from https://osm-boundaries.com/
 (select country, admin level min and max 4, file format GeoJSON, SRID: 4326, Land only, Simplify: Even less (0.01))
 
 -extract the *.geojson.gz file to *.geojson
 
 -find the best projection available for your country in https://epsg.io or https://spatialreference.org/
 
 -convert the .geojson file to the selected projection with reproject from https://www.npmjs.com/package/reproject (replace EPSG:3857 by the code of the projection you selected; check the manual of reproject for more details)
 example:
 cat OSMB-myFile.geojson | reproject --use-epsg-io --from=EPSG:4326 --to=EPSG:3857 > countryName.geojson
 
 -convert the resulting .geojson file to svg with geojson2svg from https://www.npmjs.com/package/geojson-to-svg
 example:
 ./geojson2svg --input countryName.geojson > countryName.svg
 
 -open the svg file in inkscape
 
 -first step is to change the document Width and Height to 500 px, the Scale X and X to 1.0, the Viewbox X and Y to 0.0 and the Viewbox Width and Height to 500px
 
 -select everything (ctrl + a) , lock the size ratio in the top bar and set the biggest side (width or height) to 480px
 
 -use the menu View - Zoom - Zoom Selection
 
 -as the converted svg appears to be upside down, press v key to mirror everything vertically
 
 -set the document size again to adjust the width or height (example: if the content is 480px width and 203px height, set the document height to 230px, that is at least 20px more than the content height and rounded to the next tens.)
 
 -with everything selected, center the content vertically and horizontally inside the document page
 
 -if needed, use again the menu View - Zoom - Zoom Selection
 
 -create a new layer named [back]country_name
 
 -cut all the content, and paste it in place in the new layer
 
 -set the contents style: fill color pure white (#ffffffff), and the outline size 0.5px and color #505050ff
 
 -ungroup (shift+g) the content to get separate regions as single items
 
 -for each region: create a new layer, name it with the region's name, cut the region from the back layer (ctrl+x) and paste it in place in the new layer (ctrl+alt+v)
 
 -select all the objects, and remove their outline
 
 -hide all the layers, and then for each layer, make it visible, and at zoom level between 200% and 300% (adapt to get the level of detail you want, but most importantly use the same zoom level for all the regions, and don't use a zoom level higher than 300% to keep the result small enough) use the fill tool on the region's shape to create a new shape for it, more simplified (this is needed as the imported shapes are often too heavy and not very optimized; the fill tool helps here to create a new shape more optimized while keeping the shape similar enough). NOTE: if a region is made of several shapes, fill them all, then select them all and join the shapes (with ctrl++). Fill Tool tips: first in the document settings, set the background color to a dark grey; then when using the fill tool, set its settings to Fill by: Alpha, Threshold: 50, Grow/shrink by:0, Close gaps: None
 
 -delete all the original imported shapes (tip: select the newly created shape, move it down with the button "Lower selection to bottom (End)", select the original shape that is now on top and delete it.)
 
 -select all the shapes, and set their fill color to #e77936ff, and their outline size to 0.5px and color to #505050ff.
 
 -select one shape after the other, and change their color by just shifting their hue (in Fill Flat color, with HSL selected, move the H slider) to get different colors for each region. You can also at some point increase a bit the L slider to get more variations with lighter colors.
 
 -on the [back] layer, create a rectangle of the same size as the document, without outline, and position it at 0,0 coordinates, and set its fill color to mid grey (#808080ff)
 
 -copy all the shapes, select the [back] layer and paste them all in place, and set their fill color to #ffffffff
 
 -Save the file as inkscape compressed svgz
 
 -install the inkscape extension "Export Layers GCompris", and use it to export all the layers to separated svg files and a text file with the coordinates for each region (they will be found after export in ~/.config/inkscape/extension/layers/ )
 
 -optimize all the exported .svg files using svgo from https://www.npmjs.com/package/svgo
 example: svgo -f /path/to/svg/folder output/folder/
 
 -copy the script convertSvgToSvgz.sh inside the output folder and run it to convert all optimized svg to svgz, then do rm -f *.svg to delete the svg and keep only the svgz files
 
 -copy the source svgz file (with all the map and regions) in MapSources in geo-country, and copy the exported separated layer svgz files to a folder with the country name in resources
 
 -create a board file for the country (look at other board files to copy the structure), and use the coordinates from the text file for each region