A locator map of Finland for the articles on the national parks of Finland in en-wiki.
The gray lines divide the country into provinces and further into regions. The black dashed line is the polar circle.
Lambert conformal conic projection; geographic coordinates can be mapped to percentages of image width with the equation pair
{x=r⋅sin⁡α+242.706y=r⋅cos⁡α−1747.916{\displaystyle {\begin{cases}x={\frac {r\cdot \sin \alpha \,+242.70}{6}}\\y={\frac {r\cdot \cos \alpha \,-1747.91}{6}}\end{cases}}}where

r=−71.7725⋅lat+6797.91{\displaystyle r=-71.7725\cdot lat+6797.91}
α=0.8183⋅(lon−24){\displaystyle \alpha =0.8183\cdot (lon-24)}.
lat and lon are given in decimal degrees (° north and east, respectively)
x and y will be the percentages (%) of image width (for the geobox template).
Vectorized on a CIA map (Image:Finland 1996 CIA map.jpg).
Oona Räisänen (Mysid)