Create country borders image inside a specific area

问题

I have an array of latitudes and longitudes like this:

arr =
[[[52.451466,  8.669105]
  [52.450689,  8.683759]
  [52.449911,  8.698414]
  ...
  [49.358081, 29.464242]
  [49.354822, 29.477067]
  [49.351562, 29.489892]]

 [[52.442744,  8.667857]
  [52.441966,  8.682509]
  [52.441187,  8.69716 ]
  ...
  [49.349625, 29.459223]
  [49.346366, 29.472047]
  [49.343107, 29.48487 ]]]

which defines a polygon like this one:

The polygon segments or edges are arr[0] for the top, arr[-1] bottom, arr[:, 0] left and arr[:, -1] right. The polygon corners or vertices are arr[0][0], arr[0][-1], arr[-1][0], arr[-1][-1].

How can I create an image of country borders having this array? Please note that it is not a perfect rectangle. Also, the country name or other informations are not important, only the borders.

来源：https://stackoverflow.com/questions/57220788/create-country-borders-image-inside-a-specific-area