This puzzle type is known alternatively as nonogram and picross. Each row or column heading tells the size in order of each of the connected stretches of black cells in that row or column. This one has a relatively straightforward solving path, beginning by using the longest clues to figure out which cells must be black, and using those cells to figure out which cells in the crossing rows must be white, continuing from there.
As suggested by the title of the puzzle, the completed grid looks like a map of a country, and a little research will reveal that this country is PANAMA.