Ключевые слова: abstract, administrative, america, area, background, black, cartography, contour, county, dark, design, division, federal, geography, gray, grey, illustration, isolated, labels, line, lines, location, map, names, north, north america, oklahoma, outline, region, shape, silhouette, state, states, symbol, topographical, tourism, transport, travel, united, united states, us, usa, white,