Ключевые слова: abstract, africa, background, border, business, cartography, chad, chadian, citizen, communication, contour, country, creative, design, diamond, digital, djamena, effect, flat, geography, globe, government, graphic, illustration, infographic, internet, line, location, map, middle, modern, national, nationality, new, poly, polygon, polygonal, region, republic, republican, shape, shiny, technology, territory, topography, travel, triangle, voyage, wander,