6138 Billa Kalina 1:100k Topographic Map Iinternational Resources Oil & gas National Geographic has been the

National Geographic has been the world’s leading authority in cartography

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6138 Billa Kalina 1:100k Topographic Map Iinternational Resources Oil & gas National Geographic has been theAt a scale of 1: 100,000, 1cm on the map represents 1km on the ground. Each map covers a minimum area of 0. 5 degrees longitude by 0. 5 degrees latitude or about 54 kilometres by 54 kilometres. The contour interval is 20 metres. Many maps are supplemented by hill shading. Topographic maps show contours, spot elevations, streams, roads, buildings, place names, vegetation and administrative boundaries. They are used by emergency services, environmental