6231 Barna 1:100k Topographic Map Portugal infrastructure work

infrastructure work

and how the oceans serve as the global marketplace

Unlike the more common Africa-centred world maps

Schools & educational institutions

or consulted daily at home

6231 Barna 1:100k Topographic Map Portugal infrastructure workAt 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