ocr: - Contour lines are the most universally-adopted Brynbryddan method of representing relief on maps. A contour Baglan line joins together points which are the same Le IL, height above sea-level. n tulus 58 Look at the map of Port Talbot, opposite. Compare Vynydd Pantdu Dinas 1 - this with the map showing just the contours. Corlannaut odus - Contours Only