Contour Lines 3 : Lines drawn on maps and charts joining points of equal elevation; also, a line connecting points of equal altitude on a constant-pressure chart
Ilan Kelman (ed.), Vulnerability and Resilience Definitions and References, Version 2, 2007. http://www.islandvulnerability.org/docs/vulnres.pd f, (Vulnr and Resilience - Brit) {524}