Contour line factors in a weather system. An isobar (from or "baros", meaning 'weight') is a line of equal or constant pressure on a graph, plot, or map; an isopleth or contour line of pressure. More accurately, isobars are lines drawn on a map joining places of equal average atmospheric pressure reduced to sea level for a specified period of time. In meteorology, the barometric pressures shown are reduced to sea level, not the surface pressures at the map locations. The distribution of isobars is closely related to the magnitude and direction of the wind field, and can be used to predict
Points classification in the Vuelta a España stage and the rider with the most points wears the jersey. This system unlike the Tour de France & the Giro d'Italia, gives equal amount of points in the mountains compared to the flats, this paired with the high number of summit finishes at the Vuelta means there’s a correlation between the overall classification and the points jersey. A good example from 2012 when sprinter John Degenkolb won five stages but only finished fourth in the points competition with Alejandro Valverde well ahead. Points classification in the Vuelta a España The points classification in the Vuelta a España is a