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
IF-MAP Version 2.1 of the IF-MAP spec was published on May 7, 2012. The primary new feature of IF-MAP 2.1 is that the IF-MAP identifier space became extensible. A reference implementation is available under GPLv3 license on Google Code repository. IF-MAP is supported by a variety of vendors: IF-MAP The Interface for Metadata Access Points (IF-MAP) is an open specification for a client/server protocol developed by the Trusted Computing Group (TCG) as one of the core protocols of the Trusted Network Connect (TNC) open architecture. IF-MAP provides a common interface between the Metadata Access Point (MAP), a database server acting as