Surface weather analysis United States, temperature and dewpoint are plotted in degrees Celsius. The wind barb points in the direction from which the wind is coming. Each full flag on the wind barb represents of wind, each half flag represents . When winds reach , a filled in triangle is used for each of wind. In the United States, rainfall plotted in the corner of the station model are in inches. The international standard rainfall measurement unit is the millimeter. Once a map has a field of station models plotted, the analyzing isobars (lines of equal pressure), isallobars (lines of equal pressure change),
Tube map no complete maps of the network, just for the individual companies' routes. These maps were not typically schematic and were simply the line overlaid on a regular city map. There was no integration of the companies' services, nor was there any co-operation in advertising. In 1907, "The Evening News" commissioned a pocket map titled The Evening News London "Tube Map". This map was the first to show all of the lines with equal weight given to each line. In addition, it was the first to use a different colour for each line. Another early combined map was published in 1908