Have a look at this slideshow to see examples of map symbols used on Ordnance Survey (OS) maps. The distance between contour lines shows how steep or flat the land is. If the contour lines are ...

The maps show that the Soviets ... types of factories and power plants. The symbols even distinguish between windmills and wind turbines, for example, and differentiate telegraph and telephone ...

Making Proportional Symbols in KML – using the placemark icon element to make proportional symbols Using Google Charts with KML – This innovative KML approach can also be used in Google Maps ...