How are the fronts represented on a weather map

Just like on any other weather channel the blue pointed line on the map represents a cold front on the map just as the red line with simi-circles on it is a warm front. 

example picture of a cold front

What is a warm front?

Awarm front is defined as the region in which a warmer air mass replaces the previous cold air. Warm fronts travel from the southwest to the northeast and tend to be warmer and more humid.

What is a cold front

The definiton of a cold front is that of the area of change on which a cold air mass replaces a warmer air mass. Cold fronts tend to move from the northwest to southeast. Air in a cold front is colder and dryer then the air in front.