what are the 4 maps. phyical, population , polical waht is the last one please

There are many more than four types of maps -- road, climate, topographic, etc.

Check this site for more information.

http://geography.about.com/od/understandmaps/a/map-types.htm

The fourth type of map is called a thematic map. Thematic maps represent specific themes or topics, such as climate, vegetation, transportation, economic activities, or natural resources. These maps use different colors, symbols, or patterns to visually communicate the information being represented. Thematic maps help in understanding the distribution or patterns of a particular topic within a specific region or area.