Cartographic Skills Map Type Description Map Example Maps with These symbols are drawn proportional in size to the size of the variable located being represented. The symbol used can theoretically be anything. Most proportional common are squares, bars and circles. symbols The method for drawing proportional bars or squares is: 1. Examine the data and decide on your scale. The length of the bar Squares and will be proportional to the value it Bars portrays. 2. Draw your bars on a base map, one end of the bar located next to the place to which it refers. 3. Bars should be of uniform width, solid looking and can be placed vertically or horizontally. The method for drawing proportional circle or semi-circles is: Circles and 1. Calculate the square root of the semi-circles values 2. Multiply each square root by a constant: this you the radius of each circle. 3. Draw the circles and mark the on the map The circles can be divided Flow line maps are used for Maps showing portraying movements or flows, such movement – as traffic flows along roads or flows flow lines of migrants between countries. A line is drawn along the road, or from the country of origin to country of destination, proportional in width to the volume of the flow.
Cartographic Skills Map Type Description Map Example Maps with located proportional symbols These symbols are drawn proportional in size to the size of the variable being represented. The symbol used can theoretically be anything. Most common are squares, bars and circles. Squares and Bars The method for drawing proportional bars or squares is: 1. Examine the data and decide on your scale. The length of the bar will be proportional to the value it portrays. 2. Draw your bars on a base map, one end of the bar located next to the place to which it refers. 3. Bars should be of uniform width, solid looking and can be placed vertically or horizontally. Circles and semi-circles The method for drawing proportional circle or semi-circles is: 1. Calculate the square root of the values 2. Multiply each square root by a constant: this you the radius of each circle. 3. Draw the circles and mark the on the map The circles can be divided Maps showing movement – flow lines Flow line maps are used for portraying movements or flows, such as traffic flows along roads or flows of migrants between countries. A line is drawn along the road, or from the country of origin to country of destination, proportional in width to the volume of the flow.
Skills-and-definitions-AS-Revision.docx