Choropleth
A choropleth map is a thematic map in which areas are shaded or patterned in proportion to the measurement of the statistical variable being displayed on the map, such as population density or per-capita income. Choropleth maps provide an easy way to visualize how a measurement varies across a geographic area or show the level […]
Cartogram
A cartogram is called a thematic map in which a mapping variable – such as travel time, population, or GNP – is substituted for land area or distance. As the space or geometry of the map is used to convey the information of an alternative variable, the map is usually distorted and sometimes to a […]
Bar Chart
A bar chart or bar graph is a chart that represents categorical data with rectangular bars with heights proportional to the values that they represent. Here one axis of the chart plots categories and the other axis represents the value scale. The bars are of equal width which allows for instant comparison of data. [chartdesc] […]
Area Chart
An area chart or area graph is based on the line chart but is used to primarily communicate the summation of data rather than represent individual data values, as in line charts. The area between axis and line is usually emphasized with colors, textures or hatchings. The area underneath the line can help one to […]