Cartographic overlay involves superimposing multiple maps to compare and analyze different aspects of a region, allowing for a comprehensive understanding of the spatial relationships between various features.

Isolines are used to represent continuous data, such as temperature, elevation, or rainfall, by connecting points of equal value to create lines or contours.

Proportional symbol mapping uses symbols or icons whose size or shape is proportional to the value of the data they represent, allowing for easy visual comparison of different data points.

Choropleth maps are used to show the distribution of a phenomenon by dividing a region into units (such as counties or states) and coloring each unit according to the value of the data for that unit.

A cartogram is a map in which the size or shape of geographic features is distorted to emphasize a particular aspect of the data, such as population or economic activity.

Dot maps are used to show the distribution of a phenomenon by placing a dot at each location where the phenomenon occurs, with the number of dots indicating the frequency or intensity of the phenomenon at that location.

Graduated color mapping uses different colors or shades to represent different ranges of data values, allowing for easy visual comparison of the data.

Flow maps are used to depict the movement of people or goods between different locations, using arrows or lines to indicate the direction and magnitude of the flow.

Proportional symbol mapping uses symbols or icons whose size or shape is proportional to the value of the data they represent, allowing for easy visual comparison of different data points.

A cartogram is a map in which the size or shape of geographic features is distorted to emphasize a particular aspect of the data, such as population or economic activity.

Isolines are used to represent continuous data, such as temperature, elevation, or rainfall, by connecting points of equal value to create lines or contours.

Choropleth maps are used to show the distribution of a phenomenon by dividing a region into units (such as counties or states) and coloring each unit according to the value of the data for that unit.

Graduated color mapping uses different colors or shades to represent different ranges of data values, allowing for easy visual comparison of the data.

Flow maps are used to depict the movement of people or goods between different locations, using arrows or lines to indicate the direction and magnitude of the flow.

Graduated symbol mapping uses symbols or icons whose color is proportional to the value of the data they represent, allowing for easy visual comparison of different data points.