A correlation matrix is used to give correlations between all pairs of a data set. Correlation matrix's are used to show statistics and relationships between two different types of variables. This correlation matrix is showing data regarding excess returns vs. an index.
Here is an example of a similarity matrix. This type of graph shows similarity between two different types of data. All though they are not easy to read, they are good to use when compairing data. High scores are for similar data, and low scores are for more different data.
Another type of statistical graph is a Box Plot. Box plots provide a simple graphical summary of a set of data. Box plots can handle large data sets, but do not share an exact retained value.
A wind rose is used to show the different data regarding wind. Meteorologist generally use a wind rose to identify different wind speeds and direction in a specific area. A wind rose is also an example of a circular plot.
A climograph is used to show information regarding climates. These type of graphs are helpful when trying to learn an areas environment.
This population profiel is showing the percent of immigrant population in the U.S. in 2004. 
This scatter plot is comparing husband's and wife's ages. Scatter plots are often used to statistically describe a trend. Each observation is represented by a dot.
Here is an example of a Lorenz curve. Lorenz curves are often used to represent income distribution. The solid line is the Lorenz curve, which represents the actual distribution. Every point represents a statement, and every Lorenz curve has a Gini coefficient showing a line of perfect equality.
This bilateral graph shows California's mortgage rate trends. The blue representing a 30 year fixed mortgage, and the green representing a 30 year fixed jumbo mortgage.
This is an example of a nominal area choropleth map. This map shows predictions for Democrats v. Republicans during the 08 election. It is best to use standard colors when creating this map type, it helps to understand the material better.
Here is an example of an standardized choropleth map. This map shows the percentage of people under the age of 14 in Canada. Standardized choropleth maps show one type of data, and allows the viewer to compare the criteria for different areas.
Here is an example of a bivariate choropleth map. This type of map is thematic, showing several different types of data; for example this map shows 4 different price ranges of housing in Ohio.
Here is an image of Isopach lines. This one shows sandstone quality created from well logs. Isopaches are used to elevations and differences in height. The pink area shows that the sandstone is about 45ft thick, and the green is 25 ft thick.
Isohyets are another type of contour line. This image of Isohyets is showing the amount of rainfall in Tasmania. This shows lines of precipitations and rainfall.
This is an image of isotachs on a map. Isotachs are a form of contour lines. This map shows the knots in Florida. Isotachs are used for weather purposes, mostly to measure wind.
This is an image of Isobars. An isobar is a line of equal or constant pressure on a map. The lines are drawn to represent equal lines of pressure. Meteorologists use these types of maps when practicing the weather and climate conditions.
This is an image of Light Detection and Ranging (LIDAR). This LIDAR picture was taken above Kansas City. LIDAR shows an aerial view, that is also three dimensional. These types of images can be very helpful to tourist in an area.
Here is an image of a black and white aerial photo. Aerial photos are a picture of a land mass or certain area from far above, such as a helicopter, air plane, or sky scraper. This one shows a highway in Kansas City, the roads and intersections stand out because they show more of the "white." While the ground underneath the intersection is dark, and less noticeable because it shows more of the "black."
This is one of my favorite types of maps. Statistical maps, these are used to show statistics of various types. This one particular shows the percentage increases of Internet in Africa from July 1995-July 1996. The major growth was people and places that have newly received Internet access. Statistical maps can show any type of statistic in any area, some examples are college graduates, births, incomes, and pets. 
This is a cartogram of global amphibian diversity around the world. This is an illustration ofamphibian diversity and density. As the green color display darker, that shows that there are more amphibian in that particular area. Cartograms can be used to show a number of things across the world such as animal populations, emissions, census information, colleges and just about any thing.
Here is an example of a proportional circle map. This map shows the different industries in Germany. Not only does it show where the industries are, it shows the different varieties of each industry.
This is an image of a choroplethmap. This particular one shows the Hispanic culture in the state of Florida. The darker the color the more popular and intense the hispanic culture is in that one particular area. Chrorplethmaps are thematic. This map was used from data of the 2000 census.
Here is an example of a dot distribution map. This particular dot distribution map was taken during the 2000 census. This map shows the US population, each dot equals 7,500 people. Dot distribution maps can be used to show military bases, poverty levels, age differences, single family homes, schools, race or any object in a certain area.
This is an example of an cadastral map. Cadastral maps are used to show ownership of properties. This type of map shows precise locations, and dimensions of individual parcels of land. Cadastral maps are used by many nations around the world, and some also include GPS coordinates. This particular cadastral map is of a neighborhood.
This is an image of a topographic map; which is a type of map that represents natural and man-made landmarks. This is a topographic map that uses contour lines. This topographic map uses a large scale that is typically used in topographic maps, all though topographic maps can be used for a smaller scale.
