Map Catalog

Monday, December 8, 2008

Star plot


A star plot is a graphical method of displaying multivariate data. Each star represents a single observation. In this star plot from NASA the center represents the most desirable design results represented.

Correlation matrix


A correlation matrix is a matrix giving the correlations between all pairs of data sets. THe above matrix is a calculated protein correlation matrix for phage T7. Correlated behavior ranges from high(red) to low(blue) and the triangular block of red reflects proteins involved in phage assembly.

Similarity matrix


A similarity matrix is a matrix of scores which represent the similarity between two data points. This matrix explores the use of behavioral attribute clustering as a method to automatically categorize common malware patterns under one forensic model description, and to help rapidly identify new malware behavioral patterns.

Stem and leaf plot


A stem and leaf plot is a display that organizes data to show the shape and distribution. The data is organized by place value. Typically the "leaf" is the last number of the digit and all the numbers to the left are the "stem". For example - 90 (9 is the stem, 0 the leaf).

Box plot


A box plot, also called a box and whisker plot, was created in 1977 by John Tukey. The plot is an efficient way of showing a five-number data summary. The box gives the middle 50% of the data. The upper edge gives the 75th percentile of the data set and the lower the 25th percentile. The line in the middle of the box represents the median value. The whiskers represent the minimum and maximum data values.

Histogram


A histogram is graphical display of tabulated frequencies shown as bars.

Parallel coordinate graph


A parallel coordinate graph is used to plot large multivariate datasets. Each variable in the data plot is represented as its own Y Axis on the graph. A maximum point for each Y axis is selected, and they are scaled relatively to each other so that each variable takes up the same area in the graph space. This graph was used to plot baseball statistics.



A triangular plot is a graph of 3 variables. The proportions of the three variables plotted always sum to some constant. In this graph the constant is 100.

Windrose

A wind rose is a graphic tool used by meteorologists to give a succinct view of how wind speed and direction are particularly distributed at a particular location. This wind rose is data recorded from Yakima, WA.

Climograph


A climograph plots monthly average precipitation and temperature for a certain location. It is a quick way to categorize climate for a certain region. This climograph shows the averages for Miami.

Population profile


Population profile contains current information on a wide variety of topics including national and state population trends, fertility, poverty, households and families, etc. This particular profile shows the occupational distribution of employed persons in 1994.

Scatter plot


A scatter plot is used to investigate the possible relationship between 2 variables that both relate to the same event. This plot examines the correlation between Beta testing and the SAT.

Index value plot


The index value plot is a good way to show comparison between 2 related values. This plot compares the 7-day average streamflow value to the historical value for the day of the year.

Sunday, December 7, 2008

Lorenz curve


A Lorenz curve is a graph used to show the concentration of ownership of economic quantities such as wealth and income. The graph above shows the income distribution in Scotland between the years 2000/01 and 2005/06.

Bilateral graph


A bilateral graph is a graph that shows two variables. This graph shows the competition of the International Telecommunication Unit countries for various services.

Univariate choropleth


A univariate choropleth map represents data dealing with one subject. This map shows the percentage of individuals living in poverty in the U.S. by county in 2000.

Bivariate choropleth


A bivariate choropleth map shows two different variables and how they are related to each other. This map shows how land use and GNP per capita in Africa in 1989 are interrelated.

Unclassed choropleth



An unclassed choropleth map has no classes. Shading or color intensity is used with the highest intensity representing the highest value and the lowest intensity representing the lowest value with various shading in between.

Classed Choropleth Map



A choropleth map of Armstrong County, PA representing the percentage of the population under 5 years old using the quantile method of classification.

Monday, December 1, 2008

Range graded proportional circle map


A range graded proportional circle map uses circles to represent a certain value. Each circle represents a specific value and the circles range in size. For example a smaller value would be represented as a small circle compared to a large circle for a larger value.

Continuously variable proportional circle map


A continuously variable proportional circle map uses circles to represent certain values on the map. This particular map is showing the number of internet users in Europe in the year 2004.