This histogram shows elevation on the left and the tick marks on the bottom indicate 10% of the earth's surface. Histograms allow for distinct numerical measurements to be replaced by frequency.
Saturday, September 4, 2010
Bivariate choropleth maps
Bivariate choropleth mapping allows for two different variables to be shown in the same geographical location by giving each variable its own distinct representation. The above image shows the population of a region in 1997 and the median house value in the same region. The differing variables are contrasted by using pink spots for population and green spots for median house value, each spot larger with numeric increase.
Doppler Radar
Doppler radar uses microwaves that are sent from the radar outward where they interact with water particles and the information is sent back to the radar where the data is computed to where an image is produced which shows the frequency, or denseness of the water and tracks it to show how fast it is moving and in what direction as well as the temperature of the water. With doppler radar it is possible to differentiate between snow, sleet, and rain as well as tracking its motion. The most important information which comes from dopplar radar is the tracking of storm cells in order to see if a tornado is forming, and where, or to track the strength of a hurricane from a distance..
Flow map
This flow map shows the migration of people from California from 1995 to 2000. Flow maps are used to show how things move from one place to another, or as in this case, from one place to many others.
Statistical maps
These statistical maps show how the "spread of the internet" happened between 1991 and 1997 when the study expired. Statistical maps can give from a regional or local to a worldwide view of how there is a rise or decline in pretty-much anything. This style of map can be used to show the frequency of violent crime or the literacy rates and can be as broad-spread as the data can produce.
Bilateral Graph
This bilateral graph shows the U.S. trade deficit in relation to India's GDP from 1980 until 2005. Bilateral graphs are extremely useful when relating two equal or opposite factors which are data-based, and showing how they relate to each other, especially over a period of time. A similar graph could be created which shows the U.S. debt during one president's time in office shown against another's or the amount of a pollutant during one decade and the same pollutant during another decade. This form of graph gives the viewer an opportunity to see how things change depending on different time-frames.
Cartographic Animation
This is an example of cartographic animation. In this image; the stages of flooding are shown as the waters continue to rise for the Tar River basin in North Carolina. Cartographic animation is typically taken from historical data and is not an exact science but can be a useful tool when planning for natural or man-made disasters. The data used to create this animated map is from September 1999.
Mental Map
A mental map is a person's internal perception of their own world and is unique to each person.
This mental map is taken from a sixth-grader's artwork as part of a program designed to find how children think of their environment. The first picture shown on the link has more of a topographic view of the neighborhood, but this image seemed more interesting as it shows how an abandoned house, and probably what goes on in this abandoned house, has an impact on a small child.
This mental map is taken from a sixth-grader's artwork as part of a program designed to find how children think of their environment. The first picture shown on the link has more of a topographic view of the neighborhood, but this image seemed more interesting as it shows how an abandoned house, and probably what goes on in this abandoned house, has an impact on a small child.
Topographic Map
A topographic map is, according to the University of Washington, maps which, "Render the three-dimensional ups and downs of the terrain on a two-dimensional surface, through the use of contour lines to portray the shape and elevation of the land."
This is a topographic map with the Ukraine region highlighted. This map has major cities marked as well as a dimmer view of bordering nations and bodies of water. Notice the change in color as the type of terrain changes. Blue would symbolize water; green-vegetation, etc. The white lines are symbolic of the borders between the nations and the mountain range, through Romania and the Ukraine, is marked with a powdery white, as the mountains are topped with snow because of the frigid conditions found at that altitude.
The website below is for reference purposes for information gained by the University of Washington's website:
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