nominal area choropleth map
This is an example of a nominal area choropleth map. The map illustrates a nominal data set over space. It shows the number of votes from each ward and who the majority of votes for that ward went to.
Saturday, December 4, 2010
nominal area choropleth map
nominal area choropleth map
This is an example of a nominal area choropleth map. The map illustrates a nominal data set over space. It shows the number of votes from each ward and who the majority of votes for that ward went to.
Classed Choropleth Map
classed choropleth map
This is an example of a classed choropleth map. We can tell that it is a classed choropleth map because there is a legend with a set number of classes and each area on the map is placed within one of the set classes.
un-classed choropleth map
un-classed choropleth map
This is an example of a choropleth map that is un-classed. This map would be considered un-classed because the data that is shown is not broken up into different classification groups. The data gradually goes from high to low but there are no set number of classes to specifically put each county in.
Bivariate choropleth map
bivariate choropleth map
This is an example of a bivariate choropleth map because it is a choropleth map that shows more than one variable. In the map it shows the difference in the worlds climate and also the effect that latitude has on climate.
univariate choropleth map
univariate choropleth map
A univariate map is a map in which a single variable is illustrated. In this map we can see that the map focuses solely on the amount of biomass resources in the united states. We can see on the map that the areas with the most resources available are the areas that heavily rely on agriculture such as parts of the midwest and areas of the south.
range graded proportional circle map
range graded proportional circle map
This is an example of a range graded proportional circle map. The data shown on the map is range graded because the cartographer uses different size circles to help show the analyst the difference between the classes. In this map you can see the density of Mexicans in the united states between the 50 states.
Box Plot
Box plots display differences between populations without making any assumptions of the underlying statistical distribution: they are non-parametric. The spacing between the different parts of the box help indicate the degree of dispersion (spread) and skewness in the data, and identify outliners. The box plot above is displaying blood pressure among different groups of people.
Bilateral Graph
A bilateral graph depicts increases on one side of a zero line and a decrease on the other side. Bilateral graphs are used to display data when there are both positive and negative values. This bilateral graph shows the relationship between long term mortgages, and construction and development loans from the FDIC.
Index Value Plot
An index value plot is another type of visualization map. An index value is plotted on a line graph. The image above shows an index value plot for the Arms Index. This is an index that deals with stocks and trading(also known as the traders index).
Classed Choroleth Map
With classed choropleth map the main objective is to determine height and shading or color intensity of the bar for each map classed. This would involve creating a classed frequency legend including a frequency histogram, a frequency curve, and shading. You can tell by looking at the image above that the different shading show different classes of deaths per capata based on age.
Friday, December 3, 2010
Isobars
Isobars are lines on a map that connect areas of equal atmospheric pressure. These lines are often used in meteorology on weather forecasting maps. The image above shows isobars around an area of low pressure up in the great lakes areas. You can see that at all points along this line, the atmospheric pressure is equivalent.
DLG
DLG stands for digital line graph. It is a type of map created by the USGS that contains vector representations of cartographic images derived from other maps and related sources. They can include information from the USGS planimetric map base categories such as transportation, hydrography, and public land survey boundaries. Above is a DLG image of the Lake Tahoe area.
DEM
A DEM is a digital elevation model. It is a map that digitally projects ground surface topography or terrain. DEM’s are commonly built using remote sensing techniques but can also be built from land surveying. The DEM above is a map created by the USGS. It is showing the topography of the Lake Tahoe Basin Area.
DOQQ
DOQQ maps are digital aerial images that the USGS produces. DOQQ stands for digital orthophoto quads. They contain orthorectified aerial photography. All of the images have a resolution of one meter. There are also different types of DOQQ maps. The one above is a color infra red image, of Johnston county North Carolina.
Thursday, December 2, 2010
Parallel Cooridinate Graph
A parallel coordinate graph is a graph that is used to plot multivariate datasets. It is designed with each variable having its own y-axis. The creator then chooses a maximum point for each y axis, and scales the others relatively to each other. Above is an image of a parallel coordinate graph this is showing all cells of drosophila and nine selected genes.
Lorenz Curve
A Lorenz curve is a graph that is used for showing the concentration of ownership of economic quantities such as wealth and income. The image above shows the levels and age distributions of mortality for three different female populations.
Windrose
A wind rose is a meteorological diagram that depicts the distribution of wind direction and speed at a location over a period of time. These can be very useful when observing weather patterns in an area. The picture above is an image of a wind rose that was constructed using data from a city a Maine. By looking at this image for just a moment you can see that there are predominantly north westerly winds in this particular area.
Correlation Matrix
A correlation matrix is very similar to a similarity matrix, except that it shows the correlation between all pairs of data sets. The picture above shows a correlation matrix that was calculated for a protein for phage7 (dealing with genetics).
Similarity Matrix
A similarity matrix is a matrix of scores which expresses the similarity between two data points. Above is an image of a similarity matrix dealing with behavior clustering.
Population Profile
A population profile is a type of map that shows the number of people in an area as a function of their ages. This is also many times referred to a population pyramid.
The image above is a population profile of the United States over a period of time and projected into the year 2015. With this image you can see how the structure of our population is changing over time.
Isopleths
Isopleth maps are maps that use contour lines to connect areas of equal elevation. There is usually a scale that shows the distance between two of the contour lines equal to so many feet. This makes it easy to also look at the steepness of slopes on a topographic map. Because the closer the isopleths are, the steeper the slope.
These are examples of isopleths maps with an interval of 10. This means that the distance between each line on this map is ten feet.
isopleths
Wednesday, December 1, 2010
DRG
DRG maps are short for Digital Raster Maps. These are maps that are scanned images of USGS standard series topographic maps. The image that is inside the map’s neatline is geo-referenced to the surface of the earth and fit to the Universal Transverse Mercator Projection. The horizontal positional accuracy and datum of the DRG matches the accuracy of the datum of the source map.
This is a DRG image of Bushkill PA.
Isopach
An Isopach is a line on a map of the Earth's surface connecting points where a rock stratum has equal thickness. There for an Isopach map is one in which lines or different shading is used to display areas where the stratum is of equal thickness. This is an Isopach map that is showing the areas off of the coast of the Pacific Ocean. The areas, in which the shading is the same, are areas where the stratum is equivalent.
Isohyet
Isohyets are maps that are designed to show the viewer areas of equivalent rainfall. On isohyets, lines are used to connect areas of equivalent rainfall. In this image you can see the United States. Different areas are connected by varying colors of lines depicting rainfall. This is an image created my NOAA on Saturday June 12, 2010.
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