A bivariate chloropleth map displays two variables on a single map by combining two different sets of graphic symbols or colors.Two-variable choropleth maps can be used as a useful tool for visualization of geographical relationship. The map above depicts the percentage of population under the age of 18, and also the percentage of the general population.
This technique assigns shadings proportional to the data values so that these choropleth maps do not have to classify the data. The map here is of fertility rates in Africa.
A Classed Chloropleth Map uses smaller variables than a general chloropleth map to portray data, which is broken down into scale. This map depicts the population densityof New England.
The Lorenz Curve is a graphical representation of the proportionality of a distribution. It represents a probability distribution of statistical values, and is often associated with income distribution calculations and commonly used in the analysis of inequality.
A digital orthophoto quadrangle (DOQ) is a computer-generated image of an aerial photograph in which image displacement caused by terrain relief and camera tilt.
A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) standard series topographic map, including all map collar information.
An isopach map is a map illustrating variation of thickness within a stratum in the atmospere. The lines on an isopach map are contour lines of equal thikness over an area.
An Isotachs Map shows where areas and what the wind speed isin that area. The Isopachs are lines on a given surface that connect areas withsame wind speed.
LIDAR, or light detection and ranging, uses optical remote sensing technology that measure properties of scattered light to find range and/ or other information of a distant target. It is a remote sensing technique similar to radar.
Monthly precipitation and temperature conditions for a selected place can be compiled and revealed in a Climograph. The bar graph potion of the graph represents the precipitation, while the line graph represents the temperature. Having these two data sets in one image makes it simple and easy to correlate the two bits of information. http://www2.volstate.edu/kbell/BrazilClim.jpg
Dopplar Radar Maps show velocity data and objects at a distance by using Doppler radar. Microwaves are projected out into the atmosphere (or at any object) and then the reflected waves are analyzed. Meteorologists use Dopplar to create these Doppler maps that we can see everyday on the weather channels.
A histogram represents information in tabular frequencies. In this example there are adjacent rectangles, which represent frequencies over an interval.
Box Plots are nicknamed "whisker plots" and graphically depicts numerical data through five number summaries. Box Plots are non-parametric and can be used to display differences in populations without making underlying assumptions about the underlying statistical distribution.
Statistical maps represent any given statistic value relative to the area, spatially on the map. It allows the reader to have a "big picture" take on the values represented.
A Cartogram represents statistical data geographically on a map. What would normally represent land area on a map is replaced with some sort of thematic mapping variable. This is a representation of each state in the US and what political party the majority of the population in that state claims.
A flowmap can be used to show movement of just about anything, both tangible or intangible To the right is a flow map representing the flow of exported French wine in the year 1864.
A proportional circle map uses circles that are portioned out to represent a quantity. It is a visual aid that organizes information so it is fast and easy to portray the idea to the reader. This circle map reveals how each industry in Germany is proportioned out.
A Chloropleth Map uses shading or color to represent values in each area sectioned in the map. As you can see in the example above, divorce rates are represented and their distribution.
Maps in which political information is embedded to sway the reader is an example of a propaganda map. These maps can be used to intimidate, or empower the reader.
This hypsometric map shows elevation and relief by using shading. Hypsometric colors are most common in topographic maps at small scales, either applied as continuous gradients or intervals
A PLSS Map is a Public Survey System map. It is a coordinate system which devides and subdevides the land use in the US. The Bureau of Land Management is responsible for regulating and maintaining the system.
A cadastral map is a map that shows how parcels of land boundaries are devided up, or measured out. It reveals the layout of property ownership. This is an example of a cadastral map.
Historical maps are generaly political maps, but can be any map in which an area's past has been depicted. It is very usefull in comparing to an area's modern construct in order to clearely compare the two and the changes that have occured over time.
Thematic maps are used to provide specific information about particular locations, show general information about spacial patterns, and can be used to compare data of two or more maps.
'The Star Plot is a map used as an analysis technique. It plots information such that it makes a visual in which behavior of all relative variables in a data set can be examined at once.
Mental Map A mental map is a map one is able to recollect from memory. For example, you recall directions, as an adult, in your childhood neighborhood to the lake you used to enjoy visiting.
This is a black and white aerial photo of Pottawatomie County. The aerial photo allows people to view the topography of an area and a broad perspective of the layout of the land.