In unstandardized choropleth maps the data is not averaged, whereas in standardized choropleth maps it is. The boundaries for these types of maps are usually derived from the U.S. census. This type of map also usually utilizes a single color scheme.
This map shows Center for Disease Control data for the United States. A univariate choropleth uses one color scheme to represent only one data set on a map.
This map shows population density in 2002, and percentage population change from 1989-2002 in Russia's Central Federal District. A bivariate choropleth map displays two variables on a single map by combining two different sets of graphic symbols or colors.
This map shows lightning strike density per square kilometer within the continental United States for the years 1996-2005. An unclassed choropleth is designed to show statistical data in a multi-colored value moving from smallest to largest, using lighter colors to portray smaller values and using progressively darker shades to portray progressively greater values.
This map shows males per 100 females in the United States. A classed choropleth portrays varying statistics that occur within specified boundaries.
This map shows EID events throughout the world. We can see that the majority of them occur in the U.S, and most of the occurrences in the U.S happen in the Northeast. In range graded maps, it is all about symbol size. The data are divided into categories, where the map reader can easily distinguish one class from the other.
This map shows percentage of major industry per area of Germany. A continuously variable proportional circle map is a proportional circle map which utilizes circles to create point data. This relates the scales to the specific data. The circles are in proportion to the variable being measured.
A DOQQ is an aerial photograph geometrically corrected so that the scale is uniform, therefore the photo will have the same lack of distortion as a map.
A DEM is a digital representation of ground surface topography or terrain. They are built using remote sensing techniques, and can either be raster or TIN format.
Digital line graphs are digital vector representations of cartographic information. They are drawn from aerial photos, or other cartographic information. Thet can be represented in either large scale, medium scale, or small scale.
A DRG is a scanned image of a USGS topographic map. The map is georeferenced to the earth and can be used for navigation purposes.
This isopleth map shows hydrogen ion concentration(as pH) made at field labs across the U.S. An isopleth map connects points that share the same numerical value of some variable.
An isopach map connects points of equal thickness in a given area. Isopach maps are used in structural geology, sedimentology, and volcanology.
This Isohyet map is of rain gauge station data in Hong Kong. An isohyet is a line connecting points of equal precipitation.
This isobar map shows sea level pressure for a given study area for the UK and Ireland. Isobars are lines of equal pressure, and joins points which share that share values.
This LIDAR image is of ground zero in New York City. LIDAR stands for light detection and ranging, and is used to determine heights of features on the earth surface from an aerial perspective.
This is a Doppler radar image of central Florida during a hurricane. A Doppler radar uses sound waves to visually depict weather patterns. Weather casters use this technology to predict and explain weather.
This black and white aerial photo shows an birds eye view of a city. These photos are only used by few, as now we have color, infrared and many other aerial sensing techniques.
Image Source: http://www.fas.org/irp/ imint/docs/rst/Sect21/BloomAerial4.JPG
In this infrared photo, you can see this city from an aerial perspective. The infrared camera captures light in the invisible infrared band of light. Geographers will usually use infrared to study land cover and plant nehavior.
Image Source: http://www.onlakepartners.org/gif/p1101d.gif
This map shows the percent change in metropolitan area population for the United States.
Image source: http://www.census.gov/popest/ gallery/maps/map_20002005.jpg
Image Source: http://www.electoral-vote.com/evp2007/Pres/Carto/Dec27-c.png
Image Source: http://www.lib.utexas.edu/maps/ texas/combtrk_tx_1998.jpg
Image Source: http://www.learner.org/jnorth/images/ graphics/u-z/weather_isotherm032401.gif
Image Source: http://www.neiu.edu/~ambarda/ proportional_circle.jpg
Image Source: http://water.usgs.gov/ watuse/graphics/domap.st2.color.gif
This dot density map shows the population density of the United States, where 1 dot=7500 people. This type of map is used to represent a certain category of data, and project it in an easy and attractive form.
This propaganda map shows the United States colored according to how each county voted in an election. maps such as this can be used to sway people's thoughts, and for personal gain of creator.
This hypsometric map shows Scotland in great detail. A hypsometric map depicts the earth's surface with the use of shading, contour lines, tinting, or relief models.
This is a PLSS map showing different survey and land partitioning districts. The PLSS (Public Land Survey System) is a way of describing and subdividing land in the U.S.
This cadastral map shows a section of a city with colors representing different kinds of ownership. A cadastral map is a legal map that describes boundaries and ownership.
