A Classed Choropleth Map differs from an unclassed map in
that intervals are created to display the data in a more simple manner. The
number of intervals created can vary. Another thing that can vary is the way
data is divided up into intervals. The classed choropleth map above shows a one-year forecast change in jobs for 2010 verse 2009. The data is divided
into six intervals with a different color for each.
Tuesday, April 16, 2013
Nominal Area Choropleth Map
Nominal Area Choropleth Maps are used to display nominal data. These types of maps use different colors or patterns to distinguish between certain areas or regions. Usually there is no ordering (or ranking) of the data. But this map strays away from that rule. This nominal area choropleth map should which regions have access to safe drinking water.
Bivariate Choropleth Maps
This map is called a Bivariate Choropleth map of the United States which shows where many of our Olympic Athletes come from. A Bivariate Choropleth map uses two variables and different shading to show concentration of those variables.
Range Graded Proportional Circle Map
Range Graded Proportional Circle Maps show a selected range of values that correspond to the charting of the number of occurrences on the map. This map shows the populations of Filipino's in the Southeastern United States in the Year 2000. I like this maps because they are easy to interpret and fun to look at.
Unclassed Choropleth Map
Unclassed Choropleth Maps assign shadings proportional to the amount of data rather by a key with percentages or numbers of occurrences. This maps will usually just show the area with no other help from keys like we normally see on maps. This map here shows the reading literacy rates in France during 1826.
Univariate Choropleth Map
Univariate Choropleth Maps only show one variable or one single attribute. This map shows the occurrence of a single variable. The darker areas show high concentration. These maps are useful when studying only one factor.
Unstandardized Choropleth Map
Unstandardized Choropleth Maps are usually used to show distributions of a variables. It lacks standardization and is not an average. This is a map of number of canoe shops by county around the Great Lakes. The darker colored shapes are more concentrated than the lighter ones.
Parallel Coordinate Graph
A Parallel Coordinate graph is a way of viewing high dimensional geometry and analyzing multivariate data. A parallel coordinate graph charts coordinates or variables of data points on an axis. Lines then connect these points to make a complete graph. Many of these maps are used to show budgets.
DEM
DEM maps are used to show elevation of Earth's surface. DEM is usually used by the USGS especially in studying large volcanoes and mountains. This DEM image is a photo of Mount Saint Helens after the explosion.
DLG
DLG maps are also known as Digital Line Graphs. These are cartographic maps that are used by USGS to survey land. They usually have nine different categories of features depending on its' scale. There are two different formats; optional format and Spatial Data Transfer Standard (SDTS). This map shows the elevation of the country.
DRG
This is a DRG map also known as a Digital Raster Graphic map. DRG maps are scanned images of a USGS topographic map for use on a computer. It usually includes the original border information also known as "map collar." This is a map of the Potomac River area from the USGS survey.
Planimetric Map
This is a Planimetric Map of Paris. These are your everyday maps that people use to find their way around certain areas. They can highlight key buildings and areas that are important to that region. I choose this Planimetric map because I will be traveling to Paris this summer!
Mental Map
Mental Maps are basically anything that you think of as a map in your head. These types of maps are usually very creative and is easily read by the creator. Mental maps are good to use to organize your mind and to remember important points.
PLSS Map
PLSS stands for Public Land Survey System. It is used to divide public domain land which is owned by the Federal Government. They are rectangular in shape and helps organize every state and part of the country into easily accessible areas. The PLSS is monitored by the Department of Interior.
LIDAR
Lidar stands for Light Detection and Ranging or Laser Imaging Detection and Ranging. This technology is remote sensing that measures the distance to targets by illuminating the target with laser light and analyzing the backscattered light. This remote sensing is used in many different fields of study. This LIDAR map is the one of ground zero in New York.
Black and White Aerial Photo
Black and White Aerial photos are useful when reviewing an area. They can show major buildings and roadways that are prominent in the area. I think that these are a little outdated compared to what we have today from the development of technology but still useful somewhat.
Infared Aerial Photo
An
infrared aerial photo uses wavelengths that the human eye cannot see. These
photos are used by many different institutions; including the Environmental
Protection Agency and military. They are beneficial for the environment because
it is an easy way to observe fire damage and to track chemical spills. This
photo is a valley in the state of California monitoring pesticide amount in the
soil.
Cartographic Animation
This is a cartographic animation of the retreating glaciers at Glacier National Park. Cartographic animations are helpful tools that help us compare data over a long period of time. I think they are very useful in environmental science and land conservation. I choose this animation because Glacier National Park is one of my favorite parks and it is determined that once huge glaciers of this park will be out of existence by the year 2020.
Isoline Maps
Isoline
maps show lines connecting points of equal value. They can be on graphs,
charts, and other different kinds of maps. These types of lines (maps) are very
common and easy to read. This isoline map shows temperatures throughout the
United States.
Proportional Circle Maps
A continuously variable
proportional circle map is a proportional circle map, which utilizes circles to
create point data for quantitative data.
The circles are in proportion to the variable that is being measured not
exactly the area over which it is measured. For this Proportional Circle Map
these circles both red and blue show the amount each county’s leading candidate
was ahead in 2008. These maps are useful when looking at data that occurs in
large amounts and effect many areas
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