A Statistical
Map is a type of map that shows the variation in quantity of a factor in the
area or geographic location. Three main types include a choropleth map,
proportional symbol maps, and to map. These maps make it easier to relate info
to a certain location. An example of this is the map above. It shows the
resident population for each state in the U.S. in the year 2000 from the census.
This is shown with shading of greens with a legend to define the interval for
each shade.
Saturday, March 22, 2014
Doppler Radar
http://www.srh.noaa.gov/tlh/?n=event-20110327-hailstorms
Doppler Radar is a specialized radar system that uses the
Doppler effect as a tracking system to determine the location and velocity of
clouds, storms, precipitation, and more. It shows change over a span of time.
An example of this is shown above. This example shows a Doppler radar image of
Miller county, GA moments before 1.75 inch hail was produced. The legend on the
edge shows the intensity which is defined by the colors.
Correlation Matrix
http://yin.che.wisc.edu/images.htm
A correlation matrix is a matrix between all pairs of data
sets. An example of this is shown above. This is a correlation matrix of phage
T7 proteins. The behaviors are shown from high displayed in red, to low
displayed in blue. The red blocks that form a triangular shape are shown to be
highly correlated because they are involved in phase assembly process.
Star Plots
A star plot allows the viewer to compare multiple variables.
Each star represents a single observation. An example of this is shown above
and shows a star plot of automobile data. Each star represents a car model, and
each ray represents a variable and is proportional to that variables value.
Scatter Plot
http://onlinestatbook.com/chapter4/intro.html
A scatter plot is a graph that plots two values along two
axes. The scatter pattern demonstrates the correlation between the two
variables. A trend line demonstrates what the general pattern is. An example of
this is the chart above which displays the wife’s age versus husband’s age. The
dots represent each value and the graph shows a strong positive correlation
between the two values.
Histogram
http://en.wikipedia.org/wiki/Histogram
A histogram is a map of distribution of data. It represents
the frequency of a specific event happening. An example of this is shown above where the heights of black
cherry trees are plotted on the histogram. It is seen that 10 trees were found
to have a height of 80 feet.
Windrose Maps
A windrose is a symbol that shows the direction and wind
speed in a particular location. This is mostly used by meteorologists. This is
an example of a windrose of Raleigh-Durham from 1948 to 2013. The legend
demonstrates the colors designated to each speed and the slices demonstrate the
direction that can be found using the coordinate system. So most of the wind
was found to be in the SW direction with and average speed if 7.12 mph.
LIDAR
LIDAR , light detection and ranging, is used to create high
resolution maps. It is a remote sensing method that uses light as a laser to
detect varying physical features. This is an example of a LIDAR map of the
Interstate 510 Bridge in New Orleans taken in 2012. This uses the light lasers
to map this area and will be used to detect any flooding in urban areas
impacted by Hurricane Isaac.
DOQQ
http://lacoast.gov/maps/2005doqq/
DOQQ are aerial photographs or satellite imagery that are
digital. Each quarter covers one of a quadrangle. They are corrected to line up
with longitude and latitude lines. This is done due to the relief and the
camera angle. This map is an
example of DOQQ imagery of Louisiana after Hurricane Katrina and Rita in 2005.
This map is provided by USGS and was used to show the damage and to gain more
assistance in hurricane recovery.
Box Plot
http://nelsontouchconsulting.wordpress.com/2011/01/07/behold-the-box-plot/
A box plot is used most for displaying statistical
information and comparing data. It is made up of box and whiskers. Measurements
of the average, maximum, minimum and the average dispersion are things shown on
a box plot. This is an example of boxplots and it demonstrates the market for
Engineer compared to Market Base salary. Boxplots help in determining the range
of the data and compare it another set of data and see where it falls within
those values.
Stem and leaf plot
http://mainland.cctt.org/mathsummer/josephbond/stemandplots/stem-and-leaf_std.htm
A stem leaf plot organizes a set of numbers or data to make
it easier to read or understand.
The digits in the greatest place value are plotted in the left column
(stem) and the digits in the next greatest value is the plotted in the right
column know as the leaf. This is an example of a stem and leaf plot demonstrating
infant mortality rate in western Africa. The greatest place values are placed
in the stem column and the lowest is placed in the leaf column.
Proportional circle map
http://geographyfieldwork.com/DataPresentationMappingTechniques.htm
A proportional circle map shows values using a circle as a
symbol. The area of the circle is in proportion to the size of the value being
shown. This is an example of a proportional circle map. It was taken of Czech
Republic and displays the common languages with different sized circles and
colors. Each slice represents the proportion of those that speak that language.
Isopleth Map
http://geographyfieldwork.com/DataPresentationMappingTechniques.htm
Similar to an isoline, an isopleths is a continuous line
connecting two points of the same value together, representing a third dimension.
This map is an example of an isopleths map and shows gradual change over space.
This map demonstrates the precipitation on the 10th of June in 200.
Each value is represented by a different shading of blue and delineated using
isopleths or isolines.
propaganda map
http://www.learnnc.org/lp/editions/mapping/6434
A propaganda map is a map created with the goal to help a
certain cause and persuade the users to think or see something a certain way.
This map is an example of a propaganda map and was made during the cold war. This
map is a displays the USSR as being larger than Africa which gave the
perception of the USSR taking over Europe and having their armies spreading all
over Europe. This was done with the intentions to make users of the map to
support an increase in military spending.
DEM
http://www.satimagingcorp.com/svc/dem.html
Digital Elevation model displays an image of regularly
spaced grid of elevation points. It uses a three dimensional geodetic system
with the x-axis as easting’s, y axis as northing’s and z axis is the
elevation. This is an example of a
DEM and displays an image of Eritrea Africa. This is an IKONOS image, which
means the data, is from IKONOS satellite sensors.
Flow maps
http://euclid.psych.yorku.ca/SCS/Gallery/milestone/Test/thumb5/popup/bssn1_popup1-29.htm
Flow maps show the movement and
path of objects from one location to another. This map shows transit routes of
pedestrians through shaded lines and the density is demonstrated by the
thickness of the line. This is one of the first published flow maps made.
Dot distribution Map
http://lewishistoricalsociety.com/wiki2011/tiki-read_article.php?articleId=6
Dot Distribution maps shows the location of a certain type
of feature by using a dots as a symbol. The scatter pattern of the dots
demonstrates the spatial distribution of the feature. This map is of cell phone
tower locations in the US. It can be seen that there is more concentration of
cell phone towers in the east then in the west side of the US.
PLSS
http://www.co.pacific.wa.us/gis/desktopgis/web/index.html
Public land surveying system is a rectangular surveying
system mapping method, which is used to identify land, parcels before townships
and ranges are identified. It divides areas into townships and ranges. This is
an example of a PLSS map of Pacific county in Washington. The townships are
labeled on the vertical axis and the ranges are located on the horizontal axis.
Cadastral Map
http://www.gpem.uq.edu.au/graphic-presentation-maps
Cadastral
maps show the boundaries of land parcels in an area. It usually includes
details of who owns what and the actual description of the boundaries as well
as the parcel id. This map is a cadastral map of Montgomery County taken in
2010. It shows the boundaries of each parcel as well as information.
Mental Map
http://ocw.mit.edu/ans7870/MAS/MAS.965/f04/assignments/tripti/Assignment10/index.htm
A mental map is a map made of one’s own perception and
knowledge of an area that they have interacted with. Nothing is to scale and
the map of the same area made by another person may look completely different. This
map is drawn from the perspective of Francis of Cambridge, Boston. It shows his
perception of where different landmarks and places are and uses his own
symbolism to represent each place.
Tuesday, March 11, 2014
Univariate Choropleth Map
http://visualizingeconomics.com/blog/2007/08/11/united-states-poverty-map
This map is an example of an univariate choropleth map. This map shows one type of data set value and uses different shading from yellow to red to show the concentration. This map plots the income in % of the United states. This map specifically shows the % living in poverty.
This map is an example of an univariate choropleth map. This map shows one type of data set value and uses different shading from yellow to red to show the concentration. This map plots the income in % of the United states. This map specifically shows the % living in poverty.
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