Tuesday, August 5, 2008

STATISTICAL MAP

After taking another look at what a statistical map is really about, I realized that the one I first posted does not really qualify. However, based on the definition from our slides, this map (aka cartogram) can be called statistical because the shape and size of each country is based on a statistic - percentage of the population who are female agricultural workers. It looks like most of them are concentrated in undeveloped or developing countries while developed countries like the US have a lower percentage. This website has a great collection of this type of map.

Link to website source:
http://ifyouonlyreadonethingthisweek.wordpress.com/2007/11/01/world-mapper-re-invisioning-the-world/

Monday, August 4, 2008

PROPAGANDA MAP

I added another propaganda map because the one I posted early in the term is included in the slides for week 11. This one may just be a humorous response to another map which shows the southwestern states combined with Mexico to create the “new country” of Aztlan. It clearly defines and highlights Mexico (yours) and its borders while a message is boldly printed across most of the US (not yours). Most viewers would certainly get the point of this map and many would probably take offense.

Link to website source:

Sunday, August 3, 2008

CHOROPLETH MAP

I had to include one more choropelth map which illustrates the Muslim population in Africa, 2005. I think it could be considered classed because the data has been divided into intervals and standardized because the data has been areally averaged to get a percentage. Based on this graphic, the Muslims seem to be more concentrated in North Africa.

Link to website source:http://www.usip.org/pubs/specialreports/sr140.html

DOT DISTIBUTION MAP

This is just an interesting dot distribution map I found showing the principle cotton producing areas in Florida, 1850. I like the simplicity of the map and noticed a familiar pattern of the areas dominated by plantations today. This website has some great maps of Florida.

Link to website source:
http://www.luddist.com/map.html

STAR PLOT


This star plot is related to the parallel coordinate graph that I have in my map collection. It allows you to visually compare the ten variables for each vehicle type side by side. You can easily distinguish the variables for each type of vehicle and determine what is most important to you in choosing one of them.

Link to website source:
http://alumni.media.mit.edu/~tpminka/courses/36-350.2001/lectures/day38/

CORRELATION MATRIX

This gene to gene correlation matrix is part of an expression analysis from the Bioinformatics Group, CSIRO Livestock Industries in Australia. It indicates the strength and direction of a linear relationship between two random variables on a scale of negative one to one. The matrix contains a subset of the top 100 cancer genes with thick lines indicating the following blocks: A - extracellular matrix, B - nucleus and cell progression, C - actin cytoskeleton, D - fatty acid metabolism, and E - glutamine/glutathioine/oxidative.

Link to website source:
http://www.livestockgenomics.csiro.au/Genome_to_Phenome/

SIMILARITY MATRIX

A similarity matrix shows similarity between variables on a scale. They seem to be most popular in studying genetics but this one is being used to study temporal event clustering of digital photo collections and user retrieval times on a scale from zero to one. This matrix visualizes the temporal similarity of a collection of 512 photos.

Link to website source:
http://www.fxpal.com/?p=eventDetector

STEM AND LEAF PLOT

This is a very simple example of a stem and leaf plot showing the number of students enrolled in a dance class in the past twelve years. The number of leaves (12) is equal to the number of data items in the diagram. The total number of students is 1146 calculated by adding all the plotted the numbers (81, 84, 85, 86, 93, 94, 97, 100, 102, 103, 110, 111). The average and the median of these numbers are 95.5 students.

Link to website source:
http://www.highpointsmath.com/sitemap/Stem-and-LeafPlot.html

BOX PLOT

A box plot (box and whisker diagram) is used to present a simple graphical summary of a set of data. This one is comparing the hits on a specific website for each day of the week in 1999. It looks like the median number of hits is almost the same on Tuesdays and Wednesdays but Tuesday has the biggest dispersion of hits. Obviously more people visit this website during the week than on the weekends.

Link to website source:
http://support.sas.com/rnd/app/da/new/daunivariate.html

HISTOGRAM

This example histogram displays the tabulated frequencies of height (in feet) for a set of 31 black cherry trees. There are three trees in the 60-65ft range, three in the 65-70ft range, eight in the 70-75ft range, ten in the 75-80ft range, five in the 80-85ft range, and two in the 85-90ft range. Based on this sample, most of the trees are 75-80 feet tall and only a few are over 85 feet tall.

Link to website source:
http://en.wikipedia.org/wiki/Histogram

PARALLEL COORDINATE GRAPH

In this parallel coordinate graph/plot they have included five vehicle types on the vertical axis and although they are not all visible on the image, ten variables along the horizontal axis. The following variables are represented by dots along each line: MPG – highway, passengers, horsepower, wheelbase, price, length, turn radius/circle, engine size, weight, and width. All of these variables are easily compared for each vehicle type using this chart and relationships between the variables can be established. For example, as horsepower increases so does the price.

Link to website source:
http://alumni.media.mit.edu/~tpminka/courses/36-350.2001/lectures/day38/

TRIANGULAR PLOT

Although triangular plots are most often used to show the relative compositions of soils and rocks, it can be used for other systems combining three variables. Because I had to be different, I chose this one created in 2005 by someone estimating the probable outcome of the election in the UK. It reflects the estimated fraction of the population intending to vote for each of the following major parties: liberal democratic, labour and conservative. The current (at the time of this publication) estimate from opinion polls is indicated on the triangle by a white circle. The colored areas show the regions in which each of the corresponding major parties would win a majority in Parliament.

Link to website source:
http://ex-parrot.com/~chris/wwwitter/20050407-it_doesnt_matter_how_you_vote_either_way_your_planet_is_doomed.html

WINDROSE

A windrose, by definition from our slides, is a circular plot showing frequencies of different wind directions. This one is the current data from Holy Cross Airport Station in Alaska illustrating the hourly average wind data for July 28-Aug 3, 2008. If you look at the plot, the wind blew from the southwest about 19% of the time and never from the direct south or east. A simple graphic like this makes it easy to communicate data.

Link to website source:
http://www.yukon-watershed.org/yukon_river/stations/Holy_Cross/hcross.shtml

CLIMOGRAPH

This climograph is a graphic representation of the relationship between temperature and precipitation plotted at monthly intervals for a year in Manaus, Brazil. The blue line is precipitation in inches on the right axis and the shaded green bars reflect temperatures in degrees Fahrenheit on the left axis. These two variables seem to have an inverse relationship in Manaus reflecting slightly higher temperatures with less precipitation and a bit lower temperatures with more precipitation. The temperature does not fluctuate a lot in this area of the tropical Amazon region but they do have a wet season and a dry one.

Link to website source:
http://www2.volstate.edu/kbell/climographs.htm

POPULATION PROFILE

This is a population profile/pyramid displaying the age and sex distributions of British Columbia, Canada, 1996. It reflects a larger percent of the population falling in the middle age ranges between 35-49 years old. Based on this profile and information from the website, I would have to conclude that the fertility rates are decreasing and the death rates are decreasing. It might be interesting to see the current pyramid for this province and if the aging trend has continued.

Link to website source:
http://atlas.nrcan.gc.ca/site/english/maps/peopleandsociety/age/age1996/bc_graph.gif/image_view

SCATTERPLOT

This scatterplot shows the relationship between population and the gross domestic product (GDP) per state based on 2005 data. The red trend line reflects an average ratio for the US which generally indicates an increase in GDP relative to an increase in population. As you can see on the graphic, there are a few exceptions to this but there is a fairly strong, positive relationship between the two variables. The states that fall farther below and to the right of the average have healthier economic productivity.

Link to website source:
http://www.economics-charts.com/gdp/GDP-Per-Capita-scatter-plots.html

INDEX VALUE PLOT

An index value plot uses a calculated index value instead of an absolute number. This particular graph is using a woodland index value to plot the condition indices for three sample sites within the study area over a five year period. The focus of the project is on two sites within the southwest agricultural region of Western Australia and they used remotely sensed data. On this plot an increase in the index value is associated with a decline in condition so one site is getting better, one is getting worse and one has not changed.

Link to website source:
http://www.cmis.csiro.au/rsm/research/remveg/vegassess_all.html

Saturday, August 2, 2008

ACCUMULATIVE LINE GRAPH

In 2007, the "new government" of Scotland used this accumulative line graph (Lorenz curve) to show fairness in terms of income and promote their agenda of increasing wealth and fairness. This chart does show a slight increase in equality from 2000/01 to 2005/06 but can the perfect line be realized? Like in most places, I think this is a great concept or goal but a hard one to accomplish. The Lorenz curve is a great visual for realizing inequalities and illustrating how a small percent of the population earns a larger amount of the income.

Link to website source:
http://www.northlan.gov.uk/business+and+employment/local+economy/economic+information/economic+bulletin+8+-+policy+round+up.html

BILATERAL GRAPH

This bilateral graph dated 1991 displays the birth and death rates for Sri Lanka. These two related variables are combined to calculate the natural rate of population increase or decrease. Since the poorer countries of the world are seeing better public health, the death rates are dropping. Although a little behind, the decrease in birth rates may be attributed to better opportunities and education for women. It could also be related to health and lower numbers of infant/child deaths that might contribute to more births. Based on previous studies, most developed countries have experienced this type of trend and the developing ones probably have similar current graphs. These trends are the result of improvements in sanitation, better nutrition and access to medication/health care.

Link to website source:
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Populations.html

NOMINAL AREA CHOROPLETH MAP

Both of these maps are examples of a nominal area choropleth map showing Florida voting party trends from 2000. The cartographer was interested in loyalty/disloyalty across party lines. The top map shows that Bush (red) carried more “cross-over” counties than Gore (blue) in this election. According to one paper on this subject, using nominal level data is sometimes considered a less precise level of measuring variables. It seems like many of the political maps use nominal level data for public presentations. Maybe they are trying to make it “blue and red and simple all over” for ease of understanding.

Link to website source:
http://www.directionsmag.com/mapgallery/?MapId=124

UNSTANDARDIZED CHOROPLETH MAP

The 2001 Russian population is being represented with this unstandardized choropleth map. They are using the actual numbers without areally averaging them based on the size of each unit or division. This map is from the USAID website which has several different choropleth maps used to illustrate the need for aid in Russia. It would be interesting to compare the same map with population density and see what might change and what might stay the same. Many of the smaller regions have higher population figures so the density would most likely be high also.

Link to website source:
http://russia.usaid.gov/en/main/more_info/maps/

Friday, August 1, 2008

STANDARDIZED CHOROPLETH MAP

This map is a standardized choropleth map of potential years of life lost to prostate cancer in Southern Ontario, CA from 1997. The data has been areally averaged to get the number of years lost per 100,000 persons aged 0-74. According to the brief article, this student used Jenks Optimization to find a goodness of variance fit and to group the regional health units into classes. The map is simple and clean making it nice to look at and easy to interpret.

Link to website source:
http://www.directionsmedia.net/newsletters.archive/index.php?ID=417

UNIVARIATE CHOROPLETH MAP

Total acres of land in orchards is illustrated in this univariate choropleth map of the U.S. from 2002. The data is broken down into counties and only six categories are being used. I am not sure what type of classification technique they are using but maybe they started with natural breaks and then rounded off the numbers to make it easier to read. In 2002, Florida and California had a lot of acreage dedicated to orchards.

Link to website source:
http://www.nass.usda.gov/research/atlas02/index.html

BIVARIATE CHOROPLETH MAP

This map represents a bivariate choropleth map of Africa showing two variables, life expectancy and GNP per capita. It is a bit confusing to compare the chart and the map and figure out what is really what. Maybe the use of color for one and some type of pattern for the other would be easier to follow. There seems to be an interesting pattern of clustering in the north and south of high per capita combined with high life expectancy. The cartographer is also using a separate pie chart to show land use percentages which gives you another variable to consider.

Link to website source:
http://www.geocities.com/stevejford/new_page_2.htm

UNCLASSED CHOROPLETH MAP

This example of an unclassed choropleth map is illustrating the number of Internet users in Europe, by country. A continuous scale of limited colors is being used to represent the variable. It is hard to distinguish the color differences between some of the countries (areal unit) but they are each represented by one shade (interval). I think that a more diverse range of color might make this map easier to read and understand.

Link to website source:
http://www.esds.ac.uk/international/news/pastnews.asp

CLASSED CHOROPLETH MAP

Classed choropleth maps combine data into a smaller number of groups and portray them in intervals. In this example, the cartographer has divided the total range into four categories of equal intervals, encompassing all of the states. The content of this map is state level population data from the 2000 Census. It compares the number of males in the population to the number of females. The number of classes/groups and the classification techniques can really change the results and the appearance of these kinds of maps. This website has great maps and descriptions reflecting the importance of data collection, processing, aggregation and presentation of spatial information.

Link to website source:
www.ilstu.edu/~jrcarter/Geo204/Choro/

RANGE GRADED PROPORTIONAL CIRCLE MAP

A range graded proportional circle map divides data into groups, using classification procedures common to choropleth mapping. Symbol sizes are chosen for adjacent classes so the map reader can easily distinguish between categories (circles). This is a map showing the Filipino population across 13 states and the data was obtained from the 2000 US Census. It looks like a student created this for class but it is a good example of using range graded symbols to simplify a map. There are four circle sizes and the ranges look like he/she may have used natural breaks to determine the numbers. I have to wonder what the percentages reflect on this map.

Link to website source:
http://www.neiu.edu/~ejhowens/377/examples.htm

Wednesday, July 30, 2008

CONTINUOUSLY VARIABLE PROPORTIONAL CIRCLE MAP

This continuously variable proportional circle map has been published by the New York Times to show human West Nile Virus cases across the United States. The varied sizes of the circles relate to the specific number of cases (measured variable) in each state. If you consider how much water and mosquitoes we have in Florida, it looks like we were pretty lucky for this particular season and Colorado got slammed. The numbers and circles really stand out at this size but I would be interested to see the original printed version and if it would be this clear.

http://mapmaker.rutgers.edu/355/links.html

DOQQ

This is an amazing Color IR Digital Orthographic Quarter-Quad (DOQQ) overlaid with a thermal mosaic. It is basically a georeferenced and orthorectified aerial photo of the Colina Fire in Riverside County, CA September 10, 2007. By looking closely you can see where four DOQQs have been pieced together to get the entire area and you can also see the outline of the separate thermal image. The USDA Forest Service has this map and many others on their website to illustrate the use of a thermal imaging radiometer. The DOQQs are great because they allow for more accurate measurement of distance, areas, angles and positions which would be critical in a fire fighting situation.

Link to website:
http://www.fireimaging.com/fires/2007/california/colina/253/index.html

DEM

This digital elevation model, or DEM, of the Dundas Valley, in Hamilton, Ontario, CA has been colorized to bring out the relief. The lower elevation values are shaded in green while the higher ones are orange. It looks like they have overlaid the DEM with a layer of street data for reference. If this map is used for public display, the street data would certainly help give people a better understanding of location. By rotating this DEM you might get a better view of the elevations and really see the differences across the subject area. This site has some fantastic images and maps.

Link to website:
http://map.hamilton.ca/maphamilton/S_Files/aboutimages.aspx

DLG

A digital line graph (DLG) contains a wide variety of information like topography, hydrography, boundaries, roads, and utility lines. The data is in vector format and the map features are stored as points, lines, and polygons. This is a map of the 28,000 acre Tosohatchee State Reserve in Orange County, Florida which includes USGS DLG data to show the streams, rivers, lakes, wetlands, roads, railroads, power lines, buildings and other geographic and man-made features. It might also be classified as a hypsometric map because a third variable is represented by the use of different colors to delineate wetlands, water and land. There are also lines that may/may not be contours showing the shape and elevation of this area. The website has some great information about this reserve and several different detailed maps for public use.

Click twice on the map to get a large, clear image.

Link to website:
http://www.outintheboonies.com/Tosohatchee/

DRG

A digital raster graphic (DRG) is a scanned and georectified image of a USGS standard series topographic map. This DRG of Wyoming is a digital map product available for free download from the website listed below. It is not a very clear picture but you can make out the topography and use it for doing work in a GIS. Because it is georectified, it contains spatial reference information that will communicate the spatial location of features on the map. The raster format records, stores and processes cartographic data in a cell or pixel. Of course, you have to be careful with the sources for DRGs and make sure you know how they are georeferenced.

If you click the map twice the image is a bit clearer.

Link to website:
http://wgiac.state.wy.us/scripts/DRGMAP/DRGmap.aspx?Area_Type=250K

ISOPLETH MAP

According to one of our reading assignments, an isopleth is a line of equal value and contouring is the process of drawing isopleths. Several of the previous maps collected for my project could fall into this category. I think isobars, isotachs, isohyets and isopachs would all be considered isopleths. These maps are commonly used for mapping surface elevations, amounts of precipitation, atmospheric pressure, and numerous other measurements that can be viewed statistically as a third dimension. The map I have chosen is a good illustration of isopleth lines showing field pH levels recorded across the United States. It is listed by the North Fork Watershed Association in Brookville, PA as an example in the study of acid deposition and its relation to air pollution.

Link to website source:
http://nfwatershed.org/templates/System/details.asp?id=40322&PID=490669

ISOPACH MAP

An isopach map displays the stratigraphic thickness of a rock unit and is generally used in geological exploration for oil and for underground structural analysis. This particular isopach map created by the US Geological Survey is part of a reservoir characterization of the House Creek Oil Field, Powder River Basin in Wyoming. It is showing the thickness (in feet) of Sussex "B" sandstone. If I understand the illustration correctly, by looking at the small inset map of oil production, the higher producing wells are located where the sandstone is thicker.

Link to website source:
http://pubs.usgs.gov/dds/dds-033/USGS_3D/ssx_txt/all.htm

Friday, July 25, 2008

ISOHYETS

An isohyet is a line joining points of equal precipitation. This is a very pretty map of Tasmania showing mean annual rainfall in millimeters. It is obvious that rainfall is more concentrated in the southwest part of the state while the southeast is dry and the northeast has one area getting moderate rain. The prevailing wind pattern is from west to east, similar to the U.S., so the moisture is falling before it reaches the east reducing the chances of rain. I would like to see a map of the biomes for this area which are created and impacted by this climatic pattern. The source of this map is the Bureau of Meteorology, Hobart.

Link to website source:
http://soer.justice.tas.gov.au/2003/image/265/index.php

ISOTACHS

I chose this map to illustrate isotachs just because it is terribly obnoxious but does get the message across! The blue lines filled in with bright shades of green and yellow are connecting points of equal wind speed. They are using contours and color to represent the third variable and it certainly shows up on the black background. I did have to take a second look to see what the map was since the states are outlined in a very pale orange color and the white isobars look like they are on top of the other layers. It is interesting how both sets of contour lines follow a similar pattern starting in the north and making a sweep south and back up. This is a pretty neat comparison of the two variables together on a map dated October, 1996.

Link to website source:
http://www.atmos.washington.edu/~mcmurdie/oct96/oct96_labs.html

ISOBARS

This is a fairly simple but good map of Australia illustrating isobars and a few other weather symbols. The black contour lines labeled with numbers are connecting points of equal pressure across the map. The image came from the Australian Government website and is a clean, easy to read, representation of the weather leaving off an unnecessary detail to jumble the map. The little barb like symbols indicate wind direction and speed while the cross hatching reflects rainfall in the past 24 hours. Where the isobars are close together, change in the variable is larger and generally the winds are stronger. Around the high pressure systems the pressure is increasing quickly but around the lows the change is gradual. It looks like the four pressure systems and land mass are greatly influencing the wind patterns.

Link to website source:
http://www.bom.gov.au/info/ftweather/page_7.shtml

Thursday, July 24, 2008

LIDAR

LIDAR (light detection and ranging) seems to be the up and coming thing and I am sure this particular image has been used extensively. Most people should recognize the haunting illustration of Ground Zero taken in September 2001. This was a direct result of the terrorist attacks that reduced the World Trade Center to 16 acres of rubble. LIDAR is a remote sensing system using laser, instead of radio or microwave radiation, to collect topographic data. With LIDAR, scientists collect elevation figures and create false color images (not photographs) for visualizing information. Each image pixel represents a data (x,y,z) point that is colored according to its value. The points allow generation of a digital elevation model (DEM) of the ground surface and construction of a complete image.

Link to website source:
http://imaging.geocomm.com/gallery/

DOPPLER RADAR

I chose this Doppler radar, base reflectivity image of Tropical Storm Alberto, June 2006 because of the colorful display and great location. They have used vibrant colors against a very simple background which makes the storm really stand out. Doppler radar is tracking a circular motion in the clouds by pulsing the atmosphere with microwave radiation and measuring attenuation in the return pulse. With this technology they have calculated the size and types of particles in the air and created a color chart to show heavy, moderate, light and very light rainfall. They are also estimating the speed and direction of the air and watching for the possibility of tornadoes.

Link to website source:
http://www.srh.noaa.gov/tlh/wxevents/alberto061306.html

Wednesday, July 23, 2008

BLACK AND WHITE AERIAL PHOTO

This is an incredible black and white aerial photo of what they called the “Balloon Track Site” in Eureka, California. It was taken in 1952 by Merle Shuster when this facility was a fully operational railroad switching, maintenance and freight yard. This photo was part of a study conducted in 2001 showing evidence that the parcel was at one time a tidal marsh. It is now considered an urban brownfield and part of an environmental restoration project. The clarity and visibility of this “old” photo is amazing and I love black and white.

Link to website source:
http://online.redwoods.edu/instruct/colloquium/0607/

Tuesday, July 22, 2008

INFRARED AERIAL PHOTO

The colors in this infrared aerial photo of Onondaga Lake and the surrounding area drew my attention to this particular map. Most of the maps I have seen of this type use a similar color scheme but there are usually more pinks and reds reflecting the presence of vegetation. This map has a lot more shades of blue because of the water, streets and buildings in the frame. The city of Syracuse, NY partially surrounds this lake and its large population is evident in the abundance of man-made structures. This aerial is part of a website for The Onondaga Lake Partnership promoting a clean lake and fighting the obvious impact of pollution from the surrounding infrastructure and human intrusion.

Link to website source:
http://www.onlakepartners.org/p1101.html

CARTOGRAPHIC ANIMATION

This particular map is a non-temporal (not representing change over time) cartographic animation of Omaha, Nebraska. It reflects the spatial trend of population based on age groups across the city. Omaha’s early growth happened along the river which is the easterly border giving reason for the higher percentage of older people in this area while the younger ones are in the north and west parts of the city which developed later.

Link to website source:
http://maps.unomaha.edu/mp/Articles/GISLIS/VisAnim.html

Monday, July 21, 2008

NON STATISTICAL MAP

This map reflects the unequal distribution of phone lines around the world. The data is from 1992 and it uses different colors to represent the number of main lines per 100 inhabitants. I imagine the numbers are higher today but the variation between countries would probably be close to the same. This map is part of a minority telecommunications development program dedicated to developing programs and policies that increase minority ownership of broadcast and telecommunications businesses. The map is more clear when you click on it.

Note: I originally had this posted as a statisitcal map but upon further study, I realized, by slide definition, this one is not the type.

Link to website source:
http://www.ntia.doc.gov/opadhome/mtdpweb/outline.htm

CARTOGRAM

This map is a cartogram using population as the variable to determine the size and shape of each county in the Contiguous U.S. The distorted result is overlaid with outlines representing the actual size, shape and location of each county. This is a pretty abstract illustration of the U.S. but it certainly gives you a good picture of how the counties compare to each other in population.

Link to website source:
http://issrweb.asu.edu/services/gis/sample-maps.html

Thursday, July 3, 2008

FLOW MAP


This flow map shows migration from other states to California and New York. The flow illustrated by this map reflects more people moving from the East Coast to New York while California attracts people from more geographic regions across the country. It looks like the widths of the lines are in proportion with the larger or smaller number of people migrating from specific places. I would like to see this diagram or some version of it over laid on a map of the US so you could get a better idea about distances.


Link to website source:

http://graphics.stanford.edu/papers/flow_map_layout/


ISOLINE MAP


This is an interesting isoline map from an article published by ESRI about how GIS is being used in education. The isolines represent rainfall ranges in Maui, Hawaii and they are laid over a Landsat image. The range is drastic in some areas and this jpg really demonstrates the affects of rainfall amounts on land cover and use. It is an amazing illustration of how climate impacts the surface of the earth. The isolines just seem to highlight the areas of changing vegetation and color.

Cool map!


Link to website source:
http://www.esri.com/news/arcwatch/0207/feature.html


PROPORTIONAL CIRCLE MAP


This map is an example of a proportional circle map showing population by mother tongue for provinces and territories in Canada. The source is Statistics Canada dated 2006 and the green circles represent a specific number. The size of the circle is relative to the size of the population where a smaller circle symbolizes lower population and a larger one, greater population. This website has a learning resource called E-STAT which is an interactive tool about society and the economy in Canada. Access is free but only available to educational institutions. The map I found is just an example of the mapping tools they offer for analyzing trends across geographic regions.


Link to website source:

http://www.statcan.ca/english/Estat/guide/census.htm


Friday, June 27, 2008

CHOROPLETH MAP



A choropleth map is defined as a thematic map in which areas are shaded or patterned in proportion to the measurement of the statistical variable being displayed on the map. This one shows alcohol related fatalities by county in Massachusetts for 2006. The legend reflects a range of the number of fatalities in each county. I think this is a great map for communicating these statistics and the website actually has lots more information including maps for all states.

Link to website source:
http://www-nrd.nhtsa.dot.gov/departments/nrd-30/ncsa/STSI/25_MA/2006/25_MA_2006.htm

Thursday, June 26, 2008

DOT DISTRIBUTION MAP

This map of British Columbia is a dot distribution of the population figures from their 2001 census. I think a little more detail might be helpful to determine the actual location of the more heavily populated regions. The zoomed in areas of Victoria and Vancouver offer a better view but the large map could at least have some cities or something for reference. On this map each dot represents 25 people and they are randomly distributed.

Link to website source:
http://www.bcstats.gov.bc.ca/DATA/POP/georef/thematic.asp

Wednesday, June 25, 2008

PROPAGANDA MAP

Propaganda maps seem very popular during times of war to influence the opinions or behaviors of large numbers of people. This is a propaganda map dating from just before World War II, created by the Nazi-German side. It shows Czechoslovak bomber planes covering all of Germany. The article indicates that they were trying to convince the German public that the Czechoslovak side was responsible for the ‘threat’.

Note: I posted this map in June before the slides for week 11 were available. I later realized it was in them so I have added a different propaganda map at the end.

Link to website source:
http://strangemaps.wordpress.com/2006/12/11/49-czechoslovakia-threatens-germany-1934/