thematic maps l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Thematic Maps PowerPoint Presentation
Download Presentation
Thematic Maps

Loading in 2 Seconds...

play fullscreen
1 / 19

Thematic Maps - PowerPoint PPT Presentation


  • 578 Views
  • Uploaded on

Thematic Maps Sandra Yeboa & Willis Holden What are Thematic Maps & What Do they Do? Maps that… Accent a particular geographic attribute or relationships between several attributes Transform geographic data into geographic information Reveal spatial patterns Thematic vs. Reference Maps

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Thematic Maps' - Mia_John


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
thematic maps

Thematic Maps

Sandra Yeboa & Willis Holden

what are thematic maps what do they do
What are Thematic Maps & What Do they Do?

Maps that…

  • Accent a particular geographic attribute or relationships between several attributes
  • Transform geographic data into geographic information
  • Reveal spatial patterns
thematic vs reference maps
Thematic vs. Reference Maps
  • Highlights geographic distribution of a particular attribute (ex. Population change)
  • Highlight many features and geographic attributes
thematic maps4
Thematic Maps
  • Characterized by the use of abstract, graphic symbols that represent quantities and qualities that make locations meaningful
  • Symbols are varied in color, size, and shape to further accentuate spatial patterns
  • Examples of varied geographic data attributes: counts, density, rates etc.
counts rates densities
Counts, Rates, & Densities
  • Counts: numbers representing people grouped according to population and housing

(ex. U.S. census data are reported as grouped counts in geographically similar areas)

  • Rates: process of dividing one count by another

(ex. Women as a percentage of population)

  • Densities: count divided by geographic area of grouped counts
  • (ex. Person per square kilometer)
thematic mapping mapping counts
Thematic Mapping:Mapping counts
  • Simplest way is mapping a symbol for every individual
  • Cons: complicates things when population is large
thematic mapping proportional symbols map
Thematic Mapping:Proportional Symbols Map
  • Also referred to as “graduated symbol maps”
  • Shows more detail as symbols shows proportional size to counts it represents
  • Represents larger groups, not individuals
thematic mapping rates densities
Thematic Mapping:Rates & Densities
  • Rates can be mapped to show proportional relationship of 2 counts

(use of pie charts, bar charts etc.)

  • Densities are mapped to show relationship of data to geographic area (i.e. – no symbols)

(use of choropleth, or “graduated color”, mapping)

obtaining thematic maps
Obtaining Thematic Maps
  • For this project you will need 3 thematic maps.
  • You must have at least one from American Community Survey and one Decennial Survey Map
obtaining a decennial map
Obtaining a Decennial Map
  • Go to http://factfinder.census.gov
  • On the main page in the center column under “Getting detailed data” go to Decennial Census, and click “get data”.
obtaining thematic maps11
Obtaining Thematic Maps
  • Click on the 1990 Census Tab
  • Make sure that 1990 Summary Tape File 1 (STF 1) - 100-Percent data is the dot selected. To the right of this click on Thematic Maps
obtaining thematic maps12
Obtaining Thematic Maps
  • The list tab will be selected, and go to select a geographic type and select county. Then select your state from the box below type. Then select the county of your choice. Highlight your county and click “Next”.
obtaining thematic maps13
Obtaining Thematic Maps
  • On this screen you can select any feature that you want to have a map created.
  • Copy this map into FrontPage
obtaining an american community survey map
Obtaining an American Community Survey Map
  • Use the fact finder website.
  • Go to “Fast Access to Information” type in your name of the county and the state it is located.
obtaining an american community survey map15
Obtaining an American Community Survey Map
  • Click on the “2000” tab.
  • Here you can choose any of the statistics that have map next to it.
  • Choose your statistic and click “map”.
  • Copy this map into FrontPage.
summary
Summary
  • Thematic maps accent a particular geographic attribute or relationships between several attributes
  • Symbols on maps are varied in color, size, and shape to further accentuate spatial patterns.
summary17
Summary
  • For this Project you need at least one of each map. (ACS or Decennial)
  • For an example of what the project looks like go to
  • http://www.geog.psu.edu/courses/geog121/projects/proj5_example.html
e mail
E-mail
  • asy120@psu.edu
  • wrh128@psu.edu
works cited
Works Cited
  • DiBiase, David (2002) Understanding Geographic Data. Module 6: Census Data. ESRI Virtual Campus http://campus.esri.com Accessed 30 November 2006.
  • United States Bureau of the Census (2002) American FactFinder. http://factfinder.census.gov Accessed 30 November 2006.