Thursday, May 22, 2008

Dot Distribution Map

http://www.ncaction.org.uk/search/entry.htm?id=1447

Dot distribution maps are a type of thematic map. The theme of this GIS dot map is the population in Brazil. For this map each dot represents 100,000 people. This type of map is an efficient way to demonstrate the location of population concentrations.

Propaganda map

http://www.libertythink.com/2005/08/globalization-uber-alles-ftaa-decline.html

A propaganda map contains Information that is spread for the purpose of promoting some cause. The map above was constructed to demonstrate the reason for the “decline of America;” the FTAA is the Free Trade Area of the Americas.

Tuesday, May 20, 2008

Hypsometric map

http://iodeweb5.vliz.be/oceanteacher/resources/other/GISModules/Module_h/module_h2.html

Hypsometric maps are a form of topographic map. Similar to topographic maps, hypsometric maps show changes in elevation; however, the difference being that hypsometric uses color to denote changes, whereas, topographic maps use lines.

Topographic Map

http://www.geo.mtu.edu/volcanoes/fuego/topoair2.html
Above is a topographic map of twin volcanoes named Fuego and Acatenango; which are located in Guatemala. On this map, each contour line represents a change in elevation of 200 feet. Contour lines that are close together denote sharp changes in elevation; conversely, the greater the distance between topographic lines, the more gradual is the slope.

Monday, May 19, 2008

PLSS MAP

http://nationalatlas.gov/mld/plss00p.html

PLSS refers to the Public land Survey System. This is a grid-like system used in most of the United States to survey and record land ownership. The PLSS usually contains or is formatted from Township, Range & Section Boundaries. Above is a sample map from the US Geological Survey (USGS) demonstrating a PLSS map.

Cadastral Map

http://www.satimagingcorp.com/svc/cadastre_and_land_records.html

Cadastral maps show land ownership; these maps are usually used for the purpose of taxation. Cadastral derives from the word cadastre, which is a register, with details of the area, the owners and the value of the real property of a country. This map is a satellite image of an area in Little Rock, Arkansas used for tax mapping.

Friday, May 16, 2008

Planimetric Map

erg.usgs.gov/nimamaps/topo.html

The purpose of a planimetric map, such as this map of Iraq is to demonstrate the actual horizontal relationships between features. These maps should have a scale to measure the distance between features. Vertical information of features shown on planimetric maps is intentionally not shown.

Mental Map

www.uky.edu/~ulack/Geo152/Syllabus152Fall05.htm

A mental map is based on an individual's personal experience of how he or she remembers a particular geographic area. The cartographic representation above depicts an individual’s interpretation of his home town in the 1940’s.

Wednesday, May 14, 2008

Thematic Map

Thematic maps are maps that relate a single theme or purpose. An example would be a map that demonstrates voting demographics by political party (red state, blue state). This particular thematic map represents the fertility rates (Children per woman) throughout the world. The darker colors are higher fertility; all countries are represented on a color scale from darkest to lightest. This is also an example of a choropleth map.

http://blog.thematicmapping.org/2008/03/first-thematic-map-examples.html

Tuesday, May 13, 2008

Choropleth Map


Choropleth Map
This map is an example of a choropleth and thematic map from Google Earth; it is made up from digital lights. The author has titled this image as "Flickr Geotagging Statistics." Flickr is a trade name and the map is supposed to flicker to show the location of geotagged images from around the North American Continent. Choropleth maps are thematic type maps that demonstrate some type of statistical data; such as population and area.


www.dailyack.com/2006_09_01_archive.html