Assignment 2: MAPS

Chloropleth Map of Radon Zones in Louisiana

Ø  Red: Zone 1 counties have a predicted average indoor radon screening level greater than 4 pCi/L (picocuries per liter) (red zones) HIGHEST POTENTIAL Ø  Orange: Zone 2 counties have a predicted average indoor radon screening level between 2 and 4 pCi/L (orange zones) MODERATE POTENTIAL Ø  Yellow: Zone 3 counties have a predicted average indoor radon screening level less than 2 pCi/L (yellow zones) LOW POTENTITAL

The purpose of this map is to assist National, State, and local organizations to target their resources and to implement radon-resistant building codes. Homes with elevated levels of radon have been found in all three zones. All homes should be tested regardless of geographic location.

Dot density map: HIV in Thailand

 

Ø Dot density map of young men who tested positive for HIV at time of entry into the Royal Thai Army, Thailand, November 1991–May 2000. Each dot represents one man. Location of dots based on recruit’s residence during the previous 2 years. Data on recruits entering in November 1993 and May 1994 are not available.

A dot density map is a type of map that uses a dot symbol that may serve to geographically present a problem area and provide information regarding clusters of areas of high prevalence rates of a particular feature or phenomenon.

Proportional Symbol Map: France

 ØMean annual water stress duration, calculated for 12 weather stations in France (data Météo-France), as the number of days of water deficit averaged over the 1983–1993 period. Size of the symbols is proportional to drought duration, represented by 15 days categories, the smallest symbol representing 1 month and the largest one over 2.5 months.    

Proportional-symbol maps are used to illustrate geographic data. The symbols are scaled proportionally to their value and placed next to their corresponding geography.

Topographic Map of California’s Earthquakes

ØThis map shows the relative intensity of ground shaking and damage in California from anticipated future earthquakes. Although the greatest hazard is in the areas of highest intensity as shown on the map, no region within the state is immune from potential for earthquake damage.  Expected damages in California in the next 10 years exceed $30 billion.

A Topographic map is a map showing the relief features of the earth's surface, by means of contour lines to show changes in elevation; also called topo map. The purpose of a topographic map is to examine the characteristics of a small area of the Earth's surface in detail.

Environmental Sensitivity Index (ESI) Map: Vieques Island, Puerto Rico

ESI products serve as quick references for oil and chemical spill responders and coastal zone managers.  The ARD watershed projects use this information as a baseline reference for potential physical and biological resources in and around the aquatic environment.  This information can be used to evaluate restoration opportunities for habitat and for terrestrial and aquatic species.

ESI maps include three kinds of information:

Biological Resources: Oil-sensitive animals, as well as habitats that either (a) are used by oil-sensitive animals, or (b) are themselves sensitive to spilled oil (e.g., coral reefs).

Shoreline Rankings: Shorelines are ranked according to their sensitivity, the natural persistence of oil, and the expected ease of cleanup.

Human-Use Resources: Resources and places important to humans and sensitive to oiling, such as public beaches and parks, marine sanctuaries, water intakes, and archaeological sites.