Hurricane Isaac

Here's a video with a view of Hurricane Isaac from space.

 

And here is Isaac down in Florida on the 27 of August, 2012.

Environmental Sensitivity Index Map

An environmental sensitivity index map uses symbols to represent environmental hazardsor concerns. For example, a symbol of a seal would indicate that an area would contain an endangered species. The image below is an example of an environmental sensitivity index map.


Source: http://www.mytropicalescape.com/2007/06/27/where-the-heck-is-culebra/

Proportional Symbol Map and Isopleth Map

A proportional symbol map is used to describes proportions in relation to a set of data.The larger the dot or symbol, the higher the proportion. For instance, the map below shows the porportion of Walmart stores in each state. Source: http://personal.frostburg.edu/sbriggs0/maps.htm

An isoleth map uses shaded linesto define regions of data. For example, an area between shaded lines would indicate how much rain had fallen in the area in the past year. The image above demonstrates average temperatures in different regions. However, the above image is easily confused with a choropleth map, due to the coloring of the regions.

Source : http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/regional_monitoring/clravt.gif

Dot Density Map

A dot density map uses dots asa place marker to label different sets of data.For instance, the map above shows the population of the United States. Areas with a higherconcentration of dots represents a higher population.
Source: http://ahtanu.tripod.com/images/dot-density.gif

Choropleth Map

A choropleth map is a map that is color-coded by zones, used to distinguish different pieces of data. A popular example is an election map, which often color-code states based on the voting population. A goof choropleth map contains a legend and scale bar, and many require having the North arrow somewhere on the map to establish direction.  For instance, this map compares how many males reside in each state compared to 100 females.
Source: http://my.ilstu.edu/~jrcarter/Geo204/Choro/