Wednesday, April 6, 2011

Continuously variable proportional circle map

Continuously variable proportional circle map depict information about different areas. The circles show the magnitude of the information that is being displayed. The bigger the circle the greater the magnitude. link

DEM map

DEM stands for digital elevation model. DEM maps digitally represent elevation changes in an area. This is a DEM map of part of the Ivory Coast. This map is also a hypsometric map because it displays the different elevations in different colors.  link

DLG Map

DLG stands for digital line graph. DLG maps typically use information gathered by the USGS. DLG maps are digital vector representations of map information. Aerial photos are typically taken and then the information from them and topographic maps are digitized. This map is a topographic DLG of a part of Massachusetts.  link

DRG Map

DRG stands for Digital Raster Graphics. A DRG map is a scanned version of a USGS map. It is basically a digital topographic map. This DRG map is of a part of Bushkill, PA. link

Isopleth Map

Topographic, Isobar, Isotaches etc are all examples of isopleth maps. An isopleth is any contour line that connects things of an equal value. This map shows the different temperatures in Mexico. It is also a thematic map because it is shaded in different colors and focuses on temperature.  link

Isopach Map

An isopach map is also like a topographic map but its contour lines are of the thickness of a rock different places. This map is also a hypsometric map because it shades the different thicknesses of rock in different colors. link

Isohyet Map

Following the same pattern as the last two posts this map shows connecting lines that are of the same rainfall in given period of time. This is a map that shows isohyets for the United States on June 13th and 14th, 2010. This map is also a planimetric map in regards to how it shows how the states are divided up. link