DEM

Digital Elevation Model (DEM) is remote sensing to create data for evaluational maps.










http://members.shaw.ca/cismaps/dem/cded1250map.png

DLG

Digital Line graph (DLG) is used for United States Geological society for elevational maps for data.









http://weather.unisys.com/usgs/3sec/usgs-US.gif

DRG

DRG maps is a scanned image of a topographical map from the USGS that is made into a digital map. This is a DRG map of Chicago.












http://www.forestpal.com/images/drg.gif

Isopleth

Isopleth maps use contour lines to show information on data. These types of maps are good for showing elevation or precipitation,as shown here.












http://www.nature.nps.gov/air/edu/lessons/images/precip1996.gif

Isopach

Isopachs are contour lines of equal thickness over an area.











http://www.agu.org/pubs/eos-news/supplements/1995-2003/images/96323f2.gif

Isoheyts

Isoheyts is a method that shows the rainfall on the earth. This is an isoheyt map of California showing its annual precipitation.
















http://www.csulb.edu/~rodrigue/geog442/labs/Califprecipshadedrelief.jpg

Isotachs

Isotachs are lines of equal wind speeds that are mostly contoured in the upper levels of the atmosphere.













http://cimss.ssec.wisc.edu/goes/misc/970813_1200_ir3_winds.GIF