Nominal Area Choropleth

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEidkHo8rdXWlUuZxLrvFYeKInxZfx1De3iWmKH4Oz5GN98rjge23uc4Rn6xvogAUFEtcKsAv8Zc23J2tUlxrbDyjRusOUO4LUuVpP9TKrcKkLOh5Ds2hkkzdnDJ9hOtgAZJE2F3GbeS9ac/s400/2choropleth.jpg
Like all choropleth maps a nominal area cholorpleth map displays data by use of color. however with a nominal area map there is no implicit reason the data is compiled in one manner or the other. This map shows a nominal area chorpleth map related to male population.

DOQQ

http://casoilresource.lawr.ucdavis.edu/drupal/files/images/drg_vs_doq-forrest.preview.png

Digital Orthophoto  Quarter Quads, or DOQQ for short, combines the artistic visuals of a photo and uses geometry to section of quadrant within the map.

DLG

http://www.manmapping.com/seminar/dlg.gif
A DLG or Digital Line Graph is a technological representation of a given area using lines to present specific data point. Much like the other computer based mapping techniques DLG is a somewhat new technique for mapping graphical data.

DRG

http://egsc.usgs.gov/isb/pubs/factsheets/fs08801.graphics/drg.jpg
 A DRG or Digist Raster Graph is a scanned image of a topographical map that has been converted into data. This is a scanned map of Washington DC.

DEM

http://www.sciencegl.com/gis_dem/map_dem_gis_3d_b.jpg A DEM map, or Digital Elevation Model, is a three dimesion techonological rendering of a given area's elevation.

Classed Choropleth Map

http://www.esds.ac.uk/international/images/italyim.gif

The objective of a classed choropleth map is to determine the height, color, and intesnsity of a given area through the use of color and a bar to guide the viewer.

Hypsometric maps

http://www.public.asu.edu/~arrows/pamir/hypso.jpeg
A hysometric map is a map that measures eleveation by utilizing a topogrphical surveying technique and contour lines.