This map is a thematic map, illustrating a very
specific topic. This map illustrates the concentrated solar resource in the
United States. This is done by using different colors and varying shades to
demonstrate the intensity. This colors can be read using the provided legend to
the right. The projection used for this map is Alber’s Equal Area conic projection.
The shape is distorted but the area is true for each state. There are two
standard parallels where no distortion occurs but shape and distance have
minimal distortion in between these parallels.
Sunday, January 26, 2014
Topographic Map
http://geography.about.com/od/understandmaps/a/map-types.htm
This map is a topographic map of Hawaii. It
demonstrates the physical features for the big island of Hawaii. It illustrates
the contours of the island, showing the differences in elevation. When the
lines are closer together, the land is steeper and demonstrates a mountain or a
valley. It also contains a scale to determine the distance between two points
in this map. This is different from other maps because it only has one intended
purpose: to demonstrate the elevation differences on the land. There are no
boundaries beside the land boundaries, no labels besides the elevation labels
and no colors to symbolize different things.
Planimetric Map
http://www.texasfreeway.com/houston/historic/road_maps/houston_road_maps.shtml
This is an example of a planimetric map. This is a road map of the Gulf Freeway in Houston
Texas. It takes a three dimensional map and draws it on a two dimensional surface. This map illustrates activity taking place in this area. This shows and
labels the roads in the city of Houston and allows drivers to navigate through
the city that maybe they have never visited before. This map probably uses a
coordinates system and uses symbolism to differentiate between land and bodies
of water as well as the roads. The red grid either demonstrates townships or
latitude and longitudinal lines. Usually small scale maps and road maps are
illustrated using the Lambert conformal conic projection.
Saturday, January 18, 2014
Robinson Projection
http://www.lib.utexas.edu/maps/world.html
This map is a Robinson
projection displaying the world and the standard parallels are at 38 degree
north and 38 degree south, making it secant. The map is based on coordinates
and not math, meaning it distorts all major components of a map, distance, area,
shape, and scale, all to try to limit as many of the errors as possible. It
shows the terrain and grading of the world and ocean floors through texturing
and shading. Places like Greenland, and Antarctica ore lighter blue representing
cold, icy terrain. Lighter beige
areas such as the Sahara in Africa represent dryer sandier geography. Green represents
land grassy areas. The change elevation/grading can be seen with lines and shading
that represents mountains, i.e. the Rocky Mountains in North America, and in
the ocean to demonstrate the non-smooth texture.
Mollweide Pseudocylindrical Projections
http://www.colorado.edu/geography/gcraft/notes/mapproj/mapproj.html
This projection is a Mollweide Equal-Area projection of the world.
This map is for definition purposes to help introduce the types of map
projections to those interested. It has simple labels of the meridians and the parallels at 30 degree intervals. IT uses the two shades to depict land and water. It is a cylindrical projection with straight parallels
and arced parallels. It is typically used to show world maps. The meridians are
equally spaced apart. The scale is true along the 40.44 degree north
parallel and 40.44 S parallel which are the standard parallels. This projection shows equal area throughout the map.
Azimuthal Equidistant Maps
http://www.colorado.edu/geography/gcraft/notes/mapproj/mapproj.html
This map displays a polar azimuthal projection. It is
sometimes used for mapping routes for air travel. Measuring the distance from
the center will be true distance. As you move away from the center, the
distance increasingly distorts. All the point on the map is going in the true
direction. The meridian lines are straight and the parallels are varying sized
circles space out equally. This map is best used for displaying polar locations. This map demonstrates the north pole. This map is for definition purposes to help introduce the concept of an Azimuthal map projection.
Behrmann cylindrical equal area
http://www.colorado.edu/geography/gcraft/notes/mapproj/mapproj.html
This map is a cylindrical normal projection with equal
area. This map is for definition
purposes to help introduce the types of map projections to those interested. It
uses 30 degree North as the parallels with no distortion. It has straight
equally spaced meridians and unequally spaced parallels. True scale occurs
along the central line, which in this case is the equator, and along two lines
at equidistant from the equator. As you move farther and farther away from the
central parallel, distortion increases.
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