A planimetric map is a surface map with no relief features.
It shows only the horizontal position of features, without regards to
elevation. This map of downtown Chicago is considered a planimetric map because
it shows the roads of the city in relation to one another. It is not possible
to distinguish the elevation of the area from this map.
Tuesday, November 27, 2012
Topographic Map
Topographic maps are considered to be a large-scale maps
showing relief. These types of map use contour lines to portray the shape and
elevation of land. They also capture 3-dimensional aspect of terrain on
two-dimensional surface. Contours are imaginary lines that join points of equal
elevation on the surface of the land above or below a reference surface as mean
sea level. This particular map can be considered a topographic map because it
shows the different elevations with shaded relief. Due to this maps large scale
and quantitative representation of relief is it able to qualify as a
topographic map.
Mental Map
A mental map
is a map in an individual’s mind, which reflects the knowledge and prejudices
of that individual. Such a map reflects the individual's perceptions of, and
preferences for, different places and is the result of the way in which an
individual acquires, classifies, stores, retrieves, and decodes information
about locations. Mental maps may also include images of locations, thus,
different locations may be ranked in order of attractiveness. This map is an
example of a mental map because is captures the person’s point of view, it
obviously is not geographically accurate but is shows how this particular
individual perceives their surroundings.
Thematic Maps
A thematic map
shows information on a topic superimposed over a base map. These types of maps
or charts are designed to show a particular theme connected with a specific
geographic area. They can portray physical, social, political, cultural,
economic, sociological, agricultural, or any other aspect of a city, state,
region, nation, or continent. The map displayed above is considered a thematic
map because it shows the estimated median household income (the theme/topic) of
the United States. The different variations of the median household incomes are
shown using different shades of red.
Cadastral Maps
A cadastral
map is a legal map for recording ownership of property. The map describes
boundaries and ownership. Cadastral mapping is done from hard copies of the
administrative maps, which specifies the details of each plot, roads, railway
lines, water bodies, vegetation, etc. Cadastral mapping leads to effective
management of public land records. This map is an example of a cadastral map
because it shows the precise locations, and dimensions of individual parcels of
land. It also shows all the land parcels in relation to one another and to the
adjoining roads.
PLSS Maps
PLSS stands for
Public Land Survey System. This surveying method was used historically over the
largest fraction of the United States to survey and spatially identify land parcels
before designation of eventual ownership, particularly for rural, wild or
undeveloped land. This map shows the extent of the system in the United States.
This area encompasses major
portions of 30 southern and western states. The PLSS is also many times
referred to as a rectangular survey system.
Subscribe to:
Posts (Atom)