Part A
Mercator Map
a rectangular map used as a navigation tool in which the lines for longitude and latitude are straight and parallel. Distortions increases as you move further from the equator.
Distortion
the loss of accuracy in size, shape, position or distance when transferring a curved surface to a flat surface such as a map.
Projection/Projection Types
a representation of a curved 3- dimensional surface onto a flat 2- dimensional map. There are 3 major types of projections: cylindrical, conic, and planar.
Map Scale
ratio of a distance on the map to the corresponding distance on the ground
Parts of a Map (TODALS)
an acronym to used to remember the different parts of a map. Title, Orientation (compass), Date, Author, Legend (what symbols on the map mean) Scale ratio of distance used on the map.
Cartogram Map
a map in which the shape or size is distorted in order to demonstrate a variable such as travel, population or economic production.
Choropleth Map
shaded or patterned map used to visualize how a measurement varies across a geographic area.
Thematic Map
shows information relating to a specific theme, such as the spread of a religion, trade routes, or the industrial growth of a nation.
Political Map
shows the major boundaries between countries or states.
Physical Map
shows the major physical features of an area, such as its rivers, mountains, vegetation and elevation.
Map
a two-dimensional graphic representation of selected parts of the earth’s surface.
Geography
the study of the Earth's surface and its various climates, countries, peoples, and natural resources.
Grid System
allows the location of a point on a map to be described in a way that is universally understood. It typically includes coordinates and is often rectangular or square shaped.
Latitude
the distance in degrees on the earth’s surface north or south of the equator. The equator is 0 degrees.
Longitude
the distance in degrees on the earth’s surface east and west of the prime meridian.