Chapter 1-3 Mc Flashcards
(140 cards)
Map is
A two dimensional or flat scale model of the earths surface or a portrait of it
Cartography is the
Science of mapmaking
Map are used as both a —– tool and a ——— tool
Reference tool and communications tool
Map scale is
The level of detail and the amount of area covered on a map
Ratio or fraction shows
The numerical ratio between distances on the map and the earth surface
Written scale is
The relationship between map and earth distances in words
Graphic scale
Usually shows a bar line marked to show distance on earths surface
Projection is
Scientific method of transferring locations on earths surface to a flat map
Robinson projection
Useful for displaying info across ocean, disadvantage land areas are smaller, 4 types of distortion ( globe turned flat )
Mercator porjection
Shape is distorted very little, direction is consistent, map is rectangular, distorted at poles (good for sailors)
What are the four types of distortion
Shape
Distance
Relative size
Direction
A meridian is
a circle of constant longitude passing through a given place on the earth’s surface and the terrestrial poles. ( arc drawn b/w north and south poles; going up)
Longitude is
A numbering system that the location of each meridian is identified on the earth surface (angular distance of a place east or west) expressed in degrees or minutes
Prime meridian is
The meridian that passes through the royal observatory at Greenwich England ( 0 degree longitude )
A parallel is
a circle drawn around the globe parallel to the equator and at right angles to meridian
Latitude is
The numbering system to indicate a location of a parallel
One hour of time is equivalent to
Fifteen degrees longitude
Greenwich mean time or universal time is
The time at the prime meridian 0 longitude and is the reference time for all points on earth
International date line is
It follows180 degrees longitude
move clock backwards 24 hour if your are heading
Eastward toward America
If you are heading westward toward Asia you move the clock
24 hours ahead
Global Positioning System gps
A sytem that accurately determines the precise position of something on the earth
Geographic information system gis
Computer system that captures and stores data, quarries, analyzes and displays geographic data
What is place
A specified point on earth distinguished by a particular characteristic