cartography study of mapmaking

Cartography•Study of Mapmaking

Continents

1. 2. 3. 4. 5. 6. 7.

Topography

• The shape of the Earth’s surface• Raised area are hills or mountains• Depressed areas are valleys or craters

Elevation

• Height above sea level, measured in feet or meters.

Relief• The difference in a region’s elevations.• Which landscape below has a greater relief?

Map•Drawing showing earth’s surface on a plane (flat surface)

Map Projection•Way of showing a curved earth on a flat surface

Globe: A spherical model of earth•most accurate map is a globe

•Flat maps distort features because they are not 3-D

Landscape:

•Physical features of

Earth’s surface

Longitude•Measures East and West of the Prime Meridian

Meridians

•Lines on a map running from N to S

•Used to measure Longitude

•Numbered 0° to 180° both east and west

•Not parallel to each other

Prime Meridian

•Meridian that runs through Greenwich, England

•This is 0°

•What other countries does the Prime Meridian pass through?

Latitude•Measure of distance N or S of the equator

Parallels•All lines on a map running from E to W

•Used to measure latitude

•Cross Meridians at right angles

•Parallel to each other (concentric circles)

Equator

•Imaginary line around the Earth that divides it into two hemispheres

•The equator is 0°

•Each degree (1°) of latitude and longitude is equal to 60 minutes (60’)

•Each minute (1’) is equal to 60 seconds (60’’)

Understanding Coordinates…

(Atlas activity)(Google Earth)

Topographic Map•Map that shows the different shapes and sizes of a land surface using contour lines.

Map view of hill

Side view of hill

Contour Line•Line that passes through all points on a map that

have the same elevation

Contour Line Basics•Closer lines indicate steeper terrain

•Every Point on a contour line has the exact same elevation

•Lines separate points of higher elevation from lower elevation

•Never cross each other

•Contour lines are hashed to show a depression or crater

•An irregular bullseye formed by contour lines represents a hill

•Lines form a ‘V’ pattern when crossing streams•The ‘V’ always points upstream

Scale•Ratio of distance on a map to the distance on earth

•Shows how a map compares in size to earth

•Stated Verbally or graphically

•Example – 1:24,000

BenchmarkLocation of known elevation•Is a marker set into the ground•Shown as BM on a map

Topographic Profile•Shows land features from the side rather than from an overhead view•Made from a topographic map

Time Zones•Longitudinal belt of Earth in which all areas have the same

local time

•Earth is divided into 24 time zones

•Each 15 degrees wide

•How many time zones are in the continental US?

International Date Line

(IDL)•180 degree meridian

•Not straight

International Date Line

•When the line is crossed going west, one day is added

•When the line is crossed going east, one day is subtracted

•This line is NOT straight so that countries are not divided and have different dates