Mapping

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20*W 20*E 40*E40*W60*W80*W 60*E

20*N

40*N

60*N

20* S

40* S

Mapping Basics

• Map: a model on a flat surface– Early Explorers made maps by hand=cartographer– Today, pictures from satellites

Items Found on a Map

• Numbers for location= Latitude Longitude

• Scale

• Compass Rose

• Key/Legend

Types of Maps1. Road Maps2. Political Maps- shows city, state, country

boundaries3. Topographic Maps-used by

Geologists/Outdoorsman

Topographic Maps

• Topography Map: Provides info. On elevation, relief, and slope of the surface– Puts a 3D landform such as Mtn. onto 2D flat

surface=map

Terms Used on Topographic Maps

• Contour Line: Connects points of equal elevation ex. Hill/Mtn.

4000 ft3000 ft

2000 ft

• Dashed Contour Lineex. Valley/Depression

3000 ft.

2000 ft.

• Ex. Connect the dots of the same elevation

3000 ft

3000 ft

2500 ft

3000 ft

3000 ft3000 ft

2500 ft

2500 ft

2500 ft2100 ft

LV

• Ex. Connect the dots of the same elevation

3000 ft

3000 ft

2500 ft

3000 ft

3000 ft3000 ft

2500 ft

2500 ft

2500 ft2100 ft

LV

Contour Interval

• Contour Interval: numerical difference between contour lines

80 ft60 ft40 ft20 ft

C.I=

C.I.

• Contour Interval Rules1. The closer the lines=steeper it is2. The further apart the lines=flatter area3. The contour interval must stay the same on each

map