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Slide 1

Mapping

Mapping

Slide 2

What is a map?

What is a map?

It is a representation of something (Earth, stars, solar system, a building, etc

Slide 3

Uses of Maps

Uses of Maps

To determine where you are going.

To act as a model of Earths surface.

Used to locate various places

To show the distribution of various features or types of materials.

Slide 4

Quick Review of Latitude and Longitude

Quick Review of Latitude and Longitude

Latitude

Measured in degrees North and South of the Equator.

Lines drawn parallel to each other running west to east.

Slide 5

Quick Review of Latitude and Longitude

Quick Review of Latitude and Longitude

Longitude

Measured in degrees East or West of the prime meridian.

Lines drawn running North and South.

Slide 6

Topography

Topography

The lay of the land.

Shows relief using contour lines.

Relief- highs and lows of Earths surface.

Relief can be calculated

Take the difference between the highest point and the lowest.

Ex: Mountain peak 20 m. lake 10m

20m- 10m= 10m

The relief of this area is 10m

Slide 7

Reading a topographic map- Contour Lines

Reading a topographic map- Contour Lines

Lines on topographic maps.

Connect points of equal elevation.

Everything connected to that line has the same elevation.

Elevation- the distance something is above sea level. Sea level= 0m or 0ft.

Slide 8

Reading a topographic map- Contour Intervals

Reading a topographic map- Contour Intervals

Contour interval- gives the difference in elevation between 2 contour lines.

Another indicator of height.

Shown on maps as C.I.= 10ft.

Used to count contour lines.

C.I.= 1000ft

How it will look on a map

Slide 9

Reading a topographic map- Index Contours

Reading a topographic map- Index Contours

A index contour is a contour line that is accentuated in thickness and is labeled with the appropriate measure of elevation.

Index contours occur every fifth contour line.

Help the map user read elevations on a map.

Red arrows indicate location of index contours.

Slide 10

Reading a topographic map- Streams

Reading a topographic map- Streams

The direction a streams is flowing is shown on a topographic map by the way a contour line crosses the stream.

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