- show topography or using

elevationcontour lines

Topic: Topographic Maps

1. Contour line : connects pts of = elevation.

2. Contour interval : difference in elevation b/w 2 adjacent contour lines.

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Parts: of a Topographic Map

Contour Interval Example

• http://www.learnearthscience.com/pages/For_Teachers/Unit%20Notes/measuringearth/measuringearth.pdf

3. Index contour lines : darker, marked w/ elevation.

http://www.k4lrg.org/Field_Day/2005/Topo_Map_K4LRG-FD_Site.png

4. Spot elevation (x): indicates highest point

5. Benchmark (BM): point of known elevation

Hachures indicate depression, hole, basin

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RAP 9/11 pg. 14When you are done—study for your quiz!

**Put your homework on your desk**1

What is the contour interval of the map above?

What is the elevation of the contour line? **Hint- This is an island**

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Write the definition of a contour interval.

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Topographic Features

• Hill

• Valley

• River

• Depression

• Volcano

Contour lines V upstream. In other words, the *stream flows into the point, out of arms.

Identify a hilltop (H), stream (S) and valley (V) on this

topographic map.

http://www.k4lrg.org/Field_Day/2005/Topo_Map_K4LRG-FD_Site.png

Challenge: Draw an arrow in the direction the river is flowing!

More About Topo Maps

Topographic Profiles

• Matching

RAP 9/12

1. What direction does the

stream flow in?2. What is the

contour interval?3. What is a

depression or basin (what would it look like)?

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Green River Topographic Map Activity

Select the most accurate profile that runs from A to A` from the choices.

Practice!

• http://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=493

Remote Sensing

•process of collecting data from far above Earth’s surface (using satellites, airplanes or ships)

Aerial Photographypictures taken from the air

Used for espionage, movie production, etc.

Satellite Imagerypictures taken from artificial satellites in space

Used for warfare, forestry, intelligence, etc.

Satellite or Aerial?

Landsat images courtesy of NASA at http://www.nasa.gov/vision/earth/lookingatearth/Landsat_Tsunami.html

Before the tsunami: 13 December 2004

After the tsunami: 29 December 2004

Landsat images of a region of the Aceh Peninsula on the Indonesian island of

Sumatra

GPS Navigation

Triangulation

Receiver must be receiving signals from at least three

satellites.

The above images are courtesy of Kathryn Keranen, GIS/GPS

Remote Sensing Consultant

GPS tracking and data transmission via GPRS or CDMA 2000

at http://www.cybergraphy.com/Engl ish/gtrack.htm

Exit Pass: Put your name on a scrap piece of paper. Write down numbers 1-

5 on piece of scrap paper.

• http://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=471