Lab #9Lab #9What Do You Measure in a What Do You Measure in a

Topographic Field?Topographic Field?

Topographic MapsTopographic Maps► Topographic maps published Topographic maps published

by the US Geological Survey by the US Geological Survey depict rectangular sections of depict rectangular sections of the Earth's surface called the Earth's surface called quadrangles; quadrangles; an area an area bounded by lines of latitude at bounded by lines of latitude at the top (north) and bottom the top (north) and bottom (south) and by lines of (south) and by lines of longitude on the left (west) longitude on the left (west) and right (east), measured in and right (east), measured in degrees, minutes and degrees, minutes and seconds. seconds.

Map ScalesMap ScalesThis means for every 1” on map …….it equals 24,000 inches on the ground.

That’s 2000 feet or .38 miles!

Iroquois CampusIroquois Campus

ZoomZoom

ProceduresProcedures

► In this investigation you will construct a In this investigation you will construct a simple contour model by cutting out and simple contour model by cutting out and pasting together paper contour levels. pasting together paper contour levels.

►Each thickness of paper will represent a Each thickness of paper will represent a contour interval of 20 feet.contour interval of 20 feet.

►The result is a model of a typical The result is a model of a typical topographic map……of an imaginary island topographic map……of an imaginary island (located in the middle of the Pacific)(located in the middle of the Pacific)

It should look like this…….It should look like this…….

Let’s get started!Let’s get started!1.1. Write the degree of Write the degree of

latitude and the degree of latitude and the degree of longitude for each of the longitude for each of the four corners of the map in four corners of the map in Figure 1. Figure 1.

• The southern parallel is The southern parallel is 55oo00’ N, and the northern 00’ N, and the northern parallel is 5parallel is 5oo05’ N. 05’ N.

• The eastern meridian is The eastern meridian is 140140oo05’ W, and the western 05’ W, and the western meridian is 140meridian is 140oo10’W. 10’W.

• Complete the coordinates Complete the coordinates at all four corners.at all four corners.

5o 00’ N5o 00’ N

5o 05’ N 5o 05’ N

140o

05’

W

140o

10’ W

140o

05’ W

140

o 1

0’ W

Fill in the other lines in between

2. Construct a graphic (bar) scale on the line 2. Construct a graphic (bar) scale on the line labeled labeled scale of milesscale of miles on Figure 1 – on Figure 1 – 1” = 1 mile1” = 1 mile

3. Next to contour interval write 20 feet

4. To show the relief, color each of the contour levels and cut 4. To show the relief, color each of the contour levels and cut on the solid lines…..Paste each higher contour into the on the solid lines…..Paste each higher contour into the

dashed space on the layer below it.dashed space on the layer below it.

► Figure 2 – Figure 2 – write the colors inside the dashed lineswrite the colors inside the dashed lines Layer 1Layer 1 BrownBrown Layer 2Layer 2 GreenGreen Layer 3Layer 3 PurplePurple Layer 4Layer 4 OrangeOrange Layer 5 & 6 Layer 5 & 6 YellowYellow Layer 7 & 8 Layer 7 & 8 Red Red

Hint: Color first, between dash and solid line – then Hint: Color first, between dash and solid line – then CUTCUT

Paste the set of layers inside the Paste the set of layers inside the dashed line on Figure 1.dashed line on Figure 1.

I t ’s in the OCEAN so color the ocean BLUE

6. The drainage consists of a stream and one tributary… The 6. The drainage consists of a stream and one tributary… The V’s point the way…..Use a blue pencil to draw the streams in V’s point the way…..Use a blue pencil to draw the streams in

the valley’s.the valley’s.

For Example

7. Use the following symbols to 7. Use the following symbols to represent features on a topo map! represent features on a topo map!

SwampSwamp

Benchmark – 1Benchmark – 1School - 2 School - 2 Mine - 3Mine - 3

Roads & RailsRoads & Rails

Due – MONDAY 10/22!Due – MONDAY 10/22!

►Make sure you’ve answered ALL Make sure you’ve answered ALL questions on the lab. questions on the lab.

►We will NOT be answering ANY of the We will NOT be answering ANY of the questions for you……if you don’t know questions for you……if you don’t know what to do……find the answer by what to do……find the answer by researching on your own!researching on your own!

And FINALLY……..And FINALLY……..

► Clean up!Clean up!► Recycle scraps in the Recycle scraps in the

blue binblue bin► Return all borrowed Return all borrowed

materials (pencils, materials (pencils, glue, scissors) to the glue, scissors) to the proper location!proper location!