Name ________________________________________ Period _____

1. Start Arcview and open an existing project called County1. Open View1. This view contains six themes or data layers as seen in the table of contents. These are Streams, Lakes, Townships, Roads, Cities, and County Boundaries.
2. Click the checkboxes in front of Townships, Roads, and Cities to turn off the display of these themes. Now all you can see are the Streams, Lakes, and County Boundaries.
3. Click on the word "Streams" to make this theme active. On the button bar, click the fifth button from the left; the "Open Theme Table" button. The "Attributes of Streams' table will appear. Click the 6^th button (binoculars) to open the Find box. Type in one of the following stream names:

Bailey Creek Gum Creek Otter Creek

Brumbach Creek Little Vermilion River Pecumsaugan Creek

Buck Creek Long Creek Person Creek

Clark Run Milliken Creek South Kickapoo Creek

Covel creek Mission Creek Spring Brook

Crookedleg Creek Moores Creek Tomahawk Creek

Fall River Creek North Kickapoo Creek Walbridge Creek

Goose Creek O Neill Branch

Now click "Okay". That stream will be highlighted in the table and on the Streams theme.

Close the "Attributes of Streams" table.

4. Click the 5^th smaller tool button to Zoom In to your stream. Make the rectangle big enough to include all of the stream's tributaries and small pieces of all the surrounding streams. If you do not like the zoom, click the 9^th menu button to "Zoom to Full Extent" then zoom in again until you are satisfied.
5. The drainage, or watershed, of your stream includes the beginnings of all its tributaries. Click the last tool button "Draw", then drag down to the 6th draw button, the polygon. Put the crosshair on the mouth of your steam and click once to begin the polygon. Then move the crosshair to a point you feel is halfway between your stream or tributary and the next nearest stream. Click once at that point and move to what you feel is the next point. Each time you click, you are adding a vertex to your polygon. The more you click, the better it will be. Continue clicking around your stream's tributaries until you have gone all the way around back to your stream's mouth. Click twice here to complete the polygon.
6. Handles (black boxes) will appear when the polygon is complete. Copy the following information from the lower left side of the screen:

Segment length: _____ mi. Perimeter: _____ mi. Area: _______ sq. mi.

The first number is just the length of the polygon's last segment. The perimeter is the distance around your stream's drainage and the area is the size of your stream's drainage basin.

 

7. Click the 3^rd tool button "Vertex Edit". A vertex appears on the polygon every place you originally clicked. You can now click on any vertex and drag it in or out to correct any mistakes or to "round" the polygon. As you correct the polygon, the numbers at the lower left keep changing. When you finish, copy down the final numbers.

Segment length: _____ mi. Perimeter: _____ mi. Area: _______ sq. mi.

8. Click on the 2^nd tool button to make the cursor a pointer again, then click anywhere on the picture to remove the handles.
9. Click the 9^th menu button to "Zoom to Full Extent". Now you can see how much of the county is drained by your stream. Click the checkbox next to "Cities" to turn that theme back on. Is any city as large as your drainage basin?

_____ Yes _____ No

10. Click File on the menu line and print this view. Write your name on it and hand it in along with this sheet.