GIS Tutorial for Health. Wilpen L. Gorr. Читать онлайн. Newlib. NEWLIB.NET

Автор: Wilpen L. Gorr
Издательство: Ingram
Серия: GIS Tutorials
Жанр произведения: Учебная литература
Год издания: 0
isbn: 9781589483941
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in the tutorials and the end-of-chapter assignments in this book.

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       2 Click OK.

      YOUR TURN

      Explore the other options in the Map Document Properties dialog box. Type a brief description and enter your name as the map author. When you are finished, click OK.

      Save the map document

       1 On the Menu bar, click File > Save As.

      2 Save your map document as Tutorial2-1YourName.mxd to your Chapter2 folder in MyExercises. If you get a VBA code warning, click OK. Do not close ArcMap.

      Zooming to and panning health features on a map

      Sometimes you will want to concentrate on a particular area of a map. You will also quickly learn that some geographic features are too small to see when viewing an entire map. If you enlarge a particular area, you can see the details more easily. Zooming and panning enlarges or reduces the display and shifts it to reveal different areas of the map. You will find zoom and pan buttons on the Tools toolbar.

      Zoom in

       1 On the Tools toolbar, click the Zoom In button .

       2 Press and hold the mouse button on a point above and to the left of the state of Illinois.

       3 Using the mouse, drag the pointer to draw a box around the state of Illinois. Then release the mouse button.

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      The resulting map is a zoomed area of the state of Illinois.

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      4 Click the screen to zoom in, centered on the point you clicked. This is an alternative to drawing a rectangle for zooming in.

      Pan

      If you want to see a neighboring state without zooming out, use the Pan button.

       1 On the Tools toolbar, click the Pan button .

       2 Move the pointer anywhere into the map view.

       3 Pressing the left mouse button, drag the pointer in any direction.

      4 Release the mouse button. Panning shifts the current map display to the left or right, up or down, without changing the current scale. In the figure, you can see Illinois, Indiana, and Ohio. (See facing page.)

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      Zoom to the full extent

      If you want to zoom out to view the entire map, use the Full Extent button.

      1 On the Tools toolbar, click the Full Extent button . The map zooms out to the outermost extent of all features.

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      YOUR TURN

      Practice using the other zoom functions such as Fixed Zoom In and Fixed Zoom Out, which zoom by a fixed percentage at each click. You can zoom back to the previous extent by using the blue arrow on the Tools toolbar. Zoom to the full extent of the map when you are finished.

      Save the map document

       1 On the Menu bar, click File > Save As.

      2 Save your map document as Tutorial2-2YourName.mxd to your Chapter2 folder in MyExercises. Do not close ArcMap.

      Creating spatial bookmarks

      Spatial bookmarks save the current display, at its current zoom status, with a name. You can then easily return to the saved area by accessing the bookmark. This is useful if you use GIS in presentations or if you want to move quickly to a study area or region of interest.

      Create a bookmark

      1 With the Zoom In button selected, drag the pointer to draw a rectangle around Florida to zoom to the state of Florida. This will zoom in to the extent of the state of Florida.

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       2 On the Menu bar, click Bookmarks > Create Bookmark, type Florida for Bookmark Name, and click OK.

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       3 On the Tools toolbar, click Full Extent.

      4 On the Menu bar, click Bookmarks > Florida. ArcMap zooms to the extent of the saved bookmark for Florida, which can be helpful if you frequently zoom to this extent.

      YOUR TURN

      Zoom to and create spatial bookmarks for California, New York, and Texas or other states that may be familiar to you. Try out your new bookmarks. On the Bookmarks menu, click Manage Bookmarks and remove the California bookmark. Zoom to the full extent when you are finished.

      Save the map document

       1 On the Menu bar, click File > Save As.

      2 Save your map document as Tutorial2-3YourName.mxd to your Chapter2 folder in MyExercises. Do not close ArcMap.

      Identifying breast cancer mortality rates and deaths by state

      Using GIS, you can interact with map layers to get information. The Identify tool is a commonly used point-and-click tool for browsing through attribute data associated with a map feature. In this section, you will use the Identify tool to learn about mortality rates and the number of breast cancer deaths per state and per county.

      Identify features

       1 Turn off all layers except Breast Cancer Deaths by State.

       2 On the Tools toolbar, click the Identify button .

      3 Click inside the state of Texas. images

      The state of Texas temporarily flashes and the results appear in the resulting Identify dialog box. The names of attributes use the following codes: R = Mortality rate per 100,000 people, C = Number of deaths, WM = White Male, WF = White Female, BM = Black Male, and BF = Black Female. Date ranges are also shown: 95_99 = 1995 – 1999 and 00_04 = 2000 – 2004. So, if you are interested in the mortality rate for white females from 2000 to 2004, you would look for the field RWF00_04. You can see that this mortality rate is 23.579. The rate for all ages by state per 100,000 persons is age-adjusted using the US population in 2000. images

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       4 Click another state to see the breast cancer mortality rates for white females from 2000 to 2004.

       5 Close the Identify dialog box.

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      Restrict layers to identify

      If you have many layers turned on, you may have difficulty selecting the appropriate feature to identify.