GIS 9/11/08	Emily Gillespie

 QUIZ / Exercises:  These are to reinforce the concepts presented in the GTK book, and what we cover in class.

 

1.  If you were looking for GIS data on your hard drive, what would you use?

You could have folders for specific topics, like shape files, where you would browse, OR you could search on a particular file extension if similar file types were not organized together.
 

2.  What part of the file contains information relevant to the search (among other things)?

The extension contains info about what kind of file you're dealing with, but the title of the file might also, if it were named carefully enough.

 

3.  What is different between a shape file and a layer?

A layer has multiple discrete items on it, that can be overlaid with other layers. For example, the dots representing cities might be a layer, which could be overlaid with another layer containing landscape features.

A shape file would be something like the map of Africa, that you then put a layer 'over.'

To check a few skills, do these exercises using data from Chapter 5:

 

4. What is the area of Swaziland?  

17,164 kilometers.  It doesn't say it, but I assume 17,164 square km.

5. What is the population in 2000 of Gambia?

1,187,693 people

6. What is the horizontal datum name for the countries layer?

D_North_American_1927

7. Who created the cities layer?

ESRI

 

8. Make a map of Africa in which the countries are colored in proportion to their population size.  Pay attention to the number of classes and how the break points are chosen.  Save it as name_africamap.mxd and link it from your web page.