Laboratory Exercise 4
This laboratory consists of exercises from Chapter 12 of the lab
text, Getting to Know ArcView GIS, with the data obtained
from the accompanying CD-ROM (exercises 12a,b).
ArcView is a powerful desktop geographic information system (GIS) made
by Environmental Systems Research Institute (ESRI). With ArcView, you can
load any data that's linked to geographic locations and display it graphically
as maps, charts and tables. You can also edit the data , change the way
it's displayed, append additional data, create some of your own, perform
queries to answer specific questions, or meet certain criteria, and analyze
information statistically as well as spatially. Results can be shown as
quality graphic presentations to print out or display your screen.
In this exercise, you will learn that when you zoom in or out in a view,
or resize a view's window, that the scale automatically changes, and that
you can directly specify the scale you want the view drawn to. You will
also learn how to set minimum and maximum threshold scales for particular
themes in a view so that they appear in the view when the scale values
are set above or below the specified thresholds.
With the supervision of your instructor, or lab coordinator, use
the Getting to Know ArcView GIS CD-ROM to carry out the directions
of exercises 12 a,b. The path to the exercises may vary from PC to PC,
so check with the lab instructor or lab coordinate.
Q1. How does the scale of a view change as you zoom in?
Q2. Map scale is defined as:
Q3. ArcView calculates a view's scale using which units?
Q4. Why was it necessary to set a maximum scale value for the "Streets"
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