Laboratory Exercise 4

Analyzing Feature Relationships

and

Creating and Editing Data

Background

This laboratory consists of exercises from Chapters 12, 13 and 14 of the lab text, Getting to Know ArcGIS Desktop, with the exercise data obtained from the accompanying CD-ROM.

ArcView is a powerful desktop geographic information system (GIS) developed 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.
 

Lab 4 continues to explore the techniques of  analyzing the relationships between features, and begins to look at how to create and edit data,


In Chapter 12 (Exercises 12a, 12b, 12c), you will learn how to analyze spatial data.

In Chapter 13 (Exercises 13a, 13b), you will learn how to project data.

Chapter 14 (Exercises 14a, 14b, 14c),  introduces you to the techniques of building geodatabases.

It is estimated that it will take from 3 to 6 hours to complete this lab. Please plan accordingly, so that all the answers to this lab are submitted at the same time.


For more information on these concepts, please refer to the ESRI website.


Procedure

Complete the answers to the questions posed below. The questions are based on the work you did in completing the lab exercises above, and the reading for the lab. Please form your answers using MSWORD and attach them to an e-mail addressed to gatemail@hartford.edu. Do not e-mail your answers to the instructor's e-mail!

Questions for Lab 4

Chapter 12 - Analyzing Spatial Data (This is an important chapter relative to the term project)

Q1. What is a buffer?

Q2. Why would you want to create a buffer? Give an example.

Q3. What is the difference between an intersection overlay and a union overlay?

Q4. What is the purpose of the Query Builder?

Q5. What is the difference between the query builder and the field calculator?

Chapter 13 - Projecting Data in ArcMap (This is an important chapter relative to the term project)

Q1. What is a projection?

Q2. Define "geographic coordinate system" and projected coordinate system. How are they different?

Q3. How does ArcMap determine whether or not a data set is projected?

Q4. What is ArcToolbox and what was it used for in this lab?

Q5. Explain why a projected coordinate system is inherently inaccurate?

Chapter 14 - Building Geodatabases

Q1. Define "feature class" and "shape file", and "feature data set".

Q2. What constitutes a spatial reference?

Q3. What is a domain? Why are they used?