Lab 2.

Directions:

Finish all tasks in Chapter 3 and tasks 2 through 5 (skip Tasks 1 and 6) in Chapter 4 and submit answers to the questions at the end of this exercise.

Chapter 3.

Task 1 – Examine the Data File Structure of Coverage, Geodatabase Feature Class, and Shapefile

There are replacement directions for the following steps:

1a. To see the E00 file in ArcCatalog: ArcCatalog doesn't show ArcInfo .e00 files by default, but it is easy to configure ArcCatalog to show them. From the ArcCatalogue Tools pulldown menu, choose the Options command, click the 'File Types' tab, and then press the New Type button. In the dialog that appears, type e00 into the 'File extension' field (be sure to use zeros not the letter "O"), type a description such as Export File into the 'Description of type' field, click Change Icon and choose an icon, then click OK. Click OK on the Options dialog too. ArcCatalog will refresh and will now show you e00 files.

1b. To get to the Import from Interchange tool: Click View, select Toolbars, and then select Customize. Click in the box next to ArcGIS 8x Tools on the Toolbar. Close. The ArcView 8x Tools window appears. Select Import from Interchange File from the drop down menu. Continue to Step 2.

7. To add a new feature class to land.mdb: Right click land.mdb and select Import, then Feature Class (single). Use the Input Features browse button to land_arc and select polygon. Type land_arc_polygon for the Output Feature Class name. Click OK.

Task 2 – Workstation Exercises

The next tasks and many throughout the text require the use the command line window, Arc, of ArcInfo Workstation. The following information should help you get started.

Prompt	You type/Enter	This command will …	Arc should respond
Arc:	w	… tell you what directory you are in.	C:\workspace
Arc:	w \temp\chap03	… change the directory to the Chap03 folder in C:temp	Arc:
Arc:	w	… confirm new directory location	c:\temp\chap03
Arc:	w ..	… bring you up one directory	Arc:
Arc:	listgrids (or ‘lg’)	… list any grids there	?
Arc:	listcoverages (lc)	… list any coverages there	?
Arc:	lt	… list any TINs	?
Arc:	arcplot (ap)	… opens subprogram ‘Arcplot’	Arcplot:
Arcplot:	quit	… closes Arcplot/return to Arc	Arc:
Arc:	tables	… opens subprogram Tables	Tables:
Arcplot:	mape (mapextent)	… sets the map extent of display	Arcplot:

1. TIN

The first paragraph asks you to explore the data files in ‘emidatin.’ Do this in Explorer, not Arc.

2. Regions

Again, use Explorer to investigate the data files in ‘fire.’ Also, the text beginning with /* after the Arc commands should not be typed into Arc. These just explain the commands they follow.

3. Dynamic Segmentation

Again, look at the data structure of highway in Explorer.

Questions:

1) Explain how Task 1, Chapter 3 helps to illustrate the differences in data file structure between a coverage, geodatabase feature class and a shapefile.

2) Explain how the Dynamic Segmentation section of Task 3 illustrates the concept of routes as subclasses of a line coverage. In a future with programmable vehicles, how might this be useful?

3) Does the polygon layer created in Task 2, Chapter 4, have topology? Explain.

4) In Task 4, Chapter 4, the attribute table for Latah_streets.shp includes field for geocoding, such as L-ADD_FROM and L-ADD_TO. Is this topology? Explain.

5) What is the correct address that was finally geocoded manually in Task 4?

6) Describe the similarities and differences between on-screen digitizing (Task 2) and scanning (Task 5) for vector data input. When should we use one instead of the other?

7) What differences did you discover during this lab between previous versions of ArcMap and 9.0?