Lab #10: Data Entry

I. Read Bolstad Chapter 4 and answer the following questions based on the reading and lecture. 　
1.  Would you have more problems with feature generalization and omission in large or small scale maps? Why?
Large Scale because when zoomed in more a map needs more detail. Generalization and omission doesn't give detail.

2. What is snapping in the context of digitizing? Why is snapping important (i.e. what does it help avoid)?
Snapping is automatically setting nearby points to have the same coordinates and it is important because it helps avoid overshoots and undershoots.

3. What is COGO and how does it relate to coordinate surveying?

Coordinate Geometry is the spatial data that consists of a starting point with a list of directions and distances to other stations. COGO brings spatial data into an earth based map coordinate system.
II.

EXERCISE A

3.a) What is the feature class type (point, line or poly) for Springs? Point

EXERCISE B

STEP 2: Build an Address Locator and Geocode an address table.

Lab 9b: More Practice with Spatial Analysis

1. How many counties does the State of Iowa contain? (1 pt)
　99
2. Which county in Georgia contains the largest number of people, as of the year 2001? (1 pt)
　Fulton
3. How many cities, with populations between 10,000 and 49,000, are located within the State of Washington? (1 pt)
　31
4. How many miles long are all of the interstates in Los Angeles County? (1 pt)
　41055. Simplify the UrbanBoundaries feature class so that only the urban areas of Los Angeles County are visible (Hint: you must use one of the overlay functions). Create a new feature class and save it into the LosAngeles dataset using the name LA_Urban. Include a screenshot of this new layer with your assignment. (2 pts)
　

6. How many acres of urban area lie within Los Angeles County, based upon your results from question #5? ( 1 pt)
1,441,652.796875

8. Create a layer displaying the provinces of Canada using the data provided to you in the Canada feature dataset. Save this new layer under the Canada feature dataset using the name Provinces. Include a screenshot of this new layer with your assignment. (2 pts)

9. Which Native American Indian Reservations lie within 75 miles of the City of Thurso in Canada? (1 pt)
Kitigan Zibi Indian Reserve and Akwesasne Indian Reserve 15

7. How many zip codes have their centroid in Los Angeles County? (1 pt)
522

10. Open your final and complete geodatabase in ArcCatalog. Make sure all of the feature datasets and feature classes are viewable. Capture a screenshot of the geodatabase and include this screenshot with your assignment. (1 pt) 

Post your answers to your blog by
Monday, November 8th, 2010. (Note: The quiz on Monday the 8th will cover all information through Lab 9b.)

Lab #9a: Introduction to Spatial Analysis

I. Read Bolstad Chapter 9 (pages 295-306 only) and answer the following questions based on reading and lecture.

1. What is spatial scope and what are the three types?
The extent or area of the input data that are used in determining the values at output locations. The Three types are Local Operation, Neighborhood Operation, and Global Operations

2. What are the two types of Algebra used in queries?  Give an example of each.
Set Algebra: <, >, =. Ex. State=California
Boolean Algebra: And, Or, Not. Ex. A OR B

3. What are the different types of spatial selection operations?
By Attributes - Set Algebra and Boolean Algebra
By Spatial Characteristics - Adjacency and Containment

II. AFTER completing Ormsby Chapters 10 & 11, complete the following exercise.

4.   Is there a feature dataset in the geodatabase? Yes

5.   What features classes are present? PtDumeQuad, Vegetation, Wetlands, Wetlands_Project.

III. Exercise 1:

6.   How many features (records) exist in the Vegetation feature class in the Lab9aData.mdb geodatabase? 10896

7.   How many features (records) exist in the new VegCov feature class after running the dissolve operation?
   9  

8.   How many features (records) exist in the new “VegCov_Clip” feature class? 8

IV. Exercise 2: Generate a layer of Riverine wetlands that fall in the Point Dume quad. 

9.   How many wetland features (records) were selected? 383

10.   How many features (records) were selected? 117

 

Due: Wednesday, October 27th, 2010