Lab9.a

I.                   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. Types- Local operation, Neighborhood, Global operation.

2.      What are the two types of Algebra used in queries?  Give an example of each.  

Less than <    Greater than >    Equal to =     Not equal to <>

3.      What are the different types of spatial selection operations?                        

                  By Attributes-Set Algebra, Boolean Algebra

By Spatial characteristics- Adjacency, Containment

 II.               

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

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

III.                Exercise 1: Prepare (simplify) a vegetation layer for the Los Angeles region for further spatial analysis.

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

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

8.   How many features (records) exist in the new “VegCov_Clip” feature class?  1450 records

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

§  Use the Select By Location tool to determine how many total wetlands have their centroid in the Point Dume quad.

9.   How many wetland features (records) were selected?  404 records were selected 

10.   How many features (records) were selected?  123 records

§  Export only these selected Riverine wetlands into a new shapefile named “Riverine_FirstInitialLastName”. Make sure to place this new shapefile inside your working directory for Lab 9a on C:/.  Ex. Riverine_rmaas.

§  Capture a screenshot (Alt PrtScr) of your final Riverine layer and paste it into this document.