Lab #9

I.

1.      What is spatial scope and what are the three types?

Special scope is the extent of area of the input data that are used in determining the values at output locations.  There are local operations, neighborhood operations, and global operations.

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

There is set algebra which uses the operations less than(<), greater than(>) equal to(=), and not equal to(<>) which can be applied alone or in combination to select features from a set(one example in book is state = Vermont this will query the state of Vermont out)

There is also Boolean Algebra.  This uses the conditions of OR, AND and NOT to select features.  These expressions are most often used to combine set algebra conditions and create compound spatial selections ((area > 100,000) AND (farm_income < 10 billion))

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

There is ADJACENCY, CONTAINMENT,

II.

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

5.   What features classes are present? __PtDumeQuad, vegetation, wetlands__________________

II.                  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? _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? ___1450_______

III.

9.   How many wetland features (records) were selected? _129____

10.   How many features (records) were selected? _12____