1. CE 525

2. REGRESSION VIDEO Return Quiz Why regression? Re-watch video as it will be on the midterm! 1. This is the difference between actual observed values and predicted values. 2. This tool, new to ArcGIS 10.0, tries every possible combination for a set of Explanatory Variables to find the best fit for a model. 3. All of the tools discussed in the video are located in which toolbox in ArcGIS? 4. The video referred to 6 checks to determine the validity of a given model. Name 2 of those checks. 5. These are the Variables we think contribute to the Dependent Variable.

3. SPATIAL ANALYSIS DATA Get from website

4. SET YOUR PROJECTION Before adding any data, set the Dataframe properties to GCS (NAD 1983) After adding tornado data, Export them using the coordinate system of the Data Frame Or try using the Define Projections tool

5. CLIP Use the CLIP tool to create a new dataset from the Input Features containing only those features inside the Clip Features

6. MERGE You can MERGE multiple datasets to create one new dataset In order to use MERGE, the datasets must have identical attributes FUN FACT: if there are selected features in the datasets to be MERGED, the new dataset will be made up of only those selected features

7. MERGE

8. CLASSIFICATION METHODS OF CLASSIFICATION Natural Breaks Quantile Equal Interval Manual Others

9. CLASSIFICATION CLASSIFICATION OPTIONS Number of Classes Break Values Sampling Size Manual Others

10. RASTER CALCULATOR Use multiple Raster datasets added together to create a new Raster

11. WEIGHTED VARIABLES Non-weighted variables create a dot with a value of ONE or Zero Weighted Variables assign magnitude based on the chosen variable

12. CALCULATE GEOMETRY Change Data Frame to State Plane coordinate system (NAD_1983_StatePlane_Indiana_West_FIPS_1302_Feet) Add Field to Attribute Table Double Precision 10 Scale 10 Calculate Area in Square Miles Why can’t this be done in GCS? What can we do in GCS?

13. SPATIAL JOIN Spatially Join Counties layer to Merged Tornadoes layer Choose a summary (this will add a count) This is a secondary function for this tool, but it’s handy

14. FIELD CALCULATOR Add Field to Attribute Table Double Precision 10 Scale 10 Field Calculator (Count of Tornadoes) / (Area)

15. SCRIPTING Add Field to Attribute Table Double Precision 10 Scale 10 Use the following Piece-wise function: Mobile homes < 1000: TRI = 0.4 x (1990 Pop. Density) + 0.6 x (Tornados per Sq Mi) + 5 1000 < Mobile homes < 2000 TRI = 0.6 x (1990 Pop. Density) + 0.4 x (Tornados per Sq Mi) + 5 Mobile homes > 2000 TRI = 0.8 x (1990 Pop. Density) + 0.2 x (Tornados per Sq Mi) + 5