1. Introduction to ArcGIS Spatial Analyst
Natalie Culpepper
ESRI-Atlanta

2. Outline ArcGIS Spatial Analyst overview Analysis tools What’s New?
Today’s session will start with an overview of the Spatial Analyst product.
We will then spend most of our time talking about all the analysis tools available in the Spatial Analyst.
Then a little bit about customization, and finally, what’s new in 8.2 and coming in the future.
As we talk about these tools, Jill will be demonstrating some of the functionality by performing a weighted overlay analysis to identify areas in Boulder County, Colorado where wildfire prevention or suppression efforts should be focused

3. What is ArcGIS Spatial Analyst?
Integrated raster and vector spatial analysis tools
Extension product that adds functionality to all ArcGIS applications

4. Key Features More than 300 functions and operators
Analysis on all raster formats
Analysis on all vector formats
On-the-fly projections
Great developer tools

5. The Spatial Analyst toolbar
Has its own environment (not part of geoprocessing)
Has dialogs for the most commonly-used tools
Can compose Map Algebra expressions A

6. Analysis Tools Density Mapping Neighborhood and Block Statistics
Zonal Overlay
Surface Analysis
Hydrologic and Groundwater Analysis
Reclassification

7. Density Mapping
Count occurrences of a phenomena within an area and distribute it through the area.
Use points or lines as input.
Population per Km2
Road density per Mi2
DEMO
Run Density on parcel points

8. Neighborhood and Block Statistics
Calculates a statistic for a neighborhood
Majority, Maximum, Mean, Median, Minimum, Minority, Range, Sum, Standard Deviation, Variety
Used for filtering, data smoothing, and data aggregation

9. Zonal Overlay A zone is all the areas/cells with the same value.
Calculate a statistic within the zones for each cell in a raster.

10. Zonal Overlay (cont.)
Slope
Watersheds
Mean Slope per Watershed

11. Surface Analysis Hillshade Slope Viewshed Cut/Fill Curvature A Demo
Surfaces
Hillshade
Slope
Viewshed
Cut/Fill
Curvature
DEMO
Run Aspect on elevation A
Demo

12. Reclassification Reclassify individual values or ranges of values.
Load and save reclass tables.
DEMO
some explanation
Reclassify fuel type

13. Hydrologic Analysis Create watersheds and stream networks from DEMs
Flow Direction
Flow Accumulation
Watershed Delineation
Flow Length
Sink Filling
Stream Ordering

14. What’s New in Spatial Analyst at 9.2?
Solar radiation tools
New math functions
Weighted Sum tool
Spline with Barriers
Histogram tool colors now match layer

15. What’s New in Spatial Analyst after 9.2?
Performance Improvements
Combine 40x faster (SP1)
Was 1 hr, now 1.5 minutes on 250 thousand combinations
Now works on millions of combinations
Fill 45x faster
Was 9.5 hrs, now 12 minutes on 350mb DEM with over 2 million sinks.
Improved error messages and status
New Contour with Barriers tool