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Understanding the Four Basic Types of Analysis

Understanding the Four Basic Types of Analysis. Paul Trevillion - Esri Michael Sarhan - Esri. What are the four basic types of analysis?. Proximity Overlay Statistical Temporal. Proximity. Michael Sarhan. What is proximity analysis?. Buffer zones around a school.

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Understanding the Four Basic Types of Analysis

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  1. Understanding the Four Basic Types of Analysis Paul Trevillion - Esri Michael Sarhan - Esri

  2. What are the four basic types of analysis? • Proximity • Overlay • Statistical • Temporal

  3. Proximity Michael Sarhan

  4. What is proximity analysis? Buffer zones around a school

  5. How do ArcGIS tools measure proximity? Geodesic Euclidean distance Least-cost path

  6. Categories of Proximity Analysis • Area Expanding • Numeric value • Linear Measure

  7. Proximity Demo Paul Trevillion

  8. Overlay Paul Trevillion

  9. Vector Overlay Which Schools have the most incidents crime nearby?

  10. Overlay techniques Union Intersect Identity OR

  11. Apportioning attributes Before split dfbdfbdfb 100 100 100 Without ratio policy 100 100 100 100 100 100 30 With ratio policy 50 70 70 30 50

  12. Raster Overlay

  13. Overlay Demo Michael Sarhan

  14. Statistical Analysis Michael Sarhan

  15. Types of Statistical Analysis Inferential Statistics Descriptive Statistics Percent of Total Crimes by Ward in the District of Columbia Hot Spot Analysis weighted on Violent crime in the District of Columbia

  16. Descriptive Statistics Mean center total crime by Quarter CY 2014 Mean Center

  17. Descriptive Statistics Standard Deviational Ellipses

  18. Normal and statistically significant distributions Working with data distributions Normal distribution Standard deviation

  19. Inferential Statistics Average Nearest Neighbor Summary The Average Nearest Neighbor tool Dengue fever casesand households

  20. Measures distribution of features and attribute values Inferential Statistics The Spatial Autocorrelation tool Spatial Autocorrelation Report

  21. Inferential Statistics Hot spot analysis

  22. Statistics Demo Paul Trevillion

  23. Temporal Analysis Paul Trevillion

  24. What is temporal analysis? Temporal Variance pH levels measured and analyzed at one location each year Spatial Variance pH levels measured and analyzed for entire reservoir on same day 6.9 7.1 2009 – 6.6 2010 – 6.7 2011 – 6.8 7.0 6.8 7.0 6.9 7.0 6.7 6.7

  25. Incorporating time in your analysis Political violence in Somalia 1997-2011

  26. Temporal patterns and spatial statistics 1969 1985 2002

  27. Space-time analysis vs. time snapshots

  28. Temporal Demo Michael Sarhan

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