GIS Analysis Workshop - Esri › library › userconf › unic... · GIS Analysis Workshop, 2016...
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GIS Analysis Workshop David Attaway
Transcript of GIS Analysis Workshop - Esri › library › userconf › unic... · GIS Analysis Workshop, 2016...
GIS Analysis WorkshopDavid Attaway
AgendaWhat is Hot Spot Analysis?
• The “subjectivity” of maps
• Why do Hot Spot Analysis?
• How does Hot Spot Analysis work?
• Optimized Hot Spot Analysis / Types of Hot Spot Analysis in ArcGIS Online
***New Tools*** - Space Time Pattern Mining Tools
• The new toolsets available (ArcGIS Desktop – ArcMap & ArcGIS Pro)…
What are Web Based Analytics (ArcGIS 10.4)?
• The new capabilities available…
ModelBuilder – Getting Started / Demo
• Create a model or using others
• Streamline the model / Sharing models
What are the PA Tools provide?
• Digging into the toolset…additional tools (Drive time, Route analysis, spot tools, etc.)
Geoanalytics…. What’s coming
Closing
Maps are subjective…
Bronx, NY Water Quality IncidentsJanuary 2010 - Present
Is there a spatial pattern in the location of these water quality incidents?
Maps are subjective…
Ft. Worth, TX Fire Response Times
Is there a spatial pattern in the response times of these fire calls?
Maps are subjective…Southeast USA Economic Resilience to Natural Disasters (Counties) - 2010
Natural Breaks
Equal Interval
Quantile
Geometric Interval
Is there a spatial pattern in economic resilience to natural disasters in the Southeastern USA?
ArcGIS spatial analysis tools
ArcGIS Online ArcGIS for Desktop
Why do Hot Spot Analysis?
1) Exploration: To reveal and quantify patterns that you may not see
2) Regression workflows: Determining if you have spatial dependence
in your residuals (one of the “6 checks of OLS regression”)
3) Interpolation workflows: Spatially dependent data is the foundation
of Geostatistical Analysis methods
Hot Spot Analysis(Getis-Ord Gi*)
given a set of weighted features, identifies statistically significant hot spots and cold
spots using the Getis-Ord Gi* statistic
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4338
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79
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19
71
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39
93
7510
5820
97
49
4459
23
07
81
64
03
2832
08
99
83
28
0348
25
35
65
8979
92
14
15
32 3846
26
4338
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79
5028
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19
71
69
39
93
7510
5820
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49
4459
23
07
81
64
03
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83
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0348
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feature
each
feature has
a
value
Neighborhood
Study
Area
is this
significantly
different from this?
if significantly
higher…
feature is
marked as a
hot spot!
*New Tools*
Space Time Pattern Mining Tools(Create Space Time Cube & Emerging Hot Spot Analysis)
Contains statistical tools for analyzing data distributions and patterns in the context of
both space and time.
Create Space Time Cube…
Summarizes a set of points
into a netCDF data
structure by aggregating
them into space-time bins.
Emerging Hot Spot Analysis…
Identifies trends in the clustering of point
densities (counts) or summary fields in a space
time cube created using Create Space Time
Cube. Categories include new, consecutive,
intensifying, persistent, diminishing, sporadic,
oscillating and historical hot and cold spots.
Demo:
Hot Spot Analysis &
ArcGIS Web Applications
Review of Hot Spot Analysis
• Identifies statistically significant clusters of high and low values
• Determines the probability that spatial clustering in data is NOT due to
random chance
Random…
How different is each value and its
neighbors from the rest
of the study area?
z-score
Finding Hot Spots requires MATH!!!
Getis-Ord Gi* Statistic
Local average
Global average= z-score
z-scores and p-values
Finding Hot Spots can require
user-defined parameters
Hot Spot AnalysisArcMap
Optimized Hot Spot Analysis ArcGIS Online
Optimized Hot Spot Analysis
Distance (d)
z-score
1) Hot Spot Analysis (Point locations)
Types of Hot Spot Analysis in
ArcGIS Online
Chicago
Crimes:
(2014)
DC Snow Removal
Complaints:
Jan 2016 –
Present
NYC
Graffiti:
Jan 2010-
Present
Heat Maps vs. Point Density
vs. Optimized Hot Spot Analysis
Heat Map
Point Density
Hot Spot Analysis
Heat map Hot Spot Map
2) Hot Spot Analysis (Point attributes)
Types of Hot Spot Analysis in
ArcGIS Online
Austria Heavy Metals:
Cadmium Concentration
3) Hot Spot Analysis (Polygon attributes)
Types of Hot Spot Analysis in
ArcGIS Online
Philadelphia Tracts:
Market Potential for MedicaidDC Block Groups:
Republican Party Affiliation
What is geoprocessing?
Geoprocessing is…
• Solve spatial problems
• Diagram workflows
• Ask questions
• Get results
The ArcGIS system for managing and manipulating data
The Geoprocessing Framework – ArcMap and ArcGIS Pro
Tools
Python Window
Search
ModelBuilder
Scripts
Let’s Solve a Problem
Demo:
Modelbuilder and publishing GP Services
Modelbuilder & GP Services
ArcGIS Resources
• Geoprocessing with ArcGIS Pro
- https://pro.arcgis.com/en/pro-app/help/analysis/geoprocessing/basics/what-is-
geoprocessing-.htm
• Communities – Analysis and Geoprocessing
- http://resources.arcgis.com/en/communities/analysis/
• Blogs
- http://blogs.esri.com/esri/arcgis/category/subject-analysis-and-geoprocessing/
• Videos
- http://video.arcgis.com/channels
• Forums
- https://geonet.esri.com/community/gis/analysis/geoprocessing
What do the PA Tools
accomplish?
ArcGIS Predictive Analysis Tools
Predicting Drug Trafficking Locations and Movements
• Where will they likely have a farm site?
• How quickly can they transport their product?
• Use doctrinal knowledge to set movement constraints
• Use past data to optimize searching for farms
• Auto-generate search criteria
• Find likely travel routes from the farms to the ocean
Demo Scenario
Demo:
ArcGIS Predictive Analysis Tools
Drug Grow
Counter proliferation
Overview
• ArcGIS Desktop Add-in --- FREE
• Set of tools for…
- Raster-based querying
- Mobility and proximity data creation
- Temporal analysis
Predictive Analysis Tools
Providing Massively Parallel Processing
. . . Creating New Insights
Big Data GeoAnalytics and Visualization of Massive Data
Raw Data
Parallelized Analyticson Vector and Raster Data
Aggregated Data
Hot Spots
Coming Later
This Year…
Thank You to the
Sponsors & Organizers
