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Introduction to ArcGIS Spatial Analyst. Natalie Culpepper ESRI-Atlanta. Outline. ArcGIS Spatial Analyst overview Analysis tools What’s New?. What is ArcGIS Spatial Analyst?. Integrated raster and vector spatial analysis tools

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introduction to arcgis spatial analyst

Introduction to ArcGIS Spatial Analyst

Natalie Culpepper

ESRI-Atlanta

outline
Outline
  • ArcGIS Spatial Analyst overview
  • Analysis tools
  • What’s New?
what is arcgis spatial analyst
What is ArcGIS Spatial Analyst?
  • Integrated raster and vector spatial analysis tools
  • Extension product that adds functionality to all ArcGIS applications
key features
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
slide5

The Spatial Analyst toolbar

Has dialogs for the mostcommonly-used tools

Can composeMap Algebraexpressions

Has its own environment (not part of geoprocessing)

A

analysis tools
Analysis Tools
  • Density Mapping
  • Neighborhood and Block Statistics
  • Zonal Overlay
  • Surface Analysis
  • Hydrologic and Groundwater Analysis
  • Reclassification
density mapping
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
neighborhood and block statistics
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
zonal overlay
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.
slide10

Mean Slope per Watershed

Watersheds

Zonal Overlay (cont.)

Slope

surface analysis

Surfaces

Surface Analysis
  • Hillshade
  • Slope
  • Viewshed
  • Cut/Fill
  • Curvature

A

Demo

reclassification
Reclassification
  • Reclassify individual values or ranges of values.
  • Load and save reclass tables.
hydrologic analysis
Hydrologic Analysis
  • Create watersheds and stream networks from DEMs
    • Flow Direction
    • Flow Accumulation
    • Watershed Delineation
    • Flow Length
    • Sink Filling
    • Stream Ordering
what s new in spatial analyst at 9 2
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
what s new in spatial analyst after 9 2
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