Advanced GIS for UCCE Data

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Advanced GIS for UCCE Data

• August 22, 2007
• Karin Tuxen-Bettman
• GIIF
• Maggi Kelly
• Department of Environmental Science, Policy, and
  Management
• http//giif.cnr.berkeley.edu

We will begin at 910 PM. Login info Username
!workshopuserPassword 1WRKshop USR!Domain
CAMPUS
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Geospatial Informatics
Remote Sensing
GIS
Internet
Spatial Analysis
Supporting research management
in the natural social sciences.
GPS
Visualization
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GIIF Services
Training Workshops
Support Consulting
Map Poster Printing
Data Database Services
WebGIS Services
GPS Rental
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This Mornings Outline

• GIS data formats
• Geoprocessing spatial analysis
• Introduction to the morning lab
• Field exercise Explore different types of GIS
  data, create a new shapefile, perform joins and
  geoprocessing commands, and create map for export.

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GIS Data Types

• Vector
• Shapefile
• Coverage

• Raster
• Grid
• Images

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GIS Data gt Vector gt Shapefile

• Features points, lines polygons
• Attributes size, type, length, etc.

Image credit K. Kurland
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GIS Data gt Vector gt Shapefile

• How shapefiles look in ArcCatalog

• How shapefiles look in your folder

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GIS Data gt Vector gt Coverage

• Coverages are vector data that are based GIS
  topology, which is the spatial relationship
  between geographic features.
• A coverage can be made up of points, arcs, and
  polygons

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GIS Data gt Vector gt Coverage

• How coverages look in your folder

• How coverages look in ArcCatalog

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GIS Data gt Raster gt Grid

• Represented in pixels, or cells

ncols 157nrows 171xllcorner -156.08749650000yll
corner 18.870890200000cellsize 0.008333000 0 1
1 1 2 3 3 5 6 8 9 12 14 18 21 25 30 35 41 47
5359 66 73 79 86 92 97 102 106 109 112 113 113
113 111 109 106103 98 94 89 83 78 72 67 61 56 51
46 41 37 32 29 25 22 19etc...
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GIS Data gt Raster gt Grid

• Continuous
• Examples
• Raw imagery
• Digital Elevation Models (DEM)
• Digital Surface Models (DSM)
• Digital Terrain Models (DTM)

• Thematic
• Examples
• Vegetation type
• Habitat type
• Soil map (if represented in raster)

Raw imagery - Continuous
Elevation - Continuous
Vegetation Type - Thematic
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GIS Data gt Raster gt Images

• Examples
• Aerial photography, e.g. color-infrared or
  true-color aerial imagery
• Satellite imagery, e.g. Landsat, QuickBird, SPOT
• Digital Ortho Quarter Quad (DOQQ) ? Aerial photos
• Digital Raster Graphics (DRG) ? Digital topo
  quads
• File types
• TIFF or GeoTIFF (.tif)
• Erdas Imagine image files (.img)
• JPEG (.jpeg)
• MrSID (.sid)

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GIS Data gt Geodatabases (can store both
types)

• Enterprise geodatabases
• Requires a host DBMS
• SQL Server, Oracle, or IBM DB2
• Personal geodatabases
• Based on the Microsoft JET engine
• Appears as an .mdb file (Microsofts JET engine
  is also used by Microsoft Access).
• File geodatabases
• Stored in files, not Access.
• No 2 GB limit!

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GIS Data gt Geodatabases (can store both
types)
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Vector Data Examples
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Raster Data Examples
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Geospatial QueryPOINTS near LINES

• Select by location Toxic release sites within 1
  mile of a river

Image credit K. Kurland, 2006
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Geospatial QueryPOINTS near POINTS

• Select by location Schools within ½ mile of
  polluting companies

Image credit K. Kurland, 2006
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Geospatial QueryPOLYGONS intersecting LINES

• Select by location Municipalities that intersect
  Interstates

Image credit K. Kurland, 2006
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Geospatial QueryLINES intersecting POLYGONS

• Select by location Lines intersecting polygons

Image credit K. Kurland, 2006
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Geoprocessing Tools
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Model Builder
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Lake Tahoe Datahttp//tahoe.usgs.gov
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Lake Tahoe DataVarious data formats
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Create points with X,Y coordinates (i.e. from GPS)
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Join tables
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Clip census layer
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Buffer points
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Calculate distance between points
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Create surface of road density
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Interpolate surface of Dissolve Oxygen
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Create choropleth map
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Create graduated symbols
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Lab Exercise

• Explore GIS data
• Add your GPS data
• Create new shapefile
• Join tables
• Perform geoprocessing
• Create and export a map
• Experiment with other toolsand functions