imagery across the arcgis platform multiple storage formats through releases • raster dataset...
TRANSCRIPT
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Imagery Across the ArcGIS PlatformKatja Krivoruchko
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Agenda
• How imagery is used in GIS• Imagery management
- Visualization and analysis
• Disseminating imagery• Implementation scenarios• Steps to success• Resources
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ArcGIS 10 — A Complete System
EasierMore Powerfuland Everywhere
Cloud
Enterprise
Local
• Discover• Create• Manage• Visualize• Analyze• Collaborate
Mobile
Desktop
E
Web
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What is “imagery” in GIS?
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In Performing Complex AnalysisI P f iP alysisComplex AnaaC
GIS Professionals Use Imagery in Many Ways
Imagery is core to ArcGIS
As BasemapsData Managementta MaManagementMa
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Managing imagery data
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Imagery Management Challenges
• Many sources- Aerial photographs- Satellite imagery from many sensors- DEM and scanned maps- Analytical data, pictures
• High resolution and large volume Procured as Background
Acquired forAnalysis
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Goal: Maximize the Value of Imagery
• Providing Image Accessibility:- Timely- Quickly- Accurately- Simply
• Exploiting Rich Information Content:- Resolution- Temporal change- Spectral range- Dynamic range
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Choosing Appropriate SoftwareConsiderations
• Based on business workflows…- Do I need to serve just raster data? Maps? Tools?- What client applications should the solution support?- How often do my rasters get updated?- Is good quality raster data available as a service?
• …and IT capabilities:- What is my network bandwidth?- Does staff know IIS (Tomcat, etc.)? Do I have a DBA?- Will I need any custom development? Do I have
programmers? - Will I do implementation in-house or will I hire a
consultant?
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Multiple storage formats through releases
• Raster dataset (8.0)- A single image
• Raster catalog (9.0)- A collection of raster datasets
• Raster attribute (9.0)- A table or feature class field containing
picture attributes
• Mosaic dataset (10.0)- Enhanced raster catalog with on the fly
processing capability
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Imagery storage options at ArcGIS 10
• Options- Files on disk- ArcSDE geodatabase- Mosaic dataset
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File Server
• Highly compressed data (.sid, .ecw, etc.)• Commonly used in raster catalogs
.sid
MyImage
MyImage
MyImage
MyImage
MyImage
Network
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ArcGIS Server Basic Edition (ArcSDE)
Network
Client Application
Database
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Storing imagery in ArcSDEConsiderations
• Loading rasters into database takes time• Duplicating data (original tiles and database)• Provides exceptional security/scalability options
- Options depend on specific RDBMS
• Using ArcSDE just for raster serving not recommended
- Significant investment into infrastructure, software, and staff training
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Mosaic DatasetOptimum Model for Image Data Management
• Definitions stored in a geodatabase- Rasters can remain in original format
• Ability to quickly Catalog:- All raster datasets- Imagery from different sensors
• Ability to define:- Processing to be applied- Default viewing rules
• Accessible in all ArcGIS applications
Available with ArcEditor and ArcInfo license
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On-The-Fly ProcessingCreate Multiple Products from a Single Source
• Imagery processed as accessed
• Processes• Stretch, extract bands
• Clip, Mask
• Reproject, orthorectify, pan sharpen
• Vegetation index, classify
• Shaded Relief, slope, aspect
• Color correction
Utilize the full image information content
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Dynamic MosaickingMosaicking Multiple Images On Demand
• Fuse imagery from multiple sources• User control of Mosaic Method
• By Date –’Latest’, ‘Closest to May 2001’
• By Attribute – ‘Highest Sun Angle’
• By Viewpoint – North, South, East, West
• User Query – ‘Landsat imagery, with no cloud, later than June 2001’• Set default - Users see best available imagery
Utilizing information from overlapping images
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DemonstrationMosaic Dataset
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Image Analysis Window - ArcMapBetter Interpretation & Understanding of Imagery
• Single Button Access to- Image Enhancements- Image Interpretation- Image Processing
• Save functions in Layers
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Image Classification ToolbarPart of Spatial Analyst Extension
• Training Sample Manager- Supervise & Unsupervised- Class Probability- Principle Component Analysis- Define training areas graphically
• Generate Signature
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Data Management Recommendations
• Use existing data model if it continues to meet your application requirements
- If desired, migrate to the mosaic dataset to take advantage of its functionality
• Use the mosaic dataset to new applications
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Disseminating imagery
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Disseminating imagery
• Method depends on user needs:- May need pixels for analysis- May want imagery as background
• Options- Access public data (e.g. ArcGIS Online)- Access imagery directly (in geodatabase or file)- Publish imagery as a web service
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ArcGIS Online imagery
• Ready-to-use Maps and Globes- Use in Desktop and Server
• Content also available behind firewall- Data Appliance
• United States Imagery 1m or better- New sub-meter Imagery in Metro Areas
• Elevation data- GTOPO, SRTM, USGS NED (1 & 1/3 arcsecond)- Hillshade, slope, aspect, shaded relief services- Profile, viewshed, contour tasks
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Imagery
Streets
Community BasemapsAuthoritative Content Developed and Shared by the GIS Community
Topographic
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Serving your own data
• ArcGIS Server map service• ArcGIS Image service• ArcGIS Image extension
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ArcGIS Server map service
• Serve raster and vector data- Consume in ArcMap and Web applications
• Ability to cache data
ArcGIS Desktop
Browsers
ArcGIS Mobile
ArcGISExplorer
Geodatabase
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Cached Versus Dynamic Services
• Dynamic Layers contain rapidly changing data
- View of most recent work orders
• Cached Layers contain more slowly changing data
- Parcel map, streets, topographic maps
• The classification is subjective and application specific
s
1:500,000
1:250,000
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ArcGIS Server Standard/AdvancedConsiderations
• Caching highly recommended for raster data- Caching takes time and disk space- In a web application, zoom limited to predetermined
scale levels- In desktop applications, resampling occurs
• Can be used to overlay vector and raster data
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ArcGIS Server image services
• Core capability of ArcGIS Server• Serve raster datasets • Functionality:
- Can include functions- Client defined properties- Compression for Transmission over slow networks- Export – User defined projection and extents
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ArcGIS Server Image Extension
• Extends Image Service to serve mosaic datasets- Can serve more than one raster
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Demonstration Disseminating imagery
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Implementation scenarios
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Implementation Scenario
• Organization:- Small Port Authority- About 10 square miles of area (800 MB of data)
• Business Needs: - Enable non-GIS users to make a map of work area
• Data Needs: - One raster layer (does not change)- Several background vector layers ( change quarterly)- One layer with dynamic data (permitting)
• IT Capabilities:- GIS staff of one; no DBA- One server
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Implementation Suggestion
• Web application for non-GIS users with minimal functionality
• Cached raster data (background)• Dynamic vector data (permitting layer)• Vector data stored and edited in ArcSDE• Software Solution: ArcGIS Server Standard
Workgroup- Does not require DBA for data management- Best performance over the network with cached rasters- Easy-to-use web application interface for non-GIS
professionals
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Implementation Scenario
• Organization:- Engineering firm- Many projects over a large area
• Business Needs: - Create derivatives from DEM data (aspect, slope,
hillshade, etc.)- Expose authoritative data for each area, to internal users
• Data Needs: - DEM data from several sources- Constantly looking for new, better data
• Capabilities:- Robust knowledge of servers- Existing user of Esri server technology
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Implementation Suggestion
• Need to create multiple elevation derivatives• Potentially large number of outputs is hard to store
and manage
• Software Solution: ArcGIS Server Image Extension- Virtual products created “on-the-fly”- No duplication of data
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Implementation Scenario
• Organization: - Conservation Organization- Large service area, small project areas
• Business Needs:- Deploy raster data fast with minimal administration
• Data:- Image tiles of service area
• IT Capabilities:- Limited IT support
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Implementation Suggestion
• Implementation Suggestion 1: ArcGIS Online- Cached web services for USA include imagery, street,
political maps- Very good data available for free
• Implementation Suggestion 2: Mosaic dataset- Requires almost no processing time- Accessible to ArcView users
• Implementation Suggestion 3: File server- Requires almost no processing time- Esri & 3rd party clients can access data- Performance issues – use highly compressed format
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Implementation Scenario
• Organization:- Large Utility in “Hurricane Alley”
• Business Needs:- Large amounts of imagery need to be deployed
enterprise-wide monthly and more often during emergencies
- Imagery needs to be accessible to variety of client applications, including web applications, CAD, and GIS clients
• IT Capabilities:- Robust network infrastructure
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Implementation Suggestion
• Avoid loading imagery into database or caching- Too much data (takes too long to load)- Changes too fast (short lifespan once loaded)
• Expose imagery to non-Esri clients• Implementation Suggestion: ArcGIS Server Image
Extension- No data loading (still need to build service overviews)- No data pre-processing- Accessible by multiple client applications
- ArcIMS, ArcGIS Server, AutoCAD, Microstation, Desktop
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Implementation Scenario
• Organization- County Government
• Business Needs- Access to “better” (more detailed) elevation data via
ArcGIS Explorer
• IT Capabilities- Existing ArcGIS Server Standard Enterprise
implementation- ArcGIS Server web services currently used in internal
and external web applications- Knowledgeable DBA, web administrator
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Implementation Suggestion
• Leverage existing technology• Elevation data does not change often
• Implementation Suggestion: ArcGIS Server Globe Service
- Leverage existing software- Improve performance of elevation service by caching
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Implementation Scenario
• Organization- Large city
• Business needs- Make imagery available to ArcGIS Desktop users and
web applications
• IT capabilities- Existing Esri users, including of server technology- Requirement to store all data inside Oracle database
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Implementation Suggestion
• Consider IT restrictions- Leverage DBA skills
• Consider two types of users
• Implementation Suggestion• For storage: ArcSDE
- Comply with database requirement
• For the web application: ArcGIS ServerCache the rasters
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Steps to SuccessTest, Test, Test
• Begin with needs assessment- Esri offers Professional Services to help get started
• Whatever solution you choose, test it• Testing includes
- Functionality testing- Performance testing
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Functionality vs Performance testing
• Functionality testing- Is web browser app really going to meet my business
needs?
• Performance testing- Shapefiles were slow, but is ArcSDE really any faster for
me?
• Esri offers special (=cheaper) licenses for development and testing environments
- Talk to your account manager
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Steps to SuccessPlan for Success
• Have a plan for urgent situations- Identify support channels for new workflows
- Internal Help Desk? External tech support?
• Services Available from Esri- Help Desk Setup Assistance- Premium Support Services (PSS)- Professional Services- EEAP (Esri Enterprise Advantage Program)
• Remember, Failing to Plan is Planning to Fail
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Resources
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Training
• Training is mission-critical• By investing in staff training, you:
- Speed up implementation- Save time- Saving time means saving money
• People ultimately bring life to GIS and insure a successful implementation
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Esri Training
• Esri offers a variety of training options- Free or low cost Virtual Campus Training- Instructor-led virtual and classroom training- Client-site training- Custom training
• Multiple options for developing a training plan- Work with your Training Consultant (Carol Dargatz) and
your account manager
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System Architecture Design
• Many Resources Available- Enterprise GIS Resource Center
- Contains benchmarks- Building a GIS book with On-line Resource
center
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Esri Enterprise Advantage Program
• Subscription program designed to provide ongoing advisory
- Great for ongoing project and software support- Pre-paid subscription to be used throughout the year as
needs arise
• Includes - Technical Advisor- GIS environment review- Credits to be used for Professional Services or Training- Annual account and GIS strategy review
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Resources
• Imagery Resource Center:• http://resources.arcgis.com/content/imagery• Imagery Blog:• http://blogs.Esri.com/Dev/blogs/imagery/default.aspx
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