Spatially Enabling Your Java Technologybased Applications

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Spatially Enabling Your Java Technology-based
Applications
Using MapObjectsJava Standard Edition

• Eric Bader
• Product Specialist/Developer
• Environmental Systems Research Institute

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Goal
Explore the benefits of integrating spatial
analysis objects into Java-based applications
Beginning
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Speakers Qualifications

• A lead Product Specialist at Environmental
  Systems Research Institute, Inc. (ESRI)
• 13 years experience in Geographic Information
  Systems (GIS)

• About ESRI
• The world leader in the GIS software industry for
  the past 32 years
• More than 1 million users in more than 229
  countries

Beginning
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Learning Objectives

• As a result of this presentation, you will be
  able to
• Recognize the importance of geography in
  information systems applications
• Understand how to design and build spatially
  enabled Java-based applications

Beginning
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Presentation Agenda or Key Topic Areas

• Define Spatial
• What questions can be answered by adding a
  spatial dimension to your application
  requirements?
• What is needed to spatially-enable your
  applications?
• Using MapObjectsJava to spatially enable your
  applications

Beginning
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Geography Matters
What do we mean by SPATIAL?

• Linking location to information
• Estimates say 80 of all data contains a
  spatial component
• Scenarios
• Store chain management
• Where are my potential customers?
• Where are my competitors?
• Crime analysis
• Where are the crimes occurringand why THERE?
• Emergency response
• What parcels are located in potential flood
  zones?

Middle
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What is GIS?

• Many definitions...
• Smart maps
• A way to link databases to maps
• A tool for analyzing data by location

Database
Map Spatial presentation
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The Spatial Data Model

• Layers of data overlay themselves in a Map
• Layers of data are integrated from differing
  Layer sources
• Distributed GIS Layer sources come from (served
  from) different locations, across different
  platforms
• Layers contain features georeferenced geometry
• Layers of data, combined into a map, model the
  real world

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Enterprise GIS

• Promotes data sharing and integration
• Enterprise and local sources come together

Mapping Services
RDBMS
Map
Local files/images
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Benefits of Spatial Applications

• Cost Savings
• Operational Efficiencies
• Better Data Management
• More Efficient Storage and Update
• Sharing of Integrated data sources
• Better Decisions
• Faster Information Access
• Enhanced Capability
• New Applications

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What is needed to build spatial applications?

• Tools
• Java APIs for map display and query
• Java APIs for data access
• Data
• Spatial
• Coordinate information (x,y)
• Non-spatial
• Attributes/tabular

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Elements of Spatial Analysis

• Map display
• Data Presentation Data Layers
• Symbology rendering of data

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Elements of Spatial Analysis

• Information Queries
• By attribute state_name Nebraska
• Spatially select all pizza stores within 1 mile
  of my house
• Analysis tools
• Buffering
• Data classification
• Distance measurement
• Topology (spatial feature relationships)
• Address Matching/Geocoding

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Spatial APIs for the Java Platform
Using ESRIs MapObjects

• Spatial data access and visualization
• Querying spatial information
• Spatial analysis tools
• Design-time development
• Not an application, but a set of development
  libraries for building geography-based systems

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MapObjectsJava Edition
Why use MapObjects?

• Roughly 1000 public classes and methods providing
  map display and query capabilities
• Pure Java built on the Java 2 platform
• Provides high-level, JFC/Swing components for
  rapid application development
• Aggregated components, ready to use
• Contains low-level APIs for fine-grained control
• Data access
• Display management
• Design-time JavaBeans for rapid development

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The Map Component

• JFC/swing JLayeredPane
• Displays geographic information on a canvas
• Consists of several component layers
• Map canvas layers
• 0 or more of AcetateLayers
• Event layer for capturing mouse events
• Can contain tools for user interaction
• Rubberbanding
• Drawing geometric shapes
• Contains any number of layers in a Layerset

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The Map Component
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Layer Objects

• Proxies for external data sources
• Create Layers of features to be added to a Map

Data sources
ArcSDE
Shapefile
Layersource
Layer
Image
Mapservices
Custom
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Object Model Overview
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Table of Contents (TOC)

• A visual representation of Layers in a Map
• Controls visualization of layers
• Each Layer is a legend item

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Functional Toolbars
ZoomPanToolbar

• A single toolbar component
• handles all panning and zooming actions within a
  map display
• Listens to Map and Layer objects
• Contains its own Actions
• Customizable

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Functional Toolbars
SelectionToolbar

• Handles all feature selection and query
  functionality
• Graphic selection
• Query
• Identify
• Buffer
• Find
• Attribute List

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Functional Toolbars
MeasureGeocodeToolbar

• Provides the geocoding user interface component
  
• Calls MapTips user interface component
• Provides the measure tool

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Building an Application

• Create and add the Map component
• Create and add layers to the Map
• Map m new Map()
• m.getLayerset().addLayer(aLayer)
• aContentPane.add(m,BorderLayout.CENTER)

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Building an Application

• Create and add a TOC
• Toc toc1 new Toc()
• toc1.setMap(m)
• aContentPane.add(m,BorderLayout.WEST)
• Create and add a functional toolbar
• ZoomPanToolBar zbar new ZoomPanToolBar()
• zbar.setMap(m)
• zbar.setSelectedLayer(m.getLayerset().LayerAt(0
  ))

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MapObjectsJava Edition
Demonstrations

• IDE and design-time development
• ArcExplorer application Browsing integrated data
  sources

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Other Information

• ESRIs Distributed GIS Solution ArcIMS 4.0
• http//www.esri.com/software/arcims
• ESRIs portal for GIS services The Geography
  Network
• http//www.geographynetwork.com
• Download the MapObjects-based Java viewer
  ArcExplorer 3.1 FREE!
• http//www.esri.com/software/arcexplorer
• Gis services reference Site
• http//www.nationalgeographic.com/mapmachine

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Summary

• Spatial information enhances the effectiveness of
  your Java applications
• Rapid Application Development can be accomplished
  in the Java environment
• Data integration is the key

End
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