Transcript Developing GIS WebParts in SharePoint

Voter Information Portal
Presented by:
Marianne Cardwell, Woolpert, Inc.
Cheryl Spencer, City of Indianapolis
February 23, 2010
Overview
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History
Demo
Architecture
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HISTORY
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History
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First Polling Place Locator in late 1990’s.
Original vision
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To locate a voter’s polling location based on
their address.
Used ArcIMS-based technology to display
polling location information in a web
application.
Voter Information Portal (VIP) is the 4th
generation of the Polling Place Locator.
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Challenges
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Geocoding
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Used fallback (composite) geocoding from
parcels to streets.
Unable to locate 100% of addresses in Marion
County
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Missing information
Match scores not meeting threshold set in locator
In a few cases street range interpolation put
the address coordinate in the wrong precinct.
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Geocoding
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Geocoding (2)
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Geocoding (3)
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Application and Server Performance
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Indiana Statewide Voter Registration
System
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Voter Information Portal
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Upgrade technology
Find a way to achieve better geocode
matches.
Same functionality as previous versions
with the addition of sample ballots.
Create a management portal for the
Election Board personnel to manage
candidates, sample ballots, and update
elected official information.
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DEMO
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VIP Demo
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Include video, just in case!
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ARCHITECTURE
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Overall Architecture (1)
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Overall Architecture (2)
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Service-oriented architecture.
Bulk of logic in services.
JavaScript code mainly contains page
layout and interaction.
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Dojo Widgets
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VIP uses 10 custom widgets:
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Address component: provides geocoding-like
functionality.
Tabs: each VIP tab is a widget. Provides user
with information obtained from the Elections
Service.
Directions widget: provides directions using
Microsoft’s Bing Maps API.
Widgets developed so they can be used in
other web applications.
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Address Component (1)
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Custom Dojo widget used within a number of
online city applications.
User can enter street addresses or
intersections.
Lists suggestions.
Uses city’s Master Address Database
(MAD). No geocoding or ArcObjects.
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Address Component (2)
150 E Washington St
MAD
(Oracle)
GIS
(SDE)
Parcel
Addresses
Parcels
Polygon
FC
Building
Addresses
Buildings
Polygon
FC
Unit
Addresses
Units Point
FC
Street
Address
Ranges
Streets
Polyline FC
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x0,y0
100
x1,y1
x2,y2
x3,y3
200
Election Service – Structure
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WCF Service with 2 interfaces with
identical methods:
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Client-side applications interface: methods are
REST-enabled and called via GET requests.
All input parameters are strings.
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Server-side applications interface: service can
easily be added as a service reference in
Visual Studio. Input parameter types vary.
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Election Service – Functionality
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Possible Inputs:
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Address
XY coordinates
Precinct
Returns:
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polling place locations
satellite voting locations
voter registration information
voting districts
elected officials
candidates
ballots
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Obtaining Polling Place
Query
Web Service
Input: XY
coordinates
Point in Polygon
Query: which
precinct polygon
is point in?
APIP
Web Service
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Tabular Query:
which polling
place is
associated with
the precinct?
Obtaining Elected Officials (1)
Input: XY
coordinates
Tabular
Query: get list
of positions
Point in Polygon
Query: which
precinct is it in?
APIP
Web Service
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For each
position, get
precinct
feature class
Tabular Query:
which elected
official is in this
position in this
district?
Obtaining Elected Officials (2)
Positions Table
Districts Table
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Obtaining Elected Officials (3)
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QUESTIONS?
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