Creating a Statewide Geocoding Service for West Virginia

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Creating a Statewide Geocoding Service for West
Virginia
2008 West Virginia GIS Conference
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What is Geocoding? Geocoding is the process
used to assign a spatial location to a standard
street address. Geocoder /Geocoding Engine /
Single Entry / Batch
You type in 708 Sites Ln Moorefield, WV 26836
You get 708 Sites Lane Moorefield, WV 26836 78
57 15 W 39 4 13 N
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How Does it Work? Different geocoding engines
use different methods. There are two approaches
of geocoding an address attribute matching and
range matching. Many use a combination of both
methods.
Mailing Address 708 Sites Ln Moorefield, WV 26836
Lee St
Moorefield
Spring Ave
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How Does it Work? Attribute matching using part
of the address or a combination of parts that
match the entry to the database. Ex. Postal
Location.
Mailing Address 708 Sites Ln Moorefield, WV
26836
Moorefield,
Lee St
Moorefield
Spring Ave
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How Does it Work? Attribute Matching Data Entry
Integrity Check. Is there gt Moorfield in West
Virginia? gt Yes gtDoes Zipcode 26836 match
Moorfield, WV ? Yes gt Is there a Sites Lane
within that Zipcode? (range match)gt Does the
Address Number fall in the Range?
Lee St
26836
Spring Ave
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How Does it Work? Range Matching Geocoding
using acute, attribute rich GIS data. I.E.
Mailing Address 708 Sites Ln Moorefield, WV 26836
108 Sites Ln
You get 78 57 15 W 39 4 13 N
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How Does it Work? Attributed Street Data
Mailing Address 708 Sites Ln Moorefield, WV 26836
Name City Zip Prefix Suffix L From L To R From R To Street ID
Site Moorfield 26836 Lane 101 119 102 120 23948
Site Moorfield 26836 Lane 121 199 122 198 23948
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How Does it Work? Direct Matching Geocoding
using attributed point locations.
Mailing Address 708 Sites Ln Moorefield, WV 26836
108 Sites Ln
You get 78 57 15 W 39 4 13 N
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Who Uses Geocoding? Almost EVERYONE! General
Public Driving Directions, Maps, Site location,
GIS Data Input, etc Other State Geocoding
Programs Ohio, Oregon, Texas, more Agencies
Interested State Tax, State Historical and
Preservation Office, others?
What is Geocoding?
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Why cant we use the free one?
Private Industry Good Autonomously Maintained
Reference Dataset Ready-built Generally
Current in Urban Areas Bad Reoccurring
Costs Data Integrity / Data Coverage Poor
Rural Coverage Licensing Restrictions No
coverage for RR addresses
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Why cant we use the free one?
Even when its right, its still wrong.
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Why cant we use the free one?
West Virginia Data Good Higher
Accuracy Lower Overall Cost Distributed
Benefits Long Term Stability Potential
Greater Accuracy No Licensing Restrictions
(Increase of Use) Bad Startup Buy
In Incomplete Data!!!
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How Does it Work? Direct Matching Geocoding
using attributed point locations.
Mailing Address 708 Sites Ln Moorefield, WV 26836
108 Sites Ln
You get 78 57 15 W 39 4 13 N
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• www.batchgeocode.com

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Questions? Kevin.Kuhn_at_mail.wvu.eduWV GIS
Technical Center
2008 West Virginia GIS Conference