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2008 West Virginia GIS Conference Creating a Statewide Geocoding Service for West Virginia 2008 West Virginia GIS Conference Creating a Statewide Geocoding Service for West Virginia

What is Geocoding? Geocoding is the process used to assign a spatial location to 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

How Does it Work? Different geocoding engines use different methods. There are two approaches 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. Lee St Mailing Address: 708 Sites Ln Moorefield, WV 26836 Moorefield Sprin g Ave Site s La ne

How Does it Work? Attribute matching: using part of the address or a combination 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. Lee St Mailing Address: 708 Sites Ln Moorefield, WV 26836 Moorefield, Moorefield Sprin g Ave Site s La ne

St How Does it Work? Attribute Matching: Data Entry Integrity Check. Is there… > St How Does it Work? Attribute Matching: Data Entry Integrity Check. Is there… > Moorfield in West Virginia? > Yes >Does Zipcode 26836 match Moorfield, WV ? Yes > Is there a Sites Lane within that Zipcode? (range match)> Does the Address Number fall in the Range? Lee Mailing Address: 708 Sites Ln WV 26836 Moorefield, 26836 Sprin g Ave Site s La ne

How Does it Work? Range Matching: Geocoding using acute, attribute rich GIS data. I. How Does it Work? Range Matching: Geocoding using acute, attribute rich GIS data. I. E. Mailing Address: 708 Sites Ln 108 Moorefield, WV 26836 You get: 78` 57’ 15” W 39` 4’ 13” N

How Does it Work? Attributed Street Data: Mailing Address: 708 Sites Ln Moorefield, WV How Does it Work? Attributed Street Data: Mailing Address: 708 Sites Ln Moorefield, WV 26836 Name City Zip Prefix Suffix L From Site Moorfield 26836 Lane L To R From R To Street ID 101 119 102 120 23948 121 199 122 198 23948

How Does it Work? Direct Matching: Geocoding using attributed point locations. Mailing Address: 708 How Does it Work? Direct Matching: Geocoding using attributed point locations. Mailing Address: 708 Sites Ln 108 Moorefield, WV 26836 You get: 78` 57’ 15” W 39` 4’ 13” N

Who Uses Geocoding? Almost EVERYONE! General Public – Driving Directions, Maps, Site location, GIS Who Uses Geocoding? Almost EVERYONE! General Public – Driving Directions, Maps, Site location, GIS Data Input, etc… Other State Geocoding Programs: Ohio, Oregon, Texas, more… What is Geocoding? Agencies Interested: State Tax, State Historical and Preservation Office, others?

Why can’t we use the free one? Private Industry: Good: Autonomously Maintained Reference Dataset Why can’t 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

Why can’t we use the free one? Even when it’s right, it’s still wrong. Why can’t we use the free one? Even when it’s right, it’s still wrong.

Why can’t we use the free one? West Virginia Data: Good: Higher Accuracy Lower Why can’t 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!!!

How Does it Work? Direct Matching: Geocoding using attributed point locations. Mailing Address: 708 How Does it Work? Direct Matching: Geocoding using attributed point locations. Mailing Address: 708 Sites Ln 108 Moorefield, WV 26836 You get: 78` 57’ 15” W 39` 4’ 13” N

www. batchgeocode. com www. batchgeocode. com

2008 West Virginia GIS Conference Questions? Kevin. Kuhn@mail. wvu. edu WV GIS Technical Center 2008 West Virginia GIS Conference Questions? Kevin. [email protected] wvu. edu WV GIS Technical Center