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Welcome to Delaware County's GIS Website

Delaware Appraisal Land Information System (DALIS) Project was established in 1994 by the Delaware County Auditor. Since then, the division has become the recipient of numerous international, national, and local awards for its exemplary and innovative use of GIS technology in property taxation as well as many other applications.

DALIS Project’s team of six full time and two part time GIS professionals are responsible for creating and maintaining the county’s comprehensive GIS dataset consisting of over 70 data layers including but not limited to parcels, road centerline and right of ways, political boundaries such as townships, municipalities, schools, tax districts, various land marks, rail roads, and voting precincts.

Since its inception, DALIS Project’s rich datasets are used by a variety of county and city jurisdictions and in numerous applications such as: appraisal, planning, economic development, E-911, board of elections, code compliance, utilities, engineering, water & waste water mapping to name a few. DALIS staff assists many of these departments with their GIS needs and with developing a variety of cutting edge applications.
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DALIS Web is the division’s latest creation and since July 15th, 2005 when the application went live, it has received over half a million hits per month! This application is based on ArcIMS and .NET technology and was developed in-house. It includes over 50 data layers and has many new features such as custom searches, census information, and access to many different recorded documents.
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Latest News:

January 2017: NEW -- Delaware County Election Results -- NEW

December 2016: Delaware County Sex Offender Locator

November 2016: DALIS Project's team celebrated GIS Day 2006 with Dempsey Middle School. Read more...

September 2016: DALIS Project's Delaware County Annexation Map won the 2nd place award for the Best Communicative Map at the 16th Ohio GIS Conference.

August 2016: DALIS Web - our IMS application was featured at the planary session of ESRI User Conference in front of +/- 14,000 GIS professionals.

July 2016: DALIS Project's GIS was featured at the National Public Radio (NPR)'s "All Things Considered". Read more...

May 2016: DALIS Web - our IMS application was featured on the Geography Network. Geography Network is a global network of geographic information users and providers. Read more.....

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Delaware, Ohio 43015. (740) 833-2070.
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