Geographic Information System
Defiance County has a variety of data layers available including:
1"=100' aerial photography taken April 2002 available in Geo Tif files (45 Gb for countywide)
and MrSid (550 Mb for countywide) A MrSid viewer can be downloaded at www.lizardtech.com
1"=200' aerial photography taken April 1997 is also available in Geo Tif
Contact us for a CD of an area of interest. CD's are $15 each.
A zipped ESRI shapefile containing Defiance County's parcel basemap combined with limited fields
from the Defiance County Auditor's Information is available by download (file created 12/15/2010) 8 Mb.
Additional data can be viewed on the Auditor's website.
Visit ESRI's website to download a free viewer. Another free viewer which can display both MrSID and shapefiles is avialable from DDTI.
PUCO has a wide variety of data available for download including utility districts, school districts
topographic maps, roads, railroads, etc.
OGRIP is another state agency involved in distributing GIS data.
All of Defiance County's GIS data is projected in Ohio State Plane North, NAD 83, units are in feet