Parcel Data:
Our parcel data and other layers available for download at the Iowa GIS Data Repository. That link is: https://www.iowagisdata.org 
. You must register with an account and password but data is free to download from us. Note that other counties use this site to redistribute their GIS data. Some counties charge for data, but Scott County does not.
Feel free to contact us if you have any questions about the data or accessing it through the repository.
County and Municipal Data Sources:
- Iowa Land Records
http://iowalandrecords.org/portal/
Links to county/city land records - Ramona GIS Inventory
http://gisinventory.net
Info on GIS activity in Iowa cities/counties
County Examples:
- Rock Island County, Illinois
http://www.co.rock-island.il.us/GIS.aspx?id=116
Rock Island County GIS
General Interest:
- Google Earth
http://earth.google.com
Worldwide navigable aerials – download required - Library of Congress Geography and Map Reading Room
http://www.loc.gov/rr/geogmap/
Variety of new and historic maps. - The Degree Confluence Project
http://www.confluence.org
Photos from all latitude/longitude intersections! - Windows local live
http://local.live.com
Base maps and select birds eye oblique aerials
Introduction to GIS:
- GIS.com
http://www.gis.com
ESRI’s guide to GIS
National/Regional Data Sites:
- Corps of Engineers NIC
http://www.mvr.usace.army.mil/Missions/Navigation/Navigation-Charts/Upper-Mississippi-River/ - FEMA Map Service Center
https://msc.fema.gov
Flood Maps and more - National Geodetic Survey
http://www.ngs.noaa.gov
Access NGS monuments and more - Topozone
http://www.topozone.com
Online Topographic Maps - Upper Midwest Environmental Sciences Center Data Library
http://www.umesc.usgs.gov/data_library.html
Data on Mississippi River and adjacent areas - US Fish and Wildlife Department
http://www.fws.gov/data/
Environmental data, wetlands and more. - USDA Data Gateway
http://datagateway.nrcs.usda.gov
Orthos, Soils, watersheds and more. - USGS
http://www.usgs.gov
Main page for the U.S. Geological Survey - USGS National Elevation Dataset
http://ned.usgs.gov
Seamless elevation data for the U.S. - USGS National Map
http://nationalmap.gov
Wide assortment of data and maps.
Organizations:
- Iowa Geographic Information Counsel (IGIC)
http://www.iowagic.org
Iowa State - Urban and Regional Information Systems Association (URISA)
http://www.urisa.org
National Technology User Group
State of Iowa Mapping Data Sources:
- Iowa Cooperative Soil SurveyState Soils data (ISPAID and SSURGO)
- Iowa DNR Library
http://www.igsb.uiowa.edu/nrgislibx/
Variety of natural resources data - Iowa DOT GIS data
http://www.iowadot.gov/gis/
GIS dataset downloads from IADOT - Iowa Environmental Mesonet (IEM)
http://mesonet.agron.iastate.edu/GIS/
GIS weather data and related for Iowa - Iowa Geographic Map Server
http://ortho.gis.iastate.edu
Iowa aerial photos and more - State Data Center
http://www.silo.lib.ia.us/specialized-services/datacenter/
Good site for Iowa demographics