1930s_airphotos_31	1930's Digital Georectified Image of Dubuque County, Iowa, in MrSid Format
	1950s_airphotos_31	1950's Digital Orthorectified Image of Dubuque County, Iowa, in MrSid Format
	1960s_airphotos_31	1960's Digital Orthorectified Image of Dubuque County, Iowa, in MrSid Format
	1970s_airphotos_31	1970's Digital Orthorectified Image of Dubuque County Iowa
	1980s_CIR_airphotos_31	1980's Digital Orthorectified Image of Dubuque County, Iowa, in MrSid Format
	1990s_airphotos_31	1990's Airphoto Mosaic for Dubuque County
	2002_CIR_31	2002 Color-Infra-Red Airphoto Mosaic for Dubuque County
	2004_NAIP_airphotos_31	2004 National Agriculture Imagery Program (NAIP) Aerial Photography for Dubuque County, Iowa
	2005_NAIP_airphotos_31	2005 National Agriculture Imagery Program (NAIP) Aerial Photography for Dubuque County, Iowa
	2006_NAIP_airphotos_31	2006 National Agriculture Imagery Program (NAIP) Aerial Photography of Dubuque County, Iowa
	2007_NAIP_airphotos_31	2007 National Agriculture Imagery Program (NAIP) Aerial Photography of Dubuque County, Iowa
	2008_NAIP_airphotos_31	2008 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Dubuque County, Iowa
	2009_NAIP_airphotos_31	2009 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Dubuque County, Iowa
	2010_CIR_airphotos_31	2010 Two Foot Pixel, Color Infrared Orthophotography Mosaic of Dubuque County Iowa
	2010_color_airphotos_31	2010 Two Foot Pixel, Color Orthophotography Mosaic of Dubuque County Iowa
	2010_NAIP_airphotos_31	2010 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Dubuque County, Iowa
	2011_NAIP_airphotos_31	2011 National Agriculture Imagery Program (NAIP) Four-Band Aerial Photography of Dubuque County Iowa
	andreas_atlas_31	Georectified Image of Dubuque County from the Illustrated Historical Atlas of the State of Iowa, 1875, by A.T. Andreas
	census_1990_31	US Bureau of the Census, 1990 STF3a block level for DubuqueCounty, Iowa
	census_2000_blocks_31	Dubuque County Census 2000 Blocks
	common_land_unit_31	Common Land Unit for Dubuque County, Iowa
	contours_2ft_31	Generalized Two Foot Contours of Dubuque County Iowa Derived from Lidar Data
	DEM_3M_I_31	Three Meter Digital Elevation Model of Dubuque County Iowa as an Imagine 16-bit Integer Raster
	DOT_roadmap_31	Iowa DOT Dubuque County Highway Transportation Map, 2005
	GLO_maps_31	General Land Office (GLO) Maps of the State of Iowa, as Surveyed from 1836-59, Dubuque County
	GLO_vegetation_31	Government Land Office Vegetation 1832-1859 for Dubuque County, Iowa
	Hillshade_1M_31	Hillshade of Dubuque County Iowa Derived from the LiDAR One Meter Digital Elevation Model
	NWI_31_line	National Wetlands Inventory data for Dubuque County, Iowa
	NWI_31_poly	National Wetlands Inventory data for Dubuque County, Iowa
	NWI_remap_line_31	National Wetland Inventory Remap and Update, Line Features, of Dubuque County, Iowa
	NWI_remap_poly_31	National Wetland Inventory Remap and Update, Polygon Features, of Dubuque County, Iowa
	PLSS_31	Public Land Survey System for Dubuque County, Iowa
	PLSS_QQQ_31	Public Land Survey System, Quarter-Quarter-Quarter Sections, of Dubuque County Iowa
	rivers_31	Rivers of Dubuque County
	roads_2006_31	Road Centerlines of Dubuque County, Iowa, 2006, from Iowa DOT GIMS files
	soils_31	Iowa Cooperative Soil Survey (ICSS) Digital Soil Data for Dubuque County
	spot_31	Digital spot data for Dubuque County, Iowa
	ssurgo_line_31	Soil Survey Geographic (SSURGO) Database attached with the Iowa Soil Properties and Interpretations Database (ISPAID) for Dubuque County, Iowa
	ssurgo_soil_31	Soil Survey Geographic (SSURGO) Database attached with the Iowa Soil Properties and Interpretations Database (ISPAID) for Dubuque County, Iowa
	ssurgo_spot_31	Soil Survey Geographic (SSURGO) Database attached with the Iowa Soil Properties and Interpretations Database (ISPAID) for Dubuque County, Iowa
	USGS_quads_31	USGS 7.5' Quad Mosaic for Dubuque County