| 1930s_airphotos_21 | 1930's Digital Orthorectified Image of Clay County, Iowa, in MrSid Format | |
| 1930s_airphotos_22 | 1930's Digital Orthorectified Image of Clayton County, Iowa, in MrSid Format | |
| 1950s_airphotos_21 | 1950's Digital Orthorectified Image of Clay County, Iowa, in MrSid Format | |
| 1950s_airphotos_22 | 1950's Digital Orthorectified Image of Clayton County, Iowa, in MrSid Format | |
| 1960s_airphotos_21 | 1960's Digital Orthorectified Image of Clay County, Iowa, in MrSid Format | |
| 1960s_airphotos_22 | 1960's Digital Orthorectified Image of Clayton County, Iowa, in MrSid Format | |
| 1970s_airphotos_21 | 1970's Digital Orthorectified Image of Clay County Iowa | |
| 1970s_airphotos_22 | 1970's Digital Orthorectified Image of Clayton County Iowa | |
| 1980s_CIR_airphotos_21 | 1980's Digital Orthorectified Image of Clay County, Iowa, in MrSid Format | |
| 1980s_CIR_airphotos_22 | 1980's Digital Orthorectified Image of Clayton County, Iowa, in MrSid Format | |
Not Avail. |
1990s_airphotos_21 | 1990's Airphoto Mosaic for Clay County |
| 1990s_airphotos_22 | 1990's Airphoto Mosaic for Clayton County | |
| 2002_CIR_21 | 2002 Color-Infra-Red Airphoto Mosaic for Clay County | |
| 2002_CIR_22 | 2002 Color-Infra-Red Airphoto Mosaic for Clayton County | |
| 2004_NAIP_airphotos_21 | 2004 National Agriculture Imagery Program (NAIP) Aerial Photography for Clay County, Iowa | |
| 2004_NAIP_airphotos_22 | 2004 National Agriculture Imagery Program (NAIP) Aerial Photography for Clayton County, Iowa | |
| 2005_NAIP_airphotos_21 | 2005 National Agriculture Imagery Program (NAIP) Aerial Photography for Clay County, Iowa | |
| 2005_NAIP_airphotos_22 | 2005 National Agriculture Imagery Program (NAIP) Aerial Photography for Clayton County, Iowa | |
| 2006_NAIP_airphotos_21 | 2006 National Agriculture Imagery Program (NAIP) Aerial Photography of Clay County, Iowa | |
| 2006_NAIP_airphotos_22 | 2006 National Agriculture Imagery Program (NAIP) Aerial Photography of Clayton County, Iowa | |
| 2007_CIR_airphotos_21 | 2007 Two Foot Pixel, Color Infrared Orthophotography Mosaic of Clay County Iowa | |
| 2007_color_airphotos_21 | 2007 Two Foot Pixel, Color Orthophotography Mosaic of Clay County Iowa | |
| 2007_NAIP_airphotos_21 | 2007 National Agriculture Imagery Program (NAIP) Aerial Photography of Clay County, Iowa | |
| 2007_NAIP_airphotos_22 | 2007 National Agriculture Imagery Program (NAIP) Aerial Photography of Clayton County, Iowa | |
| 2008_NAIP_airphotos_21 | 2008 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Clay County, Iowa | |
| 2008_NAIP_airphotos_22 | 2008 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Clayton County, Iowa | |
| 2009_NAIP_airphotos_21 | 2009 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Clay County, Iowa | |
| 2009_NAIP_airphotos_22 | 2009 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Clayton County, Iowa | |
| 2010_CIR_airphotos_22 | 2010 Two Foot Pixel, Color Infrared Orthophotography Mosaic of Clayton County Iowa | |
| 2010_color_airphotos_22 | 2010 Two Foot Pixel, Color Orthophotography Mosaic of Clayton County Iowa | |
| 2010_NAIP_airphotos_21 | 2010 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Clay County, Iowa | |
| 2010_NAIP_airphotos_22 | 2010 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Clayton County, Iowa | |
| 2011_NAIP_airphotos_21 | 2011 National Agriculture Imagery Program (NAIP) Four-Band Aerial Photography of Clay County Iowa | |
| 2011_NAIP_airphotos_22 | 2011 National Agriculture Imagery Program (NAIP) Four-Band Aerial Photography of Clayton County Iowa | |
| Address_21 | Address Points of Clay County, Iowa | |
| andreas_atlas_21 | Georectified Image of Clay County from the Illustrated Historical Atlas of the State of Iowa, 1875, by A.T. Andreas | |
| andreas_atlas_22 | Georectified Image of Clayton County from the Illustrated Historical Atlas of the State of Iowa, 1875, by A.T. Andreas | |
| census_1990_21 | US Bureau of the Census, 1990 STF3a block level for Clay County, Iowa | |
| census_1990_22 | US Bureau of the Census, 1990 STF3a block level for Clayton County, Iowa | |
| census_2000_blocks_21 | Clay County Census 2000 Blocks | |
| census_2000_blocks_22 | Clayton County Census 2000 Blocks | |
| common_land_unit_21 | Common Land Unit for Clay County, Iowa | |
| common_land_unit_22 | Common Land Unit for ClaytonCounty, Iowa | |
| contours_2ft_21 | Generalized Two Foot Contours of Clay County Iowa Derived from Lidar Data | |
| contours_2ft_22 | Generalized Two Foot Contours of Clayton County Iowa Derived from Lidar Data | |
| DEM_3M_I_21 | Three Meter Digital Elevation Model of Clay County Iowa as an Imagine 16-bit Integer Raster | |
| DEM_3M_I_22 | Three Meter Digital Elevation Model of Clayton County Iowa as an Imagine 16-bit Integer Raster | |
| DOT_roadmap_21 | Iowa DOT Clay County Highway Transportation Map, 2005 | |
| DOT_roadmap_22 | Iowa DOT Clayton County Highway Transportation Map, 2005 | |
| drainage_district_tiles_21 | Drainage District Infrastructure of Clay County, Iowa | |
| drainage_districts_21 | Drainage Districts of Clay County, Iowa | |
| GLO_maps_21 | General Land Office (GLO) Maps of the State of Iowa, as Surveyed from 1836-59, Clay County | |
| GLO_maps_22 | General Land Office (GLO) Maps of the State of Iowa, as Surveyed from 1836-59, Clayton County | |
| GLO_vegetation_21 | Government Land Office Vegetation 1832-1859 for Clay County, Iowa | |
| GLO_vegetation_22 | Government Land Office Vegetation 1832-1859 for Clayton County, Iowa | |
| Hillshade_1M_21 | Hillshade of Clay County Iowa Derived from the LiDAR One Meter Digital Elevation Model | |
| Hillshade_1M_22 | Hillshade of Clayton County Iowa Derived from the LiDAR One Meter Digital Elevation Model | |
| NWI_21_line | National Wetlands Inventory data for Clay County, Iowa | |
| NWI_21_poly | National Wetlands Inventory data for Clay County, Iowa | |
| NWI_22_line | National Wetlands Inventory data for Clayton County, Iowa | |
| NWI_22_poly | National Wetlands Inventory data for Clayton County, Iowa | |
| NWI_remap_line_21 | National Wetland Inventory Remap and Update, Line Features, of Clay County, Iowa | |
| NWI_remap_line_22 | National Wetland Inventory Remap and Update, Line Features, of Cedar County, Iowa | |
| NWI_remap_poly_21 | National Wetland Inventory Remap and Update, Polygon Features, of Clay County, Iowa | |
| NWI_remap_poly_22 | National Wetland Inventory Remap and Update, Polygon Features, of Clayton County, Iowa | |
| PLSS_21 | Public Land Survey System for Clay County, Iowa | |
| PLSS_22 | Public Land Survey System for Clayton County, Iowa | |
| PLSS_QQQ_21 | Public Land Survey System, Quarter-Quarter-Quarter Sections, of Clay County Iowa | |
| PLSS_QQQ_22 | Public Land Survey System, Quarter-Quarter-Quarter Sections, of Clayton County Iowa | |
| rivers_21 | Rivers of Clay County | |
| rivers_22 | Rivers of Clayton County | |
| roads_2006_21 | Road Centerlines of Clay County, Iowa, 2006, from Iowa DOT GIMS files | |
| roads_2006_22 | Road Centerlines of Clayton County, Iowa, 2006, from Iowa DOT GIMS files | |
| soils_21 | Iowa Cooperative Soil Survey (ICSS) Digital Soil Data for Clay County | |
| soils_22 | Iowa Cooperative Soil Survey (ICSS) Digital Soil Data for Clayton County | |
| soils_giard | Iowa Cooperative Soil Survey (ICSS) Digital Soil Data for Clayton County, Giard Purchase | |
| spot_21 | Digital spot data for Clay County, Iowa | |
| spot_22 | Digital spot data for Clayton County, Iowa | |
| ssurgo_line_21 | Soil Survey Geographic (SSURGO) Database for Clay County | |
| ssurgo_line_22 | Soil Survey Geographic (SSURGO) Database for Clayton County, Iowa | |
| ssurgo_soil_21 | Soil Survey Geographic (SSURGO) Database for Clay County | |
| ssurgo_soil_22 | Soil Survey Geographic (SSURGO) Database for Clayton County, Iowa | |
| ssurgo_spot_21 | Soil Survey Geographic (SSURGO) Database for Clay County | |
| ssurgo_spot_22 | Soil Survey Geographic (SSURGO) Database for Clayton County, Iowa | |
| Structures_21 | Structures of Clay County, Iowa | |
| surficial_geology_21 | Surficial Geology of Clay County Iowa | |
| USGS_quads_21 | USGS 7.5' Quad Mosaic for Clay County | |
| USGS_quads_22 | USGS 7.5' Quad Mosaic for Clayton County |