| 1930s_airphotos_46 | 1930's Digital Orthorectified Image of Humboldt County, Iowa, in MrSid Format | |
| 1950s_airphotos_46 | 1950's Digital Orthorectified Image of Humboldt County, Iowa, in MrSid Format | |
| 1960s_airphotos_46 | 1960's Digital Orthorectified Image of Humboldt County, Iowa, in MrSid Format | |
| 1970s_airphotos_46 | 1970's Digital Orthorectified Image of Humboldt County Iowa | |
| 1980s_CIR_airphotos_46 | 1980's Digital Orthorectified Image of Humboldt County, Iowa, in MrSid Format | |
| 1990s_airphotos_46 | 1990's Airphoto Mosaic for Humboldt County | |
| 2002_CIR_46 | 2002 Color-Infra-Red Airphoto Mosaic for Humboldt County | |
| 2004_NAIP_airphotos_46 | 2004 National Agriculture Imagery Program (NAIP) Aerial Photography for Humboldt County, Iowa | |
| 2005_NAIP_airphotos_46 | 2005 National Agriculture Imagery Program (NAIP) Aerial Photography for Humboldt County, Iowa | |
| 2006_NAIP_airphotos_46 | 2006 National Agriculture Imagery Program (NAIP) Aerial Photography of Humboldt County, Iowa | |
| 2007_CIR_airphotos_46 | 2007 Two Foot Pixel, Color Infrared Orthophotography Mosaic of Humboldt County Iowa | |
| 2007_color_airphotos_46 | 2007 Two Foot Pixel, Color Orthophotography Mosaic of Humboldt County Iowa | |
| 2007_NAIP_airphotos_46 | 2007 National Agriculture Imagery Program (NAIP) Aerial Photography of Humboldt County, Iowa | |
| 2008_NAIP_airphotos_46 | 2008 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Humboldt County, Iowa | |
| 2009_NAIP_airphotos_46 | 2009 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Humboldt County, Iowa | |
| 2010_NAIP_airphotos_46 | 2010 National Agriculture Imagery Program (NAIP) Aerial Photography Mosaic of Humboldt County, Iowa | |
| 2011_NAIP_airphotos_46 | 2011 National Agriculture Imagery Program (NAIP) Four-Band Aerial Photography of Humboldt County Iowa | |
| Address_46 | Address Points of Humboldt County, Iowa | |
| andreas_atlas_46 | Georectified Image of Humboldt County from the Illustrated Historical Atlas of the State of Iowa, 1875, by A.T. Andreas | |
| census_1990_46 | US Bureau of the Census, 1990 STF3a block level for Humboldt County, Iowa | |
| census_2000_blocks_46 | Humboldt County Census 2000 Blocks | |
| common_land_unit_46 | Common Land Unit for HumboldtCounty, Iowa | |
| contours_2ft_46 | Generalized Two Foot Contours of Humboldt County Iowa Derived from Lidar Data | |
| DEM_3M_I_46 | Three Meter Digital Elevation Model of Humboldt County Iowa as an Imagine 16-bit Integer Raster | |
| DOT_roadmap_46 | Iowa DOT Humboldt County Highway Transportation Map, 2005 | |
| drainage_district_tiles_46 | Drainage District Infrastructure of Humboldt County, Iowa | |
| drainage_districts_46 | Drainage Districts of Humboldt County, Iowa | |
| GLO_maps_46 | General Land Office (GLO) Maps of the State of Iowa, as Surveyed from 1836-59, Humboldt County | |
| GLO_vegetation_46 | Government Land Office Vegetation 1832-1859 for Humboldt County, Iowa | |
| Hillshade_1M_46 | Hillshade of Humboldt County Iowa Derived from the LiDAR One Meter Digital Elevation Model | |
| NWI_46_line | National Wetlands Inventory data for Humboldt County, Iowa | |
| NWI_46_poly | National Wetlands Inventory data for Humboldt County, Iowa | |
| NWI_remap_line_46 | National Wetland Inventory Remap and Update, Line Features, of Humboldt County, Iowa | |
| NWI_remap_poly_46 | National Wetland Inventory Remap and Update, Polygon Features, of Humboldt County, Iowa | |
| PLSS_46 | Public Land Survey System for Humboldt County, Iowa | |
| PLSS_QQQ_46 | Public Land Survey System, Quarter-Quarter-Quarter Sections, of Humboldt County Iowa | |
| rivers_46 | Rivers of Humboldt County | |
| roads_2006_46 | Road Centerlines of Humboldt County, Iowa, 2006, from Iowa DOT GIMS files | |
| ssurgo_line_46 | Soil Survey Geographic (SSURGO) Database for Humboldt County, Iowa | |
| ssurgo_soil_46 | Soil Survey Geographic (SSURGO) Database for Humboldt County, Iowa | |
| ssurgo_spot_46 | Soil Survey Geographic (SSURGO) Database for Humboldt County, Iowa | |
| ssurgo_streams_46 | Soil Survey Geographic (SSURGO) Database for Humboldt County, Iowa | |
| Structures_46 | Structures of Humboldt County, Iowa | |
| surficial_geology_46 | Surficial Geology of Humboldt County Iowa | |
| USGS_quads_46 | USGS 7.5' Quad Mosaic for Humboldt County |