ortho/ortho_2016_2018_nc

LiDAR derivitives from the 2018-20 LiDAR project. Download of a county-wide basis, includes two-foot contours, one-meter digital elevation model (DEM), and one-meter hillshade (shaded relief).

This site provides free access to Iowa geographic map data, including aerial photography, orthophotos, elevation maps, and historical maps. The data is available through an on-line map viewer and through Web Map Service (WMS) connections for GIS. The site was developed by the Iowa State University Geographic Information Systems Support and Research Facility in cooperation with the Iowa Department of Natural Resources, the USDA Natural Resources Conservation Service, and the Massachusetts Institute of Technology. This site was first launched in March 1999.

description: The purpose of the IGDC is to help users find GIS data for the state of Iowa. The site is a cooperative effort between the Iowa Geographic Information Council and local, state, federal and other GIS data producers in Iowa. Users may search by location or topic for available data, many of which have links to where data can be directly downloaded. Data producers are encouraged to register for an account and publish metadata for their GIS data collections so the public can easily find it. The site is maintained by the Iowa State University's GIS Support and Research Facility.; abstract: The purpose of the IGDC is to help users find GIS data for the state of Iowa. The site is a cooperative effort between the Iowa Geographic Information Council and local, state, federal and other GIS data producers in Iowa. Users may search by location or topic for available data, many of which have links to where data can be directly downloaded. Data producers are encouraged to register for an account and publish metadata for their GIS data collections so the public can easily find it. The site is maintained by the Iowa State University's GIS Support and Research Facility.

The Natural Resources Geographic Information System (NRGIS) Library is a Geographic Information System (GIS) repository developed and maintained by the GIS Section of the Iowa Department of Natural Resources (DNR). It is a collection of more than 20,000 geographically referenced databases. The purpose of the NRGIS Library is to improve the availability, integration, and analysis of natural resource information and improve decisions to carry out agency responsibilities related to the management, protection and development of Iowa's natural resources. The NRGIS Library is seen as a one-stop repository for all of Iowa's natural resource, geographic information.

This shapefile was derived from a predecessor coverage named "IN_LANDSURVEY." IN_LANDSURVEY is a digital representation of land survey features as represented on the USGS 1:24,000 digital raster graphic (DRG) series. ESRI ArcEdit 8.1 and ESRI ArcView 3.2 were used to extract the following shapefiles from IN_LANDSURVEY: LANDSURVEY_COUNTY_LINE_IN, LANDSURVEY_COUNTY_POLY_IN, LANDSURVEY_SECTIONS_LINE_IN, LANDSURVEY_SECTIONS_POLY_IN, LANDSURVEY_STATE_LINE_IN, LANDSURVEY_STATE_POLY_IN, LANDSURVEY_TOWNSHIPS_LINE_IN, and LANDSURVEY_TOWNSHIPS_POLY_IN.NOTE -- This shapefile is identical to a version named "INDIANA_STATEBDY_24K_IGS_L". This metadata file is a copy of the metadata for "INDIANA_STATEBDY_24K_IGS_L" that has had minor edits. The shapefile and metadata were renamed to conform to a file-naming convention for a project funded outside the IGS.

From the U.S. Census Tiger/Line 2019 Technical Documentation (https://www2.census.gov/geo/pdfs/maps-data/data/tiger/tgrshp2019/TGRSHP2019_TechDoc.pdf page 3-62): States and equivalent entities are the primary governmental divisions of the United States. In addition to the fifty states, the Census Bureau treats the District of Columbia, Puerto Rico, and the Island areas (American Samoa, the Commonwealth of the Northern Mariana Islands, Guam, and the U.S. Virgin Islands) as statistical equivalents of states for the purpose of data presentation. Census regions and divisions consist of groupings of states and equivalent entities. Region and division codes are included in the state shapefiles and users can merge state records to form those areas.

(In progress)1930s: This imagery is provided through a project funded by the Iowa DNR in cooperation with the ISU GIS Facility, and USDA Natural Resources Conservation Service. These aerial photos were acquired by the US Department of Agriculture from 1936-1941.1950s: This imagery is provided through a project funded by the Iowa DNR in cooperation with the ISU GIS Facility, and USDA Natural Resources Conservation Service. These aerial photos were acquired by the US Department of Agriculture in the 1950s.1960s: This imagery is provided through a project funded by the Iowa DNR in cooperation with the ISU GIS Facility, and USDA Natural Resources Conservation Service. These aerial photos were acquired by the US Department of Agriculture in the 1960s.1970s: This imagery is provided through a project funded by the Iowa DNR in cooperation with the Iowa USDA Natural Resources Conservation Service, and ISU GIS Facility. The source aerial photos for this map service were acquired by the US Department of Agriculture from May 1967 to October 1974.1980s: This imagery is provided through a project funded by the Iowa DNR in cooperation with the ISU GIS Facility. The source aerial photos for this map service were acquired by the National High Altitude Program (NHAP) from May 1981 to August 1986.1990s: Digital Orthophoto Quads (DOQs) are aerial photos in which displacements caused by camera orientation and terrain have been removed. DOQs combine the image characteristics of a photograph with the geometric qualities of a map. The DOQs on this site are from aerial photos taken from 1990-2000 through the US Geological Survey.

This coverage contains points that represent populated places, ie. cities, towns, villages or any other named place where people live. The coverage was developed from the USGS Geographic Names Information System (GNIS) database for Iowa. There were many errors in the original GNIS data, including missing points or mislocated points. The GNIS points were compared to two reference sources: USGS 100k scale county maps and Iowa DOT county highway maps. Mislocated and missing point were fixed and each town was designated as having been verified from one or the other reference sources or both. Some GNIS points were not verified from either source and are so designated (use these with caution).

The regions onThis map represent areas with similar hydrogeologic characteristics thought to represent similar potentials for contamination of groundwater and/or water wells. The map was created from an unprecedented compilation and interpretation of primary geologic and soil data; compilation of interim Arc/Info coverages of bedrock aquifers/aquitards, thickness of Quaternary deposits, alluvial aquifers, sinkholes (centers of 400 meter radius circles), and agricultural drainage wells (centers of 400 meter radius circles); overlay techniques; and evaluation of groundwater contamination and well contamination data. This coverage is published in 1991 as the 1:500,000 scale, color map: Groundwater Vulnerability Regions of Iowa.

Geospatial data about Polk County, Iowa State Senate Districts. Export to CAD, GIS, PDF, CSV and access via API.

Geospatial data about Polk County, Iowa State House Districts. Export to CAD, GIS, PDF, CSV and access via API.

Vector map of specific vegetation types and percent cover for Reynolds Creek Experimental Watershed (RCEW). Field mapping was done on color aerial photographs at 1:12,000 and transferred to 1:24000 base maps. These were hand digitized at the NWRC. Contains 90 different vegetation mapping units. See Geographic Database: Reynolds Creek Experimental Watershed, Idaho, USA, in Water Resources Research by Seyfried, Harris, Marks and Jacob for more information.

Outfalls which discharge wastewater from wastewater treatment facilities with individual NPDES permits. It does not include NPDES general permits.

Annual mean of daily minimum and maximum temperature from the DAYMET dataset for Idaho. These data were prepared by the ISU GIS TREC to support the NSF EPSCoR I-CREWS study https://www.idahoepscor.org/i-crews. Original source data provided in NetCDF format (*.NC). These data were imported using Idrisi Terrset and converted into individual daily raster TIF layers to support all modern GIS software. The entire dataset was then clipped to the I-CREWS study area, designated as all HUC08 watersheds intersecting the state of Idaho.

This is a multidimensional dataset stored in cloud raster format (CRF)

A landscape is a collection of land shapes or land forms. Landform regions are a grouping of individual landscape features that have a common geomophology. In Iowa, these regions are composed of earth materials derived from glacial, wind, river, and marine environments of the geologic past. This is a new representation of the landform regions of Iowa, at a scale of 1:24,000, and derived from a variety of sources including soils, slope maps, topographic maps

This file contains locations of confinement feeding operations that are known by the Iowa DNR.

Geospatial data about Hamilton County, Indiana State Highways. Export to CAD, GIS, PDF, CSV and access via API.

This imagery is provided through a project funded by the Iowa DNR in cooperation with the ISU GIS Facility, and USDA Natural Resources Conservation Service. These aerial photos were acquired by the US Department of Agriculture from 1936-1941.