Geospatial data about Polk County, Iowa City and Township Boundaries. Export to CAD, GIS, PDF, CSV and access via API.

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The TIGER/Line shapefiles include both incorporated places (legal entities) and census designated places or CDPs (statistical entities). An incorporated place is established to provide governmental functions for a concentration of people as opposed to a minor civil division (MCD), which generally is created to provide services or administer an area without regard, necessarily, to population. Places always nest within a state, but may extend across county and county subdivision boundaries. An incorporated place usually is a city, town, village, or borough, but can have other legal descriptions. CDPs are delineated for the decennial census as the statistical counterparts of incorporated places. CDPs are delineated to provide data for settled concentrations of population that are identifiable by name, but are not legally incorporated under the laws of the state in which they are located. The boundaries for CDPs often are defined in partnership with state, local, and/or tribal officials and usually coincide with visible features or the boundary of an adjacent incorporated place or another legal entity. CDP boundaries often change from one decennial census to the next with changes in the settlement pattern and development; a CDP with the same name as in an earlier census does not necessarily have the same boundary. The only population/housing size requirement for CDPs is that they must contain some housing and population. The boundaries of most incorporated places in this shapefile are as of January 1, 2021, as reported through the Census Bureau's Boundary and Annexation Survey (BAS). The boundaries of all CDPs were delineated as part of the Census Bureau's Participant Statistical Areas Program (PSAP) for the 2020 Census.

City and county boundaries within Scott County, Iowa.

Downloadable H&T PDF City and County Maps.

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 2015 cartographic boundary shapefiles are simplified representations of selected geographic areas from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). These boundary files are specifically designed for small-scale thematic mapping. When possible, generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based files while others are available only as state-based files. The records in this file allow users to map the parts of Urban Areas that overlap a particular county. After each decennial census, the Census Bureau delineates urban areas that represent densely developed territory, encompassing residential, commercial, and other nonresidential urban land uses. In general, this territory consists of areas of high population density and urban land use resulting in a representation of the "urban footprint." There are two types of urban areas: urbanized areas (UAs) that contain 50,000 or more people and urban clusters (UCs) that contain at least 2,500 people, but fewer than 50,000 people (except in the U.S. Virgin Islands and Guam which each contain urban clusters with populations greater than 50,000). Each urban area is identified by a 5-character numeric census code that may contain leading zeroes. The primary legal divisions of most states are termed counties. In Louisiana, these divisions are known as parishes. In Alaska, which has no counties, the equivalent entities are the organized boroughs, city and boroughs, municipalities, and for the unorganized area, census areas. The latter are delineated cooperatively for statistical purposes by the State of Alaska and the Census Bureau. In four states (Maryland, Missouri, Nevada, and Virginia), there are one or more incorporated places that are independent of any county organization and thus constitute primary divisions of their states. These incorporated places are known as independent cities and are treated as equivalent entities for purposes of data presentation. The District of Columbia and Guam have no primary divisions, and each area is considered an equivalent entity for purposes of data presentation. The Census Bureau treats the following entities as equivalents of counties for purposes of data presentation: Municipios in Puerto Rico, Districts and Islands in American Samoa, Municipalities in the Commonwealth of the Northern Mariana Islands, and Islands in the U.S. Virgin Islands. The entire area of the United States, Puerto Rico, and the Island Areas is covered by counties or equivalent entities. The boundaries for counties and equivalent entities are as of January 1, 2010.

A dataset listing Iowa cities by population for 2024.

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).

A dataset listing Iowa counties by population for 2024.

The 2019 cartographic boundary KMLs are simplified representations of selected geographic areas from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). These boundary files are specifically designed for small-scale thematic mapping. When possible, generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based files while others are available only as state-based files. The records in this file allow users to map the parts of Urban Areas that overlap a particular county. After each decennial census, the Census Bureau delineates urban areas that represent densely developed territory, encompassing residential, commercial, and other nonresidential urban land uses. In general, this territory consists of areas of high population density and urban land use resulting in a representation of the ""urban footprint."" There are two types of urban areas: urbanized areas (UAs) that contain 50,000 or more people and urban clusters (UCs) that contain at least 2,500 people, but fewer than 50,000 people (except in the U.S. Virgin Islands and Guam which each contain urban clusters with populations greater than 50,000). Each urban area is identified by a 5-character numeric census code that may contain leading zeroes. The primary legal divisions of most states are termed counties. In Louisiana, these divisions are known as parishes. In Alaska, which has no counties, the equivalent entities are the organized boroughs, city and boroughs, municipalities, and for the unorganized area, census areas. The latter are delineated cooperatively for statistical purposes by the State of Alaska and the Census Bureau. In four states (Maryland, Missouri, Nevada, and Virginia), there are one or more incorporated places that are independent of any county organization and thus constitute primary divisions of their states. These incorporated places are known as independent cities and are treated as equivalent entities for purposes of data presentation. The District of Columbia and Guam have no primary divisions, and each area is considered an equivalent entity for purposes of data presentation. The Census Bureau treats the following entities as equivalents of counties for purposes of data presentation: Municipios in Puerto Rico, Districts and Islands in American Samoa, Municipalities in the Commonwealth of the Northern Mariana Islands, and Islands in the U.S. Virgin Islands. The entire area of the United States, Puerto Rico, and the Island Areas is covered by counties or equivalent entities. The generalized boundaries for counties and equivalent entities are as of January 1, 2010.

Note: This is a subset of the Right of Way Acquisition View to serve out only Permanent Easement Right of Way for city, county, utility and railroad parcels.

description: Displays all non-restricted local road segments in the state of Iowa. Specific route information is only available once zoomed into the county level. County restriction map can be found here: http://www.iowadot.gov/mvd/motorcarriers/systemmap.htm#county Check with local officials when traveling on county roads or city streets for bridge embargo, detour, road embargo and vertical clearance information. State and interstate highways are valid routes except for restrictions listed on the bridge embargo, detour and road embargo, and vertical clearance maps located at http://www.iowadot.gov/mvd/motorcarriers/omcsMaps.htm.; abstract: Displays all non-restricted local road segments in the state of Iowa. Specific route information is only available once zoomed into the county level. County restriction map can be found here: http://www.iowadot.gov/mvd/motorcarriers/systemmap.htm#county Check with local officials when traveling on county roads or city streets for bridge embargo, detour, road embargo and vertical clearance information. State and interstate highways are valid routes except for restrictions listed on the bridge embargo, detour and road embargo, and vertical clearance maps located at http://www.iowadot.gov/mvd/motorcarriers/omcsMaps.htm.

Geologic mapping, in support of the USGS Omaha-Kansas City Geologic Mapping Project, shows the spatial distribution of artificial-fill, alluvial, eolian, and glacial deposits and bedrock in and near Omaha, Nebraska. Artificial fill deposits are mapped chiefly beneath commercial structures, segments of interstate highways and other major highways, railroad tracks, airport runways, and military facilities, and in landfills and earth fills. Alluvial deposits are mapped beneath flood plains, in stream terraces, and on hill slopes. They include flood-plain and stream-channel alluvium, sheetwash alluvium, and undivided sheetwash alluvium and stream alluvium. Wind-deposited loess forms sheets that mantle inter-stream areas and late Wisconsin terrace alluvium. Peoria Loess is younger of the two loess sheets and covers much of the inter-stream area in the map area. Loveland Loess is older and is exposed in a few small areas in the eastern part of the map area. Glacial deposits are chiefly heterogeneous, ice-deposited, clayey material (till) and minor interstratified stream-deposited sand and gravel. Except for small outcrops, glacial deposits are covered by eolian and alluvial deposits throughout most of the map area. Bedrock is locally exposed in natural exposures along the major streams and in quarries. It consists of Dakota Sandstone and chiefly limestone and shale of the Lansing and Kansas City Groups. Sand and gravel in flood plain and stream-channel alluvium in the Platte River valley are used mainly for concrete aggregate. Limestone of the Lansing and Kansas City Groups is used for road-surfacing material, rip rap, and fill material.

This feature layer contains planimetric polygons located within Linn County, Iowa and outside the City of Cedar Rapids boundaries. Examples of features found within this layer may include:Building footprintsSidewalksDrivewaysEdge of road pavementPaved parkingFor planimetric data within the City of Cedar Rapids boundaries, please contact the City GIS department.Update FrequencyApproximately once a monthAdditional ResourcesVisit Linn County, Iowa on the web.Visit Linn County, Iowa GIS on the web.Visit the Linn County, Iowa GIS portal. This site is updated as needed to reflect maps, apps, and data of interest from various County departments.Contact InformationQuestions? Contact the GIS Division by phone at 319.892.5250 or by email.

description: Recent developments in digital terrain and geospatial database management technology make it possible to protect this investment for existing and future projects to a much greater extent than was possible in the past. The Floodplain Mapping/Redelineation study deliverables depict and quantify the flood risks for the study area. The primary risk classifications used are the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The Floodplain Mapping/Redelineation flood risk boundaries are derived from the engineering information in the Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, Flood Boundary and Floodway Maps, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).; abstract: Recent developments in digital terrain and geospatial database management technology make it possible to protect this investment for existing and future projects to a much greater extent than was possible in the past. The Floodplain Mapping/Redelineation study deliverables depict and quantify the flood risks for the study area. The primary risk classifications used are the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The Floodplain Mapping/Redelineation flood risk boundaries are derived from the engineering information in the Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, Flood Boundary and Floodway Maps, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).

1:24,000 scale Geologic Map of the Mt. Davis Quadrangle, Nevada and Arizona. Nevada Bureau of Mines and Geology Map 105. Detailed geologic mapping by James E. Faulds in 1995. Field work by J. Faulds, Dept. of Geology, Univ. of Iowa, Iowa City, IA 52242, 1991-1994. This work was supported by National Science Foundation Grants EAR91-20383 and EAR93-16770 awarded to Faulds. Base map: U.S. Geological Survey Mt. Davis 7.5' Quadrangle, 1973. This map illustrates the distribution of bedrock and surficial deposits in the Mount Davis quadrangle, in Clark County, Nevada and Mohave County, Arizona area. The field work was in support of the U. S. Geological Survey COGEOMAP program. To download and view this map resource and associated text, and GIS zipped data-set, please see the links provided.

A 1:24,000 scale, geologic map of the Meadview North Quadrangle in Mohave County, Arizona and Clark County, Nevada, with description of 54 geologic units. Detailed geologic mapping by Mark A. Wallace, James E. Faulds, and Robert J. Brady of the Department of Geology, University of Iowa, Iowa City, IA 52242; Nevada Bureau of Mines and Geology, University of Nevada, Reno, NV 89557; Department of Geology and Geophysics, University of Calgary, Calgary, AB, Canada, T2N 1N. The GIS work was in support of the U. S. Geological Survey COGEOMAP program. The Geodatabase specifies feature datasets and feature classes, together with feature attributes, subtypes and domains, suitable for the printed geologic map. In addition to basic geology (lithology, contacts and faults, etc.), the maps may include metamorphic overprints, cross sections, and explanatory legend graphics such as correlation charts, used to supplement columnar legends. The Geologic Map of the Meadview North 7.5' Quadrangle in Mohave County, Arizona and Clark County, Nevada 1:24,000-scale is available for download online in Portable Document Format. Field work was supported by an EDMAP grant from the U.S. Geological Survey (Copperative agreement 1434-HQ-97-AG- 07146) and National Science Foundation grant EAR99-10977 awarded to Faulds. The U.S. Geological Survey also provided a field vehicle and funds for digitizing and publication of the map, for which we thank Gary Dixon and Peter Rowley. The National Park Service at Lake Mead National Recreation Area kindly provided boat access into some relatively inaccessible areas. The Meadview North Quadrangle lies within the northeasternmost part of the Colorado River extensional corridor (Howard and John, 1987; Faulds and others, 1990), which is a 70 to 100-km wide region of moderately to highly extended crust between the Colorado Plateau on the east and Spring Mountains on the west. The quadrangle contains much of the town of Meadview, Arizona, as well as the southern part of the Grand Wash trough (including much of the Gregg Basin), southern part of Wheeler Ridge, and northern end of a mountain range informally referred to as the Lost Basin Range (after Theodore and others, 1987). Base map: U. S. Geological Survey Meadview North 7.5-minute Quadrangle, 1984. To download and view this map resource and associated map text and GIS zipped data-set, please see the links provided.

This layer represents Zoning in Council Bluffs, IA. It is under ongoing maintenance by the City of Council Bluffs. The data is shared to Pottawattamie County GIS in cooperation with City of Council Bluffs GIS.

City and county boundaries within Scott County, Iowa.

These feature layers represent the environmental constraints within the project study area for the Interstate 80 project in Scott County, Iowa.